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当前位置: 首页 > 文章 > 光周期对光敏核不育水稻小孢子发生和花粉发育的超微结构的影响 中国水稻科学 1993,7 (2) 65-70
Position: Home > Articles > Ultrastructural Changes in Microsporogenesis and Pollen Development of Photoperiod Sensitive Genic Male-sterile Rice under Different Day Length Chinese Journal of Rice Science 1993,7 (2) 65-70

光周期对光敏核不育水稻小孢子发生和花粉发育的超微结构的影响

作  者：
利容千;王建波;汪向明
单  位：
武汉大学
关键词：
光敏核不育水稻;光周期;花粉发育;超微结构
摘  要：
以光敏核不育水稻农垦58S为材料,在杭州中国水稻研究所人工气候箱(Koitotron S-153W)群中进行光周期处理。自秧苗6叶期开始,先经10h/d的短日照处理10d,到幼穗开始分化,然后分别在13、14h/d的光周期条件下发育。通过透射电镜观察探索光周期在决定花粉育性中的作用。结果发现,在13h/d光周期条件下,花粉发育正常:而在14h/d的光周期条件理、花粉在单核晚期败育、表现在核糖体呈聚合状态,内质网、质体、线粒体等细胞器逐渐解体、缺乏淀粉积累,吞噬泡增多,细胞质稀薄,最终变成不育。另一方面,绒毡层细胞保持完整状态,无解体迹象。
译  名：
Ultrastructural Changes in Microsporogenesis and Pollen Development of Photoperiod Sensitive Genic Male-sterile Rice under Different Day Length
作  者：
LI Rongqian, WANG Jianbo, WANG Xiangming(Wuhan University, Wuhan 430072)
关键词：
Photoperiod Sensitive Genie Male-sterile Rice(PGMR); Photoperiod; Pollen development; Ultrastructure
摘  要：
Hubei Photoperiod Sensitive Genic Male-sterile Rice Nongken 58S was treated with different photopcriod in phytotron chambers of Koitotron S—153W at China National Rice Research Institute, Hangzhou. The 6-lear old seedlings wcre exposed to short photoperiod of 10 h/d for 10d, and differentiation of the panicle proceeded under photoperiods of 13 and 14 h/d respcctively. Panicle primordia were fixed and scctioned for TEM examination to investigate the role of different photoperiods on pollen sterility. Under 13 h/d pollen formation was quite normal, but under 14 h/d most pollen grains aborted at the late uninucleate stage. The altrastructural abnormalities include: aggregation of the ribosomes: gradual disintegration of the endoplasmic reticula, plastids, mitochondria and other organelles; absence of starch accumulation: increase of phagocytic vacuoles; thinning of the cytoplasm etc. and eventually abortion of the pollen grains. On the other hand, the tapetum remained intact and no disintegration of tapctal cells happened.

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