<FONT face="Verdana">Effects of High Temperature on Key Enzyme  Activities of Nitrogen Metabolism and Protein Content During Rice Grain Filling</FONT>

LIANG Cheng-gang, CHEN  Li-ping,WANG Yan,LIU  Jia,XU Guang-li,LI  Tian*

doi:10.3969/j.issn.1001-7216.2010.04.011

2010 , Vol. 24 >Issue 4: 398 - 402

DOI: https://doi.org/10.3969/j.issn.1001-7216.2010.04.011

研究报告

Effects of High Temperature on Key Enzyme Activities of Nitrogen Metabolism and Protein Content During Rice Grain Filling

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Agronomy College, Sichuan Agricultural University, Ya’an 625014, China; *Corresponding author, E-mail: lghhlt@hotmail.com

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2010-07-10

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Abstract

The japonica rice variety Koshihikari and indica rice variety IR72 were used to research the effects of high temperature on the activities of glutamine synthetase(GS), glutamate synthase(GOGAT), glutamic oxaloacetic transaminase(GOT), glutamate pyruvate transaminase(GPT), and the contents of protein and amino acids in grains during rice grain filling. The average activities of GOGAT, GOT and GPT in grains significantly increased under high temperature during rice grain filling, while the activity of GS significantly decreased. And the contents of protein and amino acids constituents in grains significantly increased. The significant decrease of GS activity in grains under high temperature did not influence the synthesis of protein, so it is presumed that GS in rice grains was not the key enzyme to restrain the synthesis of protein.

Key words： high temperature; nitrogen metabolism; key enzyme; protein content; amino acids composition

Cite this article

LIANG Cheng-gang, CHEN Li-ping,WANG Yan,LIU Jia,XU Guang-li,LI Tian* . Effects of High Temperature on Key Enzyme Activities of Nitrogen Metabolism and Protein Content During Rice Grain Filling[J]. Chinese Journal OF Rice Science, 2010 , 24(4) : 398 -402 . DOI: 10.3969/j.issn.1001-7216.2010.04.011

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