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  • Compositae
  • Springer  (8)
  • American Chemical Society
  • American Institute of Physics (AIP)
  • Elsevier
  • Oxford University Press
  • 1975-1979  (8)
Collection
Keywords
Publisher
  • Springer  (8)
  • American Chemical Society
  • American Institute of Physics (AIP)
  • Elsevier
  • Oxford University Press
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Evolutionary implications of herbivory onVernonia (Compositae) (1977)
    Springer
    Plant systematics and evolution 128 (1977), S. 277-286 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Vernonieae ; Vernonia ; Lepidoptera ; Insect resistance ; antifeedant ; sesquiterpene lactones ; glaucolide-A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A field insect feeding experiment was conducted with two species ofVernonia which produce the sesquiterpene lactone glaucolide-A, one species which does not contain this bitter compound, and two F1 hybrid combinations. Also, naturalVernonia populations were observed over a two year period for their degree of herbivory. Contrary to the pattern observed in laboratory feeding preference tests,Vernonia flaccidifolia, the species lacking sesquiterpene lactones, was consistently fed upon less by insects than wereV. gigantea andV. glauca. Even though glaucolide-A appears to adequately protect some Vernonias against herbivores, especially mammals,Vernonia flaccidifolia has lost this compound. ApparentlyV. flaccidifolia has evolved an alternative defensive mechanism which is more effective against insects but less effective against mammalian herbivores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984563
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  • 2
    Electronic Resource
    Electronic Resource
    Variability of the inflorescence ofMicroseris laciniata (Compositae: Cichorieae) (1979)
    Springer
    Plant systematics and evolution 131 (1979), S. 17-34 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Cichorieae ; Microseridinae ; Perennials ; variability ; inflorescence ; achenes ; phyllotaxis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Quantitative characters of the flowering head of a garden population ofMicroseris laciniata were scored during the second, third, and fourth season of growth. Number of achenes per head, number of phyllaries per head and the average number of pappus parts per achene in single heads show significant plant to plant variation. Achenes per head and pappus parts per achene were scored in identical plants in two subsequent seasons. The number of pappus parts per achene varies freely between five and ten. This contrasts with annual species ofMicroseris in which either five or ten pappus parts are found, depending on the species. In spite of a clear plant-specific average of pappus parts, both high and low pappus part determination can be demonstrated in all specimens. The number of pappus parts depends on the position of an achene on the receptacle, marginal achenes usually having fewer pappus parts than central ones. This gradient is not closely correlated with the position of an achene on the “genetic spiral”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984120
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  • 3
    Electronic Resource
    Electronic Resource
    Taxonomic, evolutionary, and functional considerations ofCompositae pollen ultrastructure and sculpture (1978)
    Springer
    Plant systematics and evolution 130 (1978), S. 209-218 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Asteraceae ; Vernonieae ; Palynology ; pollen ultrastructure ; function ; phylogeny ofCompositae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two basic patterns of exine ultrastructure are found in theCompositae, the caveate Helianthoid pattern and the non-caveate Anthemoid pattern. TheHeliantheae, Astereae, Inuleae, Sececioneae, Calenduleae andEupatorieae all have pollen with caveate exines. TheMutisiseae, Vernonieae andCardueae have predominately Anthemoid pollen. TheAnthemideae, Arctoteae andLactuceae have pollen with exines of both patterns. Recent investigations of pollen in theVernonieae suggest that these exine ultrastructures in the family have evolved in response to mechanical stresses on the wall which are caused by changes in volume of the grain as it loses or gains water from its environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982805
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  • 4
    Electronic Resource
    Electronic Resource
    Evolution of male sterility mechanisms in gynodioecious and dioecious species ofCirsium (Cynareae, Compositae) (1979)
    Springer
    Plant systematics and evolution 132 (1979), S. 327-332 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Cynareae ; Cirsium ; Gynodioecy ; subdioecy ; dioecy ; male sterility ; sex ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genusCirsium comprises both gynodioecious and dioecious species. The observation of microsporogenesis in female plants ofC. montanum, C. oleraceum, C. palustre andC. spinosissimum shows that the male sterility is due to a degeneration of the tapetum. This degeneration occurs more or less early according to the species and, in the light of these results, a scheme of evolution in the male sterility mechanism is proposed. Furthermore, the male sterility mechanism inC. montanum is very similar to that previously found in female plants of the dioecious speciesC. arvense. This fact enhances the possibility of evolution of the dioecy ofC. arvense from the gynodioecy found in other species. According to these results, a general scheme of evolution of sexes in the genusCirsium is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982395
