Division of Free Nuclei in Rice Endosperm and Its Influencing Factors  

作　　者：LIU Man-xi WANG Zhong WU Xiao-mei CHEN Yi-fang GU Yun-jie 

机构地区：[1]Key Laboratory of Crop Genetics ＆ Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China

出　　处：《Rice science》2009年第2期131-137,共7页水稻科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.30471045 and No.30670125)

摘　　要：The division process of endosperm in rice and its influencing factors were investigated. Total dissection, resin embedding and sectioning under light and transmission electron microscopes were used to observe the division patterns of free nuclei and cytological characters of an endosperm. The various division patterns of free nuclei in rice endosperm included mitosis, amitosis, and the mitosis to amitosis change without an interphase. The division velocity of free nuclei in rice endosperm varied with the internucleus distance. Comparing to a cluster, the division velocity increased when the free nuclei were separated from each other. Moderately higher temperatures also enhanced the proliferation and shortened the division cycle of free nuclei in rice endosperm. To a certain extent, nitrogenous fertilizer applied at the booting stage together with a moderate drought treatment accelerated the division of free nuclei as well.The division process of endosperm in rice and its influencing factors were investigated. Total dissection, resin embedding and sectioning under light and transmission electron microscopes were used to observe the division patterns of free nuclei and cytological characters of an endosperm. The various division patterns of free nuclei in rice endosperm included mitosis, amitosis, and the mitosis to amitosis change without an interphase. The division velocity of free nuclei in rice endosperm varied with the internucleus distance. Comparing to a cluster, the division velocity increased when the free nuclei were separated from each other. Moderately higher temperatures also enhanced the proliferation and shortened the division cycle of free nuclei in rice endosperm. To a certain extent, nitrogenous fertilizer applied at the booting stage together with a moderate drought treatment accelerated the division of free nuclei as well.

关 键 词：RICE ENDOSPERM free nuclei division pattern CYTOLOGY water management nitrogen application temperature 

分 类 号：S511.01[农业科学—作物学] TQ323.8[化学工程—合成树脂塑料工业]