光敏核不育水稻花粉败育中淀粉和蛋白质含量的研究(英文)

在可育花粉的发育中,功能叶同化产物运往花药合成淀粉和蛋白质,淀粉含量增加显著,颖壳和花药可溶性糖减少。长日下功能叶生理机能并未下降,糖也可运往颖花,但在颖壳中积累,不育花药中淀粉含量增加不明显,可溶性糖含量略有下降。单核晚期前可育花药蛋白质含量先是下降,但双核期后又迅速上升;不育花药中则基本上一直呈下降趋势。游离氨基酸总量与蛋白质含量变化相吻合,脯氨酸含量在可育和不育花粉之间差异不大。作者认为,淀粉和蛋白质的合成障碍是长日诱导光敏核不育水稻花粉败育的基本原因,这种障碍是由其底物供应不足引起的;游离氨基酸的变化与花粉败育仅有间接关系。

Studies on Starch and Protein Contents of HPGMR during Pollen Abortion

The results have shown that:(1)During the development of fertile anthers,soluble sugar in function leaves is translocated to anthers and the starch content increases significantly;the content of soluble sugar decreases continuously in both anthers and spikelets.The physiological function of leaves doesn't decline under long day condition,and soluble sug(?)r can also be transported to lemma and palea but seems to accumulate therein.The starch content increases only a little in sterile anthers,and the content of soluble sugar decreases slightly.(2)The content of soluble protein in fertile anthers deereases from the differen tiating stage of pollen mother cells to the late uninucleate stage,but increases markedly after the binucleate stage;in the sterile anthers,however,the protein content almost decreases continuously.The total content of free amino acids coincides well with that of protein under either LD or SD induction but there is no obiv-ious difference in any individual amino acid between sterile and fertile anthers.It can be considered that starch and protein synthesis inhibition is a basic cause in male sterility of HPGMR under long day induction,and only indirect relation may exist between free amino acid and pollen degeneration.