Contrasted pollen capture mechanisms in Phyllocladaceae and certain Podocarpaceae (Coniferales)
نویسندگان
چکیده
منابع مشابه
Molecular phylogeny of extant gymnosperms and seed plant evolution: analysis of nuclear 18S rRNA sequences.
To study the evolutionary relationships among the four living gymnosperm orders and the interfamilial relationships in each order, a set of 65 nuclear 18S rRNA sequences from ferns, gymnosperms, and angiosperms was analyzed using the neighbor-joining and maximum-parsimony methods. With Selaginella as the outgroup, the analysis strongly indicates that the seed plants form a monophyletic group wi...
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versity, Canberra, Australia. Hylton Adie, University of KwaZulu–Natal, Scottsville, South Africa. Peter J. Bellingham and Ian A. Dickie, Landcare Research, Lincoln, New Zealand. Edward Biffin, The University of Adelaide, Adelaide, South Australia, Australia. Timothy J. Brodribb, University of Tasmania, Hobart, Tasmania, Australia. David A. Coomes, University of Cambridge, Cambridge, UK. James ...
متن کاملEcology and Distribution of Neotropical Podocarpaceae
Podocarps are a frequent, but rarely a dominant, component of neotropical wet forests extending from South America into central Mexico and the Greater Antilles. Although podocarps are often considered to be predominantly montane taxa, several species occur in lowland forest and are locally abundant on some Pacific and Atlantic coastal islands in Central America. Here we review literature on the...
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در فصل اول مقدمات و پیش نیازهای لازم برای فصل های بعدی فراهم گردیده است . در فصل دوم مساله توسیع مورد توجه قرار گرفته و ابتدا شرایطی که تحت آن از یک فشرده سازی نیم گروهی خاص یک زیرگروه نرمال بسته یک گروه به یک فشرده سازی متناظر با فشرده سازی اولیه برای گروه رسید مورد بررسی قرار گرفته و سپس ارتیاط بین ساختارهای مختلف روی این دو فشرده سازی از جمله ایده آل های مینیمال چپ و راست و... مورد بررسی قرا...
15 صفحه اولSerum Levels of Certain Cc and Cxc Chemokines in Birch Pollen Allergic Individuals out of the Pollen Season
Chemokines play a key role in the regulation of cell trafficking during immune responses. In pollen-allergic individuals, the roles of chemokines have been predominantly studied during active allergic reactions. However, little is known about chemokine levels and their effect on immune responses out of the pollen season when atopic individuals do not show clinical symptoms of allergy. Therefore...
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ژورنال
عنوان ژورنال: American Journal of Botany
سال: 1997
ISSN: 0002-9122
DOI: 10.2307/2446083