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  • Angiosperms  (27)
  • Springer  (27)
  • Springer Science + Business Media
  • 1980-1984  (27)
  • 1981  (27)
Collection
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  • Springer  (27)
  • Springer Science + Business Media
Years
  • 1980-1984  (27)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Chromosome numbers and rust susceptibility as taxonomic criteria inRosaceae (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 23-38 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rosaceae ; Uredinales ; Chromosome numbers ; rust susceptibility ; tribal classification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract BothNeuradoideae andChrysobalanoideae seem rust-free. TheSpiraeoideae andPomoideae are heavily susceptible toGymnosporangium rusts. While thePrunoideae resemble theRosoideae in being vulnerable to attacks ofPuccinia species, they are additionally susceptible toTranzschelia andThekopsora, whereas theRosoideae are characteristically afflicted byPhragmidium.—It is suggested (a) to treat theChrysobalanoideae as a separate family (Chrysobalanaceae), (b) to transferDryas from theRosoideae-Potentilleae-Dryadinae to theRosoideae-Cercocarpeae, and (c) to divide theRosoideae into two main groups of tribes: (i) the rust-freeKerrieae andCercocarpeae with x = 9, and (ii) the rust-susceptiblePotentilleae, Ulmarieae, Roseae andSanguisorbeae with x = 7.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983201
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  • 2
    Electronic Resource
    Electronic Resource
    The embryology ofEpipogium roseum (Orchidaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 1-7 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Orchidaceae ; Epipogium ; E. roseum ; Microsporogenesis ; female gametophyte ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Development of pollen and female gametophyte inEpipogium roseum (D. Don)Lindl. has been investigated. The embryo sac conforms to the Apinagia type. The taxonomic position ofEpipogium within the family is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984604
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  • 3
    Electronic Resource
    Electronic Resource
    Differentiation of Fraction 1 protein in relation to age and distribution of Angiosperm groups (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 89-113 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Nicotiana ; Gossypium ; Lemnaceae ; Fraction 1 protein ; differentiation and age of taxa ; migration to Australia ; land connections ; long distance dispersal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fraction 1 protein (F-1-protein) (ribulose bisphosphate carboxy-lase-oxygenase) contained inLemnaceae has been evolving for at least 50 million years because fossils of these plants have been identified in strata belonging to the Upper Cretaceous. Electrofocusing F-1-protein resolves the large subunit polypeptides coded by extranuclear DNA and the small subunit polypeptides coded by nuclear DNA. Four differences affecting isoelectric points of the large subunit polypeptides and eight affecting the small subunit polypeptides are now present among eleven species representing the four genera comprising theLemnaceae. In comparison, four differences in the large and 13 in the small subunit polypeptides exist among 63 species ofNicotiana; four differences in the large and eight differences in the small subunit polypeptides exist among 19 species ofGossypium. The number of differences in F-1-protein composition being of the same order of magnitude for the generaNicotiana, Gossypium, and the familyLemnaceae, we infer that these Angiosperms are of similar antiquity. Nicotiana species indigenous to Australia and Africa contain F-1-proteins whose large subunit polypeptides are different but some of whose small subunit polypeptides are like those found in species from the Western Hemisphere. The same situation is found for the F-1-protein inGossypium. These results are in harmony with the view that species ofNicotiana andGossypium have arrived in Australia via former land connections between S. America, Antarctica, and Australia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984611
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  • 4
    Electronic Resource
    Electronic Resource
    The flower biology ofCephalanthera longifolia (Orchidaceae)—pollen imitation and facultative floral mimicry (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 229-240 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Orchidaceae ; Cephalanthera longifolia ; Cistaceae ; Cistus salviifolius ; Hymenoptera ; Halictus ; Flower biology and ecology ; pollination ; pollen imitation ; floral mimicry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Solitary bees (Halictus sp.) were found to be the effective pollinators ofCephalanthera longifolia. In the same foraging flight the bees also visit flowers ofCistus salviifolius which has a similar colour pattern.Cephalanthera offers no reward to its pollinators, but orange papillae on its labellum successfully imitate pollen ofCistus. AsCephalanthera also attracts pollinators in the absence ofCistus, this is regarded as “facultative floral mimicry”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982788
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  • 5
    Electronic Resource
