Indian Society of Genetics & Plant Breeding

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FOREIGN POLLEN TUBE GROWTH IN MAIZE AFTER CHEMICAL TREATMENTS

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In maize x sorghum and maize x pearl millet crosses, pollen germination and entry
of pollen tube in maize silk were normal. The foreign pollen tube grew only to a
few millimeter in length and did not reach embryo sac to allow fertilization. To
overcome this barrier, various treatments of chemical viz., 2, 4-D, GAJ and salicylic
acid were tried. Growth hormones mostly had favourable effect on pollen tube
growth, whereas, the immunosuppressant had inhibitory effect over the control. The
treatment of 2,4-D @ 100 ppm was found to be the best, which improved the foreign
pollen tube growth significantly over the control. The sorghum pollen tube growth
was better than that of pearl millet. Although certain chemical concentrations
improved the tube growth of sorghum and pearl millet, it was not sufficient for
the foreign pollen tubes to reach maize embryo sac.
 

Keywords: Zea mays, pollen tube growth, maize silk

Info

Year: 1999
Volume: 59
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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