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  • Angiosperms  (132)
  • Springer  (132)
  • 1980-1984  (132)
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  • Springer  (132)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Transcription and processing of rRNA in higher plant cells (Daucus carota, Petroselinum crispum, Acer pseudoplatanus) (1980)
    Springer
    Plant systematics and evolution 134 (1980), S. 11-21 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Daucus ; Petroselinum ; Acer ; rRNA ; transcription ; precursors of less than 2.5 × 106 daltons ; processing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Actively dividing cells from parsley (Petroselinum crispum) and carrot (Daucus carota) (bothApiaceae) andAcer pseudoplatanus (Aceraceae) were used to detect the primary gene product of the rDNA in plant cells. Parsley and carrot cells were labelled with [32P] orthophosphate. In both cases only one high molecular weight rRNA precursor was present on polyacrylamide gels under non-denaturing conditions. Its molecular weight did not exceed 2.5 × 106 daltons. The component emerged from the heterogenous material after a labelling period of 5–10 min. In parsley cells 45 min after onset of incubation labelled mature rRNA (25S and 18S) arrived in the cytoplasm. InAcer pseudoplatanus (incubation period 60 min) two rapidly labelled components did emerge from polyacrylamide gels; their molecular weights were 2.3 and 3.2− 3.4 × 106 daltons. After electrophoresis under denaturing conditions the larger component was no longer present, thus indicating that it was an aggregate of different RNA molecules. The molecular weights of the rRNA precursors ofD. carota andP. crispum determined after electrophoresis in formamide gels were about 2.1 × 106 daltons. From these results we have no evidence for the existence of rRNA precursors exceeding the molecular weight of 2.5 × 106 daltons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985028
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  • 2
    Electronic Resource
    Electronic Resource
    Species novae generisEremostachys (Labiatae) (1980)
    Springer
    Plant systematics and evolution 134 (1980), S. 127-131 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Labiatae =Lamiaceae ; Eremostachys codonocalyx ; E. stenocalycina ; E. salangensis ; E. freitagii ; E. andersii ; new species ; Flora of Afghanistan and Iran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Five new species are described:Eremostachys codonocalyx from NE. Iran (related toE. subspicata),E. stenocalycina from NE. Afghanistan (related toE. alberti andE. hissarica),E. salangensis from NE. Afghanistan (close toE. bamianica),E. freitagii from E. Afghanistan (similar but not closely related toE. vulnerans), andE. andersii from E. Afghanistan (similar but not closely related toE. vulnerans), andE. andersii from NE. Afghanistan of isolated systematic position.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985034
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  • 3
    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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  • 4
    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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  • 5
    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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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    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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  • 8
    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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  • 9
    Electronic Resource
    Electronic Resource
    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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  • 10
    Electronic Resource
    Electronic Resource
    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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