Pollinium structure in Epistemma: Periplocoideae (Apocynaceae)
نویسندگان
چکیده
منابع مشابه
Generic delimitations in tuberous Periplocoideae (Apocynaceae) from Africa and Madagascar.
BACKGROUND AND AIMS The number of genera included in Apocynaceae subfamily Periplocoideae is a matter of debate. DNA sequences are used here as an independent dataset to clarify generic relationships and classification of the tuberous periplocoid genera and to address the question of the phylogenetic interpretation of pollinia formation in Schlechterella. METHODS Representatives of nearly all...
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This study contributes to our understanding of the phylogenetic significance and major evolutionary trends in the wood of the dogbane family (Apocynaceae), one of the largest and economically most important angiosperm families. Based on LM and SEM observations of 56 Apocynoideae species-representing all currently recognized tribes-and eight Periplocoideae, we found striking differences in vesse...
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Anther primordium of Malaxis muscifera (Lindl.) Kuntze initiated as a homogenous mass of meristematic cells is surrounded by protoderm. Two thecae are oriented towards the labellum, each of them consisted of a mass of archesporial cells. The hypodermal layer of sporogenous cells divide periclinally to form an endothecial, a middle layer and a tapetum. Pollen mother cells formed different types ...
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ژورنال
عنوان ژورنال: South African Journal of Botany
سال: 2002
ISSN: 0254-6299
DOI: 10.1016/s0254-6299(15)30407-5