Author(s): A. B.MANDAL

Abstract: A study was made on the incompatibility mechanism of pollen for boron resistant genotype and on the sty/ar tissues of boron susceptible genotypes and its method of overcoming in bread wheat (Triticum aestivum). The results indicated that pollen of boron resistant genotype germinated on the stigmata of boron susceptible genotype, the pollen tube came across the stigmatic pathway but did not proceed farther and thus its growth was restricted to the stigma. When boron was sprayed on the florets of susceptible one at 48 hours before pollination and pollinated by the pollen of boron resistant one there was no problem of tube growth of resistant one through the style and so on and ultimately grain formation took place by success.fa/ over fertilization. Thus boron is the medium for success.fa/ way of overcoming the sty/ar incompatibility of boron susceptible genotypes.

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