Farina Production by Gametophytes of Argyrochosma nivea (Poir.) Windham (Pteridaceae) and its Implications for Cheilanthoid Phylogeny
نویسندگان
چکیده
منابع مشابه
Toward a monophyletic Notholaena (Pteridaceae): resolving patterns of evolutionary convergence in xeric-adapted ferns
With over 1,000 species, Pteridaceae comprises approximately 10% of extant fern diversity and is notable for its extreme morphological and ecological disparity. In addition to species-rich and predominantly forest-dwelling genera such as Adiantum and Pteris, the family includes floating, freshwater aquatics (Ceratopteris), mangrove specialists (Acrostichum), obligate epiphytes (Vittaria), and e...
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the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis,a one-way anova experimental design was carried out. 24 sednior students of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inter...
15 صفحه اولfacilitating lexical access for the fluent production of speech
the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis , a one- way anova experimental design was carried out. 24 senior student of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inte...
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متن کاملUnique expression of a sporophytic character on the gametophytes of notholaenid ferns (Pteridaceae).
PREMISE OF THE STUDY Not all ferns grow in moist, shaded habitats; some lineages thrive in exposed, seasonally dry environments. Notholaenids are a clade of xeric-adapted ferns commonly characterized by the presence of a waxy exudate, called farina, on the undersides of their leaves. Although some other lineages of cheilanthoid ferns also have farinose sporophytes, previous studies suggested th...
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ژورنال
عنوان ژورنال: American Fern Journal
سال: 2012
ISSN: 0002-8444,1938-422X
DOI: 10.1640/0002-8444-102.3.191