|Table of Contents|

Effect of UV-B Stress on Photorespiration in Soybean Seedlings(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年03期
Page:
447-450
Research Field:
Publishing date:

Info

Title:
Effect of UV-B Stress on Photorespiration in Soybean Seedