Cytotaxonomic Studies in the Tribe Quillajeae (Rosaceae)
نویسندگان
چکیده
منابع مشابه
Micromorphological study of the tribe Agrimonieae family Rosaceae in Iran
The current study, devoted to leaf micromorphology of tribe Agrimonieae in Iran including three genera (Agrimonia, Aremonia,and Sanguisorba),four species (Agrimonia eupatoria,Aremonia agrimonioides,S. minor, and S. officinalis), and six subspecies (A. eupatoria subsp. eupatoria, A. eupatoria subsp. grandis, A. eupatoria subsp. asiatica, S. minor subsp. minor, S. minor subsp. lasiocarpa, and S. ...
متن کاملCYTOTAXONOMIC STUDIES IN WEST HIMALAYAN BRYACEAE (MUSCI)
The meiotic chromosomes of 10 species (Pohlia elongata, Anomobryum cymbifolium, Brachymenium acuminatum, B. ochianum, B. sikkimense, Bryum cellulare, B. pseudotriquetrum, B. apiculatum, B. capillare and B. atrovirense), in four genera of the family Bryaceae of acrocarpous mosses are studied with special emphasis on their evolution, polyploidy and cytological features with reference to interrela...
متن کاملCytotaxonomic studies in six species of Vernonia (Asteraceae: Vernonieae)
In this report, we describe a mitotic analysis (Giemsa technique) of six species of the genus Vernonia sensu Baker (Asteraceae, Vernonieae, section Lepidaploa) in order to assess the validity of maintaining this genus (sensu Baker) or dividing it into several lesser genera (sensu Robinson). Specimens of the seven species were collected in “cerrado” and “campo rupestre” areas in the states of Sã...
متن کاملEndosperm formation in aposporous Crataegus (Rosaceae, Spiraeoideae, tribe Pyreae): parallels to Ranunculaceae and Poaceae.
Apomixis in Crataegus is primarily aposporous and requires pollination. The embryo sac is of the Polygonum type. A combination of meiotically unreduced embryo sacs with apparently reduced pollen would violate the usual requirement for a 2 : 1 ratio of maternal to paternal contributions to the endosperm. We therefore investigated the origin of endosperm in seeds of sexual diploids and apomictic ...
متن کاملCYTOTAXONOMIC STUDIES OF SOME IRANIAN VICIA SPECIES (FABACAEA)
This study concerns the cytotaxonomic investigations on twelve species belonging to three sections from the genus Vicia in Iran. A taxonomic background of the genus is given in brief. The previous counts reported for the genus in Index to plant chromosome number are summarized. In addition to one new count, the chromosome numbers of four species are reported for the first time. Briefly, the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1976
ISSN: 0026-6493
DOI: 10.2307/2395226