%0 Journal Article
%T Changes of Glutamine Synthetase and Other Ammonia-Assimilating Enzymes during the Germination of the Seed and the Development of the Cotyledon in Cushaw
南瓜种子萌发及子叶发育时谷氨酰胺合成酶和其它氨同化酶的变化
%A WEI Guo Wei
%A LIN Qing Hua
%A ZHANG Chu Fu
%A YUAN Yong Ze
%A WANG Qi Hai
%A
魏国威
%A 林清华
%A 张楚富
%A 袁永泽
%A 王其海
%J 植物科学学报
%D 2002
%I
%X The change of glutamine synthetase (GS) isoform was determined by Native PAGE and the activity staining as well as Western blotting. The activity changes of GS, NADH dependent glutamate synthase (NADH GOGAT), and NADH dependent glutamate dehydrogenase (NADH GDH) were also analyzed by enzyme assay. The results indicateded that only one form of GS isozyme was detected during the germination of cushaw seed and the different development stages of the cotyledon grown in light or in darkness. GS activity was increaseed with the germination of the seed untill the cotyledon to begin green and then was reduced gradually. The tendency of the activity change of NADH GOGAT was similar to GS. The activity change of NADH GDH was contrary to that of GS and NADH GOGAT. The results suggested that the expression of GS isoform was not effected by the treatments of light and darkness in the experiment conditions. GS/GOGAT cycle may play a main role for assimilating ammonium during the germination of the seeds and the initial stage of the cotyledon development, and the cycle was weaken and GDH pathway was strengthened after the green of the cotyledon by comparing these enzyme activities.
%K Development
%K Glutamine synthetase
%K Glutamate synthase
%K Glutamate dehydrogenase
%K Isozyme
%K Cushaw(Cucurbita moschata
南瓜
%K 种子萌发
%K 子叶发育
%K 谷氨酰胺合成酶
%K 氨同化酶
%K 植物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=9973DE552EA54506F7AABD4780345ED2&aid=F785C5B886525B16&yid=C3ACC247184A22C1&vid=A04140E723CB732E&iid=38B194292C032A66&sid=FBCA02DBD05BD4EA&eid=C812B90E96151014&journal_id=1000-470X&journal_name=武汉植物学研究&referenced_num=3&reference_num=16