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温敏核不育小麦可育与不育花粉超微结构观察结果显示:可育花粉小孢子分裂形成二胞花粉后,营养细胞中的大液泡形成一些单膜小液泡,导致大液泡体积减小,然后通过增加液泡内含物,使大液泡转变为细胞质基质。伴随着营养细胞大液泡消失,细胞质中开始积累淀粉粒并逐渐增加。不育花粉在小孢子分裂之前发育正常,但在形成的二胞花粉中出现异常,营养细胞中有自体吞嗜泡形成并融入到大液泡中,结果大液泡不消失,细胞质基质不增加,营养细胞中没有积累淀粉粒,最终花粉败育。该种小麦雄性不育花粉败育时间和败育结构特征的确定为进一步深入研究其花粉败育机制打下基础。
The ultrastructural observation of fertile and sterile pollen in thermo-sensitive genic male sterile wheat showed that after the microspores of fertile pollen split into two pollen, the large vacuoles in vegetative cells formed some single vacuoles, resulting in the decrease of the size of large vacuoles , And then turn the large vacuoles into cytoplasmic matrices by adding vacuolar inclusions. With the disappearance of vegetative vacuoles, cytoplasm began to accumulate starch grains and gradually increased. Infertility pollen developed normally before microspore division, but appeared abnormal in the formed diploid pollen. The autotrophic vesicles formed in the vegetative cells and integrated into the large vacuoles. As a result, the large vacuoles did not disappear, and the cytoplasm did not increase. The nutrition No accumulation of starch granules in the cells, the final pollen abortion. The determination of the abortion time and the abortion structure of male sterile pollen in this kind of wheat lay the foundation for further research on the mechanism of pollen abortion.