期刊论文

Xiao, L.-T.

中文

植物生理与分子生物学学报

1671-3877

2014

50

12

1840-1844

10.13592/j.cnki.ppj.2014.0344

30900874:国家自然科学基金 11JJ3026:湖南省自然科学基金 13B052:湖南省教育厅优秀青年项目 ZWKF201301:作物学开放基金项目

本校为第一且通讯机构

以耐热性不同的两个水稻品系为材料，研究了高温胁迫对胚乳淀粉合成关键酶活性及内源激素含量的影响。结果表明，高温胁迫下胚乳ADPG焦磷酸化酶活性(AGPase)、可溶性淀粉合成酶(SSS)和淀粉分支酶(SBE)活性升高，到达峰值后下降。耐热品系996胚乳淀粉合成酶类活性的下降幅度小于热敏感品系4628。高温下淀粉积累速率与AGPase、SSS活性显著相关。高温下胚乳中ABA含量升高， IAA含量和Z+ZR含量降低，热敏感品系4628胚乳中内源激素含量变化幅度均大于耐热品系996。

The experiment was carried out in growth chamber to investigate the effect of high temperature on the activities of the key enzymes associated with starch synthesis and hormone contents in endosperm of two rice (Oryza sativa) lines including the heat-tolerant line 996 and heat-sensitive line 4628. The results showed that AGPase, SSS and SBE enzyme activities increased under high temperature stress, then decreased after the period of the peak, the decreasing extent in heat resistant line 996 was lower than that in heat sensitive line 4628. There...