National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Oenothera biennis L., commonly known as Evening Primrose as flowers open in the evening. Inflorescence is racemose (spike) and flowering continues for about 3 months. Circular floral nectary of translucent colour are present at the point of attachment of petals and hypanthium. Pollen are triporate, of variable sizes held together by viscin threads. Sepals colour change from green to yellowish green, act as indicator of anther dehiscene in the morning in closed conditions and anthesis in the evening. Flower is protandrous. The stigmatic lobes remain compact above the anthers till anthesis. Stigma radiates and turns receptive at the time of anthesis on the same day in the evening and remains so till next day afternoon. Anthesis completes with in 15 minutes i.e. from closed bud to full bloom. The species is both self and cross pollinated but mostly cross pollinated and is carried out by insects during both day and night. It is both cross as well as self-compatible.
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