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 |
The pollen tube growth in wide crosses involving Arachis hypogeae (var VRI 2, TMV 7 and TMV 13) and wild Arachis sp. (Arachis stenosperma, Arachis cruziana and Arachis kempmercadoi) have been interpreted among nine crosses. The wide crosses were monitored for pollen attrition and pollen proliferation, being construed that greater levels of genetic distance trigger larger quantum of physiological and physical alterations at various levels of pistil growth. Pollen germination administered greater effect among wide crosses battling poor penetration of pollen tube in the transmitting tissue. The rate of pollen tube proliferation among wide crosses at different levels of pistils was found significant at initial level than at the later stages. The counts of pollen tubes growing down the style were recorded in all the treatment over different level of pistils. The pattern of reduction of tubes at different levels of pistils was very similar for all the crosses. The significantly higher level in proliferation of pollen tubes was noticed in the cross TMV 7 x Arachis stenosperma) as 39.50 per cent and is followed by the cross VRI 2 x Arachis kempmercadoi (35.25 per cent). The crosses, VRI 2 x Arachis stenosperma, TMV 13 x Arachis stenosperma and TMV 13 x Arachis cruziana exhibited significantly lower value of pollen tube proliferation at different levels of pistils. The failure of pollen tube to reach and fertilize the ovule is given by pollen attrition. Stylar attrition reported to be maximum in the cross VRI 2 x Arachis stenosperma while is low in the crosses, VRI 2 x Arachis kempfmercadoi, TMV 13 x Arachis kempfmercadoi and TMV 7 x Arachis stenosperma. It was evidenced that significant reduction in density of pollen tubes observed as they grow along the style. Also, the studies on genetic system of pollen pistil interaction construe more obvious in the upper part of the style than in the lower half delivering unique physical or physiological confronts impacting significant negative interaction over genetic systems of the gametophytes.
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