Ecology, Environment and Conservation Paper

Vol 22, Issue 4, 2016; Page No.(1875-1884)

POLLINATION STRATEGY OF POLLINATORS IN ASCLEPIADOIDAE OF APOCYNACEAE

T.M. Ramakrishna, M. Jayashankar and S. Ramakrishna

Abstract

The asclepiads and orchids have common features to share, especially in complex organization of flowers, pollen in pollinial sacs, receptive stigmatic surface located in the stigmatic complex formed by the union of stigma and antheridia. The location of germination sites pollinia related to pollination is highlighted. More so, the flowers are adapted to entomophilous pollination. The present article describes the flower structure of tribes Asclepiadeae, Marsdeniae, Gonolobae and Stapeliae and the pollinator behavior while collecting the nectar in different types of flowers. The complexity of flower, associated with the position of nectar and pollinia - three distinct groups are formed: flowers open and nectar concealed, flowers open and nectar not concealed, flowers tubular and nectar protected. The nectar presence and its proximity to the complex gynostegium are two important things that decides the type of pollinator in pollination of the sub family Asclepiadoidae of Apoc

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