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    Genetic determination of pappus part number in the annual hybridMicroseris B 87 (Asteraceae—Lactuceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 235-246 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Asteraceae ; Lactuceae ; Microseris ; Canalized numbers ; quantitative genetics ; evolutionary genetics ; pappus parts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ChileanMicroseris pygmaea has a ten-part paleaceous pappus while the CalifornianM. bigelovii has five pappus parts on each achene. Hybrids between the two species have between five and ten pappus parts with averages below 7.5. Hybrid B 87 has an F 1 average value of 6.7 pappus parts. 140 F 2 plants were raised from this hybrid, and 12 F 3 families were obtained by selfing from F 2 plants. One larger F 4 family has been raised. Pappus part number in all of these is still canalized between 5 and 10. Variation within these limits is genetically determined by a quantitatively acting polygenic system. Modeling of this system suggests that a minimum of four, but probably not many more, genes are involved. This opens the possibility of a complete genetic analysis of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985187
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  • 6
    Electronic Resource
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    Microgeographic edaphic differentiation in allozyme polymorphisms of wild barley (Hordeum spontaneum, Poaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 287-292 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Hordeum spontaneum ; Allozymes ; microgeographic differentiation ; population genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Allozymic variation in proteins encoded by 22 loci was analyzed electrophoretically in 278 individual plants of wild barley,Hordeum spontaneum, the progenitor of cultivated barley, in four 100 meter transects, in Israel, each equally subdivided into basalt and terra rossa soil types. Significant differentiation according to soil was found in 9 alleles. Our results suggest that allozyme polymorphisms in wild barley are at least partly adaptive, and differentiate by edaphic natural selection rather than by stochastic processes, and/or neutrality of allozymic variants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985193
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  • 7
    Electronic Resource
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    Tillandsia carminea — eine interessante neue Bromeliacee aus dem Orgelgebirge bei Rio de Janeiro (Brasilien) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 293-295 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Bromeliaceae ; Tillandsia subgen.Anoplophytum ; T. carminea ; spec. nova ; Flora of Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tillandsia carminea is a new, morphologically and ecologically distinct species, related toT. stricta Solander, which occurs in the Serra dos Orgaos near Teresopolis, Brazil. It has been taken forT. rosea Lindley, but new investigations have shown thatT. rosea is a synonym toT. stricta and thatT. carminea is a good and distinct species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985194
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  • 8
    Electronic Resource
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    Sclerorhachis leptoclada (Asteraceae-Anthemideae), eine neue Art aus dem südlichen Khorasan (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 297-299 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Asteraceae-Anthemideae ; Sclerorhachis leptoclada Rech. f. ; spec. nova ; Flora of Iran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A fourth species ofSclerorhachis, S. leptoclada Rech. f., has been discovered in S. Khorasan. It differs from the three known species by its tender habit, rosette leaves with few short segments, extremely reduced stem leaves, and very small heads.Sclerorhachis with its four vicarious species confined to the most arid parts of the Iranian highlands is believed to belong to the paleoxeromorphics (Rechinger 1952).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985195
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  • 9
    Electronic Resource
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    Heterochromatin and chromosome variation in cultivated species ofTulipa subg.Eriostemones (Liliaceae) (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 47-55 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Tulipa subg.Liliaceae ; Eriostemones ; Giemsa banding ; heterochromatin ; karyosystematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The chromosomes of several cultivatedTulipa species belonging to the subg.Eriostemones were examined using conventional staining and C-banding techniques. Most of the species have lightly banded chromosomes with heterochromatin content varying from nil to about 15%. The banding patterns of several taxa are described and discussed in regard to species relationships.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983921
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  • 10
