Pollen Studies in Coconut (Cocos Nucifera L.) with Special Reference to a Sampling Procedure
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2007-02
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The pollen studies of cultivated plants as a whole have attracted the attention of research workers in recent years, owing to its great significance in floral biology and its index value in interpreting taxonomic relationships and the hybridity status of cultivars (Nair, 1968). The pollen-grains of coconut (Cocos nucifera L.) were studied by Nair and Sharma (1963) and GangoJly et al. (1961), and the pollen-grains of arecanut [Areca catechu L.) were studied byRaghavan and Baruah (1956) and Nair (1965). Nair and Sharma (1963) reported the occurrence of pollen variations, viz. the trichotomo-colpate, porate and operculate forms, apart from the 1-furrowed ones, in coconut. They suggested that a statistical analysis of these pollen variations would be useful in determining the interrelationship of 8 varieties of coconut studied by them. The present study is aimed at formulating a satisfactory sampling procedure for the determination of pollen sterility and pollen germination, to evaluate the reliability of using the universally employed stains triphenyl tetrazolium chloride and acetocarmine in determining pollen sterility, and to ascertain the correlation between pollen sterility and pollen germination.
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Indian J.Agrl.Sci. 1970 v-40 i-5 p-457-460