珍汕97不育系和保持系水稻花粉发育过程中RNA含量变化的研究

采用组织化学方法，对珍汕９７水稻不育系及保持系的花粉发育过程进行分析，结果表明从幼小的单孢花粉到单核边位出现中央大液泡时期，不育系花粉细胞ＲＮＡ含量与保持系无显著差异，单核末期不育系开始败育，双核期ＲＮＡ含量与保持系双核期花粉细胞相比有显著下降，说明ＲＮＡ含量下降是珍汕９７不育系花粉败育的一个重要生理特征，不育系花粉在单核末期以前发育是正常的．

STUDIES ON CHANGES OF RNA CONTENT IN POLLEN CELLS FROM CMS RICE ZHENSHAN 97 DURING THE PROCESS OF ABORTION

Comparative studies were made in the RNA content in pollen cells of the cms Zhensan 97 rice (A) and its normal fertile counterport (B) at various developmental stages The results are as follows: there was no significant difference in the RNA content between A and B from the Small mononuclear pollen with nucleus in the center (without Vacuole) to the mononuclear pollen with the nucleus in one side (the big vacuole appeared in the cell). As for A, the pollen began to abort just before the dinucleate pollen stage. At the dinucleate pollen stage, the RNA content of B was much higher than that of A. The abnormal declining of the RNA content of A could be thought as one of the causes or results of the pollen abortion.