Histo-cytological Analysis of Transport-transfer and Storage Systems in Developing Rice Ovaries

水稻卵巢发育中转运和储存系统的组织细胞学分析

• 批准号: 12460007
• 负责人: MATSUDA Toshiaki
• 金额: $ 8.83万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12460007/
• 关键词: Amyloplast; Electron microscope; High temperature; Imperfect grain; Quality; Reserve substance; Rice plant; Ripening; 不完全登熟; 胚乳; イネ; 高温; 食味; ストレス

The structure of the transport-transfer system and the sink system in developing rice ovaries were analyzed with histo-cytological methods especially with scanning electron microscope and the functions were discussed.1. Both the degeneration of nucellar epidermis (main transfer route) and the deposition of plug matrrials into the cells of nucellar projection (transfer route) were accelerated in developing ovaries at high temperature ripening.2. Both the structure and the mode of proliferation of plastid-amyloplast systems were changed to smaller size and abnormal anatomy in developing ovaries at high temperature ripening. The decomposition of amyloplast envelopes and starch grains was also investigated.3. These were the main causes brought about the decrease of grain thickness, the reduction of the density of starch accumulation, the increase of white-opaque grains and the deterioration of the taste of cooked rice.

本研究采用组织细胞学方法，特别是扫描电镜技术，对水稻子房发育过程中的运输-转运系统和库系统的结构进行了分析，并对其功能进行了探讨.高温成熟促进了子房发育过程中珠心表皮的退化（主要传递途径）和基质栓向珠心突起细胞的沉积（传递途径）.在高温成熟条件下，子房发育过程中，质体-造粉体系统的结构和增殖方式均发生了变化，其体积变小，解剖结构异常。研究了淀粉体被膜和淀粉粒的分解.这是造成稻米粒厚减小、淀粉积累密度降低、白浊粒增多、米饭食味变差的主要原因。