植物激素对棉属(Gossypium)远缘杂种胚囊发育的影响

THE EFFECT OF PHYTOHORMONES ON THE EMBRYO SAC DEVELOPMENT OF GOSSYPIUM HYBRIDS

在棉属远缘杂种低世代植株的生长、发育过程中,喷3-4次激素,对促进胚囊正常发育有良好的作用。试验中用GA3、NAA、IAA、BR和ABA等5种激素单施和配合施用,处理两个杂交组合。施用40ppm GA3和100ppm NAA的两种处理对提高远缘杂种植株的正常胚囊数、结铃率和单铃种子数都有良好的效果,0.05-0.1ppm BR处理不同组合,效果不一致。2ppm ABA和300ppmIAA两个处理尚需进一步试验。

Two interspecific hybrid combinations of Gossypium were treated with phytohormon-es, including GA3, NAA, IAA, BR and ABA. It was found that treating hybrid plants oflow generation 3-4 times during the time of growth could facilitate the normal developm-ent of the hybrid embryo sac. hybrid plants treated with 40ppm GA_3 and 100ppm NAAproduced costantly higher proportions of normal embryo sac, bollbearing and seeds per boll,while different hybrids responded differently to the treatment of BR from 0.05 to 0.1ppm.Nevertheless, further verification is needed as to the effects of 2 ppm ABA and 300ppmIAA.