Pollen bud formation and its role in Ophiorrhiza spp

The anther in Ophiorrhiza is dithecous and tetralocular, its development being of the dicotyledonous type. The anther wall comprises epidermis, endothecium, middle layer and secretory tapetum. The pollen grains are tricolpate and triporate. The microspore nucleus undergoes division to form a vegetat...

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Bibliographic Details
Published in:Annals of botany 1983-04, Vol.51 (4), p.449-452
Main Authors: Chennaveeraiah, M.S, Shivakumar, P.M
Format: Article
Language:English
Subjects:
Angiosperms
Anthers
Cellular differentiation
Embryology
Epidermis
Gametophytes
Microspores
Microsporogenesis
Ophiorrhiza harrisiana
Ophiorrhiza hirsutula
plant anatomy
plant morphology
Pollen
pollen buds
Pollen tubes
vegetative nucleus
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Summary:The anther in Ophiorrhiza is dithecous and tetralocular, its development being of the dicotyledonous type. The anther wall comprises epidermis, endothecium, middle layer and secretory tapetum. The pollen grains are tricolpate and triporate. The microspore nucleus undergoes division to form a vegetative nucleus and a generative nucleus and protrusions (pollen buds) are formed from the germ pores after the first division of the microspore nucleus. The vegetative nucleus moves into one of these buds or first breaks into a number of irregularly sized nuclear particles which enter into one, two or into all three buds, where they degenerate. Then the pollen buds are separated and the generative nucleus divides inside the pollen tube to form two sperms.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a086489