Pollen studies in the genus Echinops L. and Xeranthemum group (Asteraceae)
نویسندگان
چکیده
منابع مشابه
Morphological, anatomical and palynological studies of the genus Zoegea L. (Asteraceae) in Iran
The genus Zoegea L. belongs to Asteraceae family and has about 10 species in the world. This genus is considered to be an Irano-Turanian and Mediterranean element and is distributed in south-western and central Asia and in the central, southern, north-western and south-western parts of Iran as well. The subspecies classification of the genus is not consensus and various classifications could be...
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Achene morphology of 49 taxa of the genus Centaurea L. was studied in terms of 19 different characteristics. On the basis of the variation in these features, some sections, such as sect. Cyanus with hairy hilum, were separated. Despite various differences, C. leuzeoides and C. gilanica were categorized in the section Psephelloideae, a section with lots of character variations within its species...
متن کاملPantoporate pollen in the Asteraceae (Vernonieae)
Pantoporate pollen, which occurs sporadically in the Monocots and Dicots, has now been found in Asteraceae in two apparently related genera of the tribe Vernonieae, Polydora Fenzl and Oocephala H.Rob. Disposition of pores in Polydora seems more asymmetric than in Oocephala. Based on the known relationships within the Vernonieae, some conjectures are made regarding development of the pantoporate...
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The inflorescences of ten species of the genus Jatropha were fixed in Cornoy’s fluid (6:3:1). Acetocarmine stain (2%) was used for staining the pollen mother cells. Seven species exhibited 11 bivalents and 2n =22 and x=11. But the two other species, J.villosa var. villosa and J.villosa var. ramnadensis showed only 10 bivalents and 2n number of 20 chromosomes and x=10. The study concluded the oc...
متن کاملThe Thrips genus-group (Thysanoptera: Thripidae) in Iran
جنس تک گونه‌ای Sphaeropothrips برای اولین بار از ایران گزارش می‌شود. این جنس چهارمین عضو گروه جنس Thrips می‌باشد که تاکنون از ایران گزارش شده‌اند. کلیدی جهت تشخیص این چهار جنس ارائه می‌شود. همچنین اطلاعاتی در مورد این چهار جنس و برخی مشکلات در تشخیص میزبان گیاهی واقعی بال ریشکداران ایران مورد بحث قرار می‌گیرند.
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ژورنال
عنوان ژورنال: Botanical Journal of the Linnean Society
سال: 2007
ISSN: 1095-8339,0024-4074
DOI: 10.1111/j.1095-8339.2007.00671.x