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  • 5
    Electronic Resource
    Electronic Resource
    Beiträge zur Systematischen Anatomie derAnthemideae: Die Spaltöffnungsapparate (1978)
    Springer
    Plant systematics and evolution 130 (1978), S. 167-190 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Anthemideae ; Achillea ; Anthemis ; Artemisia ; Chrysanthemum ; Matricaria etc. ; Systematical anatomy ; stomatal apparatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The subdivision of theAnthemideae into two subtribes purely on the grounds of the presence or absence of receptacular paleae can no longer be maintained. Anatomical data may serve as a basis for a more adequate division of the tribe. This survey of the stomatal apparatus types within theAnthemideae is based on the investigation of 29 species from 15 genera and the evaluation of literature data: Anomocytic stomatal apparatus occur in all species examined, anisocytic at least in all genera investigated by us. We even found representatives of some rare types, such as polo-, helico- or hemiparacytic apparatus, in nearly all species. Diacytic types were not found inOtanthus, Artemisia, Tripleurospermum, Tanacetum corymbosum, and they also appear to be lacking inSantolina andEriocephalus. Paracytic stomatal apparatus and a new type which links paracytic with actinocytic and cyclocytic was discovered inOtanthus maritimus andArtemisia stellerana.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982802
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  • 6
    Electronic Resource
    Electronic Resource
    Mitotic cycle time and DNA content in annual and perennialMicroseridinae (Compositae, Cichoriaceae) (1976)
    Springer
    Plant systematics and evolution 126 (1976), S. 323-330 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Cichoriaceae ; Microseridinae ; DNA content ; mitotic cycle time ; annuals ; perennials ; developmental rates ; nucleotype
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Within eight annual and perennialMicroseridinae species studied, the duration of the mitotic cycle is positively correlated with the nuclear DNA content, cycle time (hrs) = 7.3 + 0.32 × pg DNA/nucleus. Within the generaAgoseris andMicroseris, the annuals have lower DNA contents and more rapid mitotic cycle times than do the perennials. This relationship is predicted by the nucleotypic theory ofBennett. Annual species ofPyrrhopappus have relatively high DNA contents and a proportionately longer mitotic cycle time, but contrary to that expected by the nucleotypic theory as originally proposed have the fastest growth rate and shortest generation time observed in theMicroseridinae. This rapid developmental rate is discussed, nucleotypically, however, by analyzing relationships between DNA content, mitotic cycle time, and cell size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983368
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  • 7
    Electronic Resource
    Electronic Resource
    Pappus part number in annual species ofMicroseris (Compositae, Cichoriaceae) (1978)
    Springer
    Plant systematics and evolution 129 (1978), S. 119-134 
    Details
    ISSN: 1615-6110
    Keywords: Compositae ; Cichoriaceae ; Microseris ; Canalization ; pappus ; inbreeding ; hybrids ; evolutionary genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract All North American annual species of the genusMicroseris have a five-part pappus, the one South American annual,M. pygmaea, has ten pappus parts. The pappus develops over a constant number of ten provascular bundles with or without inhibition between alternate sites of pappus development. Each natural population contains a predictable proportion of achenes with aberrant pappus part numbers. Hybridization betweenM. bigelovii (5 parts) andM. pygmaea results in F 1 and F 2 plants with many aberrant achenes. In each plant either five or ten can be shown to be the basic number with aberrant numbers following a Poisson distribution for numbers added to 5 or deleted from 10. Occasional plants show no basic number but have a random distribution of numbers about an intermediate mean. The evolutionary genetics of this character is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988986
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of some sesquiterpenic lactones on the growth of certain secondary tropical species (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 305-313 
    Details
    ISSN: 1573-1561
    Keywords: sesquiterpenic lactones ; allelopathy ; terpenic inhibitors ; Compositae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Results of biotests carried out with several sesquiterpene lactones produced byAmbrosia cumanensis are presented. These compounds showed different effects on the germination and growth of several species of the secondary vegetation of a tropical zone of Mexico.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00989339
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