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    Zur systematischen Stellung der GattungProckia: Karyologie und Epidermisskulptur im Vergleich zuFlacourtia (Flacourtiaceae),Grewia (Tiliaceae) und verwandten Gattungen (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 57-76 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Flacourtiaceae:Prockia ; Flacourtia ; Idesia ; Lacistema ; Rawsonia ; Tiliaceae:Grewia ; Luhea ; Karyomorphology ; epidermis ultrastructure ; Chromosomes and systematics of tropical woody plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Detailed analyses of karyology and leaf morphology do not support relationships betweenFlacourtiaceae andTiliaceae. In spite of different chromosome numbers,Prockia (2n = 18),Flacourtia (2n = 22) andRawsonia (2n = 22) are very similar in karyomorphology, indicating a certain karyological uniformity withinFlacourtiaceae. Lacistema (2n = ca. 62) appears more isolated. On the other hand, theTiliaceae Grewia (2n = 18) andLuhea (2n = 36) have much in common and differ remarkably from the Flacourtiaceous genera. The salicoid leaf-teeth ofProckia are also found inIdesia, but never inTiliaceae. Epidermis ultrastructure reveals certain relationships betweenProckia andFlacourtia in contrast to the strongly differingGrewia. Idesia has a rare und unique epidermis sculpture. — Basic chromosome numbers and chromosomal evolution within theFlacourtiaceae are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983922
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  • 11
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    Fruit dimorphism inPhaseolus sublobatus (Fabaceae) and its evolutionary significance (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 67-72 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Leguminosae ; Fabaceae ; Phaseolus sublobatus ; Geocarpy ; amphicarpy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Populations of the annualPhaseolus sublobatus from different ecogeographical zones are genetically differentiated. In twelve populations from the western ghats (Maharashtra range) chasmogamous flowers are arranged in peduncled capitate racemes borne in leaf axils of higher nodes. One population (Poona Race S4) has additional inflorescences, also with chasmogamous flowers, on the main axis between the cotyledonary node and the ground. When the pods of these flowers ripen, the inflorescence gradually coils and, eventually, gets bury the fruits in the soil. This phenomenon is not known in any other plant.—The seed-coat patterns as revealed by SEM, and germination behaviour of both aerial and subterranean seeds are similar, and both types of seeds lack dormancy.—Heavy seed predation selection pressure is probably the principal cause for the evolution of fruit dimorphism inP. sublobatus. The origin of geocarpy in relation to fruit dimorphism and seed predation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983206
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  • 12
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    The evolutionary significance of multigermicity in the genusSpinacia (Chenopodiaceae) (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 57-61 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Chenopodiaceae ; Spinacia ; S. turkestanica ; S. tetrandra ; Reproduction ; multigermicity ; seedball ; dioecy ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The presence of multigerm seedballs in the chenopodiacious genusSpinacia is noted. In the wild, colonising, and “weedy” dioecious species,S. turkestanica andS. tetrandra, the distribution of a multigerm seedball could effectively overcome the problem posed by isolation of the sexes. The hypothesis is tested assessing the extent of intra-seedball progeny hybridisations and seed production in the two wild species. The success in seed production by intra-seedball progeny crosses suggests that the distribution of such seedball progeny groups permits not only a percentage survival under isolation of these dioecious plants, but also the colonisation of areas outside that of the parent populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983204
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  • 13
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    Biosystematic studies onCapsella bursa-pastoris (Brassicaceae): Enzyme polymorphism in natural populations (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 73-94 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Brassicaceae ; Capsella bursa-pastoris ; Isoenzyme polymorphism ; population analyses ; geographic variation ; heterozygosity ; breeding system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genetic variability of natural populations ofCapsella bursapastoris in North- and Middle-Europe has been estimated by means of enzyme assays. Zymograms of 81 populations have been developed. 17 loci could be identified, and 8 of them can be heterozygous. Genetic variability is greater between populations than within. No correlation between actual population sizes and genetic heterogeneity could be detected. Some electromorphs shift their frequencies proportionally to increasing adversity of climatic conditions, some appear to be constant over the whole area, and others are characterized by an apparently irregular variation pattern. Marginal populations comprise a significantly higher proportion of heterozygous plants than central ones. Apart from this clinal variation pattern, a mosaic pattern, strongly related to habitat conditions, was observed: genetic heterogeneity is greater in more intensively disturbed sites. The pattern of genetic variation in natural populations ofCapsella bursa-pastoris is rather highly influenced by the breeding system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983207
