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  • Articles  (27)
  • Angiosperms  (27)
  • Springer  (27)
  • Springer Nature
  • 2000-2004
  • 1980-1984  (27)
  • 1981  (27)
Collection
  • Articles  (27)
Source
Keywords
Publisher
  • Springer  (27)
  • Springer Nature
Years
  • 2000-2004
  • 1980-1984  (27)
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    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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  • 2
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983205
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  • 3
    Electronic Resource
    Electronic Resource
    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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  • 4
    Electronic Resource
    Electronic Resource
    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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  • 5
    Electronic Resource
    Electronic Resource
    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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  • 6
    Electronic Resource
    Electronic Resource
    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
    Electronic Resource
    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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  • 8
    Electronic Resource
    Electronic Resource
    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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  • 9
    Electronic Resource
    Electronic Resource
    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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  • 10
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00989871
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