棉花洞A型核雄性不育系花药败育过程中的生化变化

研究了陆地棉洞A型核雄性不育系(抗A1，MA)不育和可育花药不同发育时期可溶性碳水化合物、游离氨基酸和IAA、GA3、ABA含量的动态变化。结果表明，不育花药中可溶性糖含量偏高，缺乏淀粉积累；有4种游离氨基酸含量在可育与不育花药问存在显著差异，其中不育花药天门冬氨酸含量偏高，这可能是其败育的原因之一，而脯氨酸、精氨酸、苯丙氨酸含量异常，则是不育花药败育的结果；在花药主要败育时期之前，不育花药中ABA含量极显著偏高，IAA、GA3含量极显著偏低。不育花药中IAA、GA3、ABA含量变化与洞A型核雄性不育系花药败育密切相关。

Biochemical changes in anthers of "Dong A" genetic male sterile lines of cotton

Carbohydrates, free amino acids, IAA, GA_3 and ABA contents in anthers of different stages of Dong A recessive genetic male sterile lines (Kang A_1, MA)were measured. Less starch accumulation and abnormal contents of 4 free amino acids were detected in sterile anchers. The sterile anthers had higher contents of aspartic acid and lower contents of proline , agrinine and phenylalanine than that of fertile anthers. Markerly higher ABA content, lower IAA and GA_3 contents than the fertile anthers were also detected in all four anther development stages. Abnormal contents of Carbohydrates ,free amino acids and Phytohomones may be associated with the pollen abortion.