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  • 14
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    Distributional patterns and an additional species of thePassiflora vitifolia complex: Amazonian species diversity due to edaphically differentiated communities (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 95-105 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Passifloraceae ; Passiflora involucrata ; stat. et comb. nov. ; Species β-diversity ; Flora of Amazonia ; Peru
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Field studies in Amazonian Peru show that thePassiflora vitifolia complex, a microcosm of many larger taxa, is concentrated in Amazonia with 4 ecologically separated species. One species is restricted to seasonally inundated forests, a second to non-inundated white sand soils, a third to non-inundated lateritic soils, and the fourth mostly to non-inundated alluvial soils. A new combination is formally proposed to recognize the white sand taxon, previously regarded as a variety, as a distinct species:P. involucrata. The importance of β-diversity in maintaining high Amazonian species diversity is emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983208
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  • 15
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    A chemotaxonomical study of someBoraginaceae: pyrrolizidine alkaloids and phenolic compounds (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 127-134 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Boraginaceae ; Pyrrolizidine alkaloids ; phenolic compounds ; chemotaxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract By means of thin layer chromatography pyrrolizidine alkaloids and phenolic compounds in some members of the familyBoraginaceae, subfamiliesHeliotropioideae andBoraginoideae, were studied. FromOmphalodes verna a main alkaloid was isolated with an isoretronecanol (or stereoisomeric) nucleus. The chemotaxonomical model ofTétényi forBoraginaceae based on fatty acids is generally supported, but relationships betweenHeliotropioideae andCynoglosseae appear to be closer, suggesting parallel developments from common ancesters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983210
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  • 16
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    The tubular exine ofLauraceae andHernandiaceae, a novel type of exine structure in seed plants (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 139-146 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Magnoliidae ; Lauraceae ; Hernandiaceae ; Pollen morphology ; pollen ultrastructure ; Angiosperm phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pollen grains ofLauraceae andHernandiaceae are characteristic in having a tubular exine of ± microfibrillar structure. This is coated with a layer of medium electron-dense globules and very peculiar spines, made up of a substance differing from that of the exine. Such a pollen wall structure is otherwise unknown in seed plants and thus adds to the list of odd features erratically present in various taxa of the Ranalean complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984614
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  • 17
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    Seed and fruit anatomy ofCocculus hirsutus (Menispermaceae) (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 95-102 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Menispermaceae ; Cocculus hirsutus ; Seed ; fruit ; anatomy ; affinities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ovules ofCocculus hirsutus are anatropous, bitegmic and, crassinucellate. The fruit is drupaceous, black purple, and laterally compressed and has a pericarp demarcated into exocarp and endocarp. The seeds are curved around the basal bodies. Testa and tegmen cells are thin-walled and unspecialized. In the ripe seed the inner epidermis of the tegmen persists, whereas the entire testa and the outer layer of the tegmen degenerate. Relationships of theMenispermaceae toRanunculaceae, Berberidaceae, andLardizabalaceae are supported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983924
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  • 18
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    Resistenzphysiologische Grundlagen der evolutiven Kälteakklimatisation von Sproßpflanzen (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 145-180 
    Details
    ISSN: 1615-6110
    Keywords: Coniferophytina ; Angiosperms ; Arecaceae ; Poaceae ; Quercus ; Citrus ; sclerophyllous trees ; mountain plants ; Acclimatation ; chilling resistance ; frost resistance ; stress ecotypes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gradations in cold resistance of plants with different latitudinal and altitudinal distribution, and the various categories of chilling and freezing resistance are hypothesized to be evolutionary steps of adaptive responses to increasing low temperature stress and annual seasonality. The gradual lowering of the critical phase transition temperature of biomembrane lipids, the capacity of persistent supercooling of tissues, and the development of a dormancy linked freezing-tolerance are considered to be essential mechanisms resulting in improved acclimatation to low temperature climates.
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    URL: http://dx.doi.org/10.1007/BF00989871
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  • 19
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    The breeding system ofEmblingia (Emblingiaceae) (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 63-65 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Emblingia ; Emblingiaceae ; Sapindaceae ; Dodonaea ; Stylobasidaceae ; Stylobasium ; Gyrostemonaceae ; Anemophily ; entomophily ; autogamy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Emblingia is a short lived fire weed with a highly autogamous breeding system.
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    URL: http://dx.doi.org/10.1007/BF00983205
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  • 20
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    Vergleichende cytotaxonomische Untersuchungen anRanunculus seguieri und der Artengruppe desR. alpestris (Ranunculaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 47-60 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Ranunculaceae ; Ranunculus seguieri ; R. alpestris ; R. traunfellneri ; R. bilobus ; R. crenatus ; Relationship betweenR. seguieri andR. alpestris s. lat.: morphology ; crossing experiments ; chromosome numbers ; karyotypes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Morphological and cytological investigations as well as crossing experiments were carried out withRanunculus seguieri Vill. and 4 species of theRanunculus alpestris L. group (R. alpestris L.,R. traunfellneri Hoppe,R. bilobus Bertol.,R. crenatus Waldst. & Kit.). ForR. seguieri andR. alpestris, localities and distribution are given in addition to extensive diagnoses. A key to the species includes morphological characteristics and distribution data forR. traunfellneri, R. bilobus, andR. crenatus. New diagnostic characters are described. Crossing experiments betweenR. seguieri and the species of theR. alpestris group were unsuccessful. All 5 species have a chromosome number of 2n = 16, the record forR. bilobus is new. There is no statistically significant difference between the karyotypes ofR. seguieri andR. alpestris s. str. Nevertheless, according to morphological evidence and crossing experiments,R. seguieri is not closely related to theR. alpestris group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984608
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  • 21
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    Embryology ofEriocaulon setaceum (Eriocaulaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 175-188 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Eriocaulaceae ; Eriocaulon setaceum ; Embryology ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Eriocaulon setaceum can be characterized by: young microsporangium wall with epidermis, endothecium (with fibrous thickenings), and glandular tapetum (uninucleate cells); pollen grains 3-celled, spiraperturate; embryo sac development according to the Polygonum type and with antipodal cyst; endosperm nuclear; embryo small, with incipient differentiation into cotyledonary and epicotylary loci; seed coat mainly from the inner layers of the integuments; pericarp 2-layered and membranous. Embryologically, theEriocaulaceae are nearer to theXyridaceae than to otherFarinosae. Their elevation to the rank of an order,Eriocaulales, therefore appears justified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985181
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  • 22
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    Effect of allopolyploidy on the activity of selected enzymes inHibiscus (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 189-198 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Malvaceae ; Hibiscus acetosella ; H. asper ; H. surattensis ; H. radiatus ; andH. cannabinus ; Allopolyploidy ; evolution of dosage compensation ; alcohol dehydrogenase ; malate dehydrogenase ; leucine aminopeptidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mature seeds of diploid and tetraploidHibiscus species were analyzed for enzyme activity (alcohol dehydrogenase, malate dehydrogenase, leucine aminopeptidase), total protein content, DNA amount and dry weight. The recently formed tetraploid,H. radiatus, generally had enzyme and protein levels very similar to the sum of its progenitors, while the more ancient speciesH. acetosella had several lower levels. This difference may reflect the greater amount of timeH. acetosella has had to evolve dosage compensations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985182
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    Investigations on the content of steroidal alkaloids and sapogenins withinSolanum sect.Solanum ( = sect.Morella) (Solanaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 61-71 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Solanaceae ; Solanum sect.Solanum ; Diosgenin ; tigogenin ; solasodine ; chemosystematics ; ontogenetic shift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plant material of 55 strains from 32 species ofSolanum sect.Solanum ( = sect.Morella) has been investigated for the content of steroidal alkaloids and sapogenins. The leaf-extracts of all species contain diosgenin resp. tigogenin or both together in considerable amount. On the contrary the characteristic steroidal alkaloid solasodine was absent in these samples. For 29 species the presence of steroidal sapogenins has been proved for the first time. In unripe fruits, however, solasodine could be detected in most of the species examined. New occurences of solasodine are reported for seven further species. These chemical results may contribute to a better comprehension of the difficult genusSolanum.—Ontogenetic studies on different organs ofS. atriplicifolium show the relationship between accumulation of steroidal compounds and plant maturity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984609
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    Genetic variation inSolanum pennellii: Comparisons with two other sympatric tomato species (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 11-45 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Solanaceae ; Lycopersicon ; Solanum pennellii ; Allozymes ; electrophoresis ; isozymes ; mating systems ; self-incompatibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic variation—primarily in 19 genetic loci of seven enzyme systems—was analyzed in accessions from various parts of the geographic range ofSolanum pennellii, which according to all tested biosystematic criteria behaves like a species ofLycopersicon. In comparison with the largely sympatricL. hirsutum andL. pimpinellifolium, this species exhibits the same trends of reduced allogamy and decreased genetic variation toward the north and south margins of its distribution, though to a much lesser degree; it does not exhibit their trends toward smaller flower size in the same peripheral regions. All three species agree to a considerable extent in the ranking of their tested loci in respect to degree of variablility; however, overall polymorphy is highest inS. pennellii. Except for the appearance of self-compatibility at its southernmost margin,S. pennellii is exclusively and rigidly self-incompatible. Alleles are distributed much more uniformly over the range than in the previously mentioned species, marginal and internal endemic mutants being much less abundant. A marked geographic disagreement is evident in regions of high and low variation. These differences in patterns of genetic variability are reconciled in terms of observed differences in mating systems, probable age of distributions, and adaptive strategies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983920
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    Electronic Resource
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    Eine neueTillandsia-Art aus Südmexico:T. kolbii (Bromeliaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 259-262 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Bromeliaceae ; Tillandsia subgen.Allardtia ; T. kolbii ; spec. nova ; Flora of Mexico
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species ofTillandsia is described and discussed in regard to related species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985189
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    Electronic Resource
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    Ultrastructure of the stylar canal cells ofCitrus limon (Rutaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 263-274 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rutaceae ; Citrus limon ; Style ; canal cells ; canal filling substance ; ultrastructure ; anatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ultrastructure of the canal cells and the canal filling substance ofCitrus limon have been studied. At maturity the canal cells are very rich in cytoplasm. Their inner tangential walls lining the canal are much thickened and formed by two layers: the outer corresponds to the original wall, the inner is formed by subsequent deposition of abundant materials of different origin. This thickening occurs at the same time as the filling of the stylar canal. Both events are paralleled by considerable dictyosomic activity, the formation of a large amount of rough endoplasmic reticulum, and the incorporation of small cytoplasmic masses into the cell wall, due to plasmalemma evaginations. — The material in the stylar canal has a heterogeneous ultrastructure aspect and consists of polysaccharides, proteins and lipids; it presumably provides nutrients for the growing pollen tubes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985190
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  • 27
    Electronic Resource
    Electronic Resource
    Der Knotenbau einigerRubiaceae (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 103-111 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rubiaceae ; Nodal anatomy ; leaf base ; stipules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The leaf base vascularization in most of theRubiaceae corresponds to the unilacunar pattern with one complex trace. Only some species are known to have a trilacunar nodal pattern with three traces. In the unilacunar type one pair of smaller bundles separates from the complex lacunary leaf trace laterally, each soon forking into two arms: One arm becomes a marginal vein of the petiole, the other, besides supplying the stipules, forms a ± distinct vascular “bridge” within the cortex of the nodal flanks. In theRubieae this flank bridge develops as a very distinct vascular “ring” commissure out of which the whorled leaf-like appendages are vascularized; only the opposite true leaves receive their complex trace out of the lacunes directly. Axillary branches originate only from these true leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983925
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