Results 181 to 190 of about 1,666 (209)
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Apogamy, apospory, and parthenogenesis in the Pteridophytes
The Botanical Review, 1939There can be no doubt that the plants most favorable for the study of apogamy and apospory are the homosporous leptosporangiate Filicales, in many of which these deviations in life cycles have been found to occur in nature and also under cultural conditions. They are not, however, at present fully understood.
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Apospory in Paspalum thunbergii
Australian Journal of Botany, 2004The cytology, development of aposporous embryo sac, pro-embryo and pseudogamy in Paspalum thunbergii Kunth ex Steud. was studied. P. thunbergii was found to be a tetraploid cytotype, with a chromosome number of 40. Meiosis of the pollen mother cells was irregular, pollen viability was low and multiporate pollens were often observed.
Guohua Ma +3 more
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INDUCED APOSPORY IN THE LIVERWORT BLASIA PUSILLA
American Journal of Botany, 1968Immature sporophytes of Blasia pusilla L. collected in the field were excised from the protective gametophytic tissues and cultured on a slightly modified Knop's agar substrate in microphytotrons. Under the experimental conditions the setae elongated and after 33½ to 6 weeks many began to give rise to from 1 to 20 or more aposporous outgrowths.
Livija Raudzens, Edwin B. Matzke
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The fine structure of fern root cells showing apospory
Developmental Biology, 1970Abstract Isolated roots of the fern, Pteridium aquilinum were grown on growth-supporting medium (White's plus 5% coconut milk) and on apospory-promoting medium (Knudson's inorganic salts with or without 10−7 M kinetin). In the latter medium growth of the root ceased and diploid gametophytes were formed in 8 to 10 weeks from outer cells of the root ...
M H, Munroe, P R, Bell
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Apospory in leaf culture of staghorn fern (Platycerium bifurcatum)
Plant Cell Reports, 2002The induction, origin, morphology, and ploidy of aposporous gametophytes produced on juvenile leaves of the fern Platycerium bifurcatum (Cav.) C. Chr. were studied. Leaf explants were grown on modified Murashige and Skoog medium with 0%, 0.01%, 0.1%, 1%, or 2% sucrose.
J. Ambrožič-Dolinšek +3 more
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Somatic Apospory and Polyembryony in Minuria integerrima (DC) Benth
Nature, 1964THE genus Minuria (DC) is endemic to Australia and its six species are small undershrubs of the drier parts of the continent.
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A Study of Apospory in Pteridium aquilinum
American Fern Journal, 1949thesis on the Ferns of Quebec,7 Brother Marie-Victorin included this fern, remarking that since it occurs in Vermont almost up to the Canadian boundary, it is surely present in Quebec also. Although this was doubted by others, the fern was later discovered near Bedford, in Quebec a few miles north of the Vermont border, as reported by Mousley.8 In ...
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Hybridity and autopolyploidy increase the expressivity of apospory in diploid Paspalum rufum
Plant Systematics and Evolution, 2016Luciana Delgado +5 more
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