【摘要】 本文系统地研究了植物生长延缓剂 DPC 促进陆地棉品种棉铃发育的生理机理。结果表明:1.棉铃发育初期 DPC 提高了幼铃中细胞分裂素和脱落酸的含量。2.棉铃体积增大期 DPC 处理的棉铃具有较高的转化酶活性和较低的蔗糖水平,促进了同化产物的积累。3.DPC 处理提高了棉铃发育后期的乙烯释放量,促进了棉铃的成熟开裂,最终提高了铃重并对纤维的品质无不良影响。更多还原

【Abstract】 The effects of DPC(N,N—dimethyl piperidinium chloride)on endogenoushormone levels and the development of cotton(Gossypium hirsutum L.)bolls werestudied systemtically.Hormone balance was changed in DPC—treated bolls,the contents of CTK and ABA increased.Higher acid invertase activity and lower sucrose level were observed in treated bolls.DPC promoted the accumulation of dry matter in bolls and increased the bollweight.During the ripening and dehiscence of cotton bolls,the treatment producedmore ethylene,and higher ratio of boll dehiscence was observed in DPC—treatedplots.Fibre quility was not affected by DPC.The mechanism of DPC promoting boll development was discussed.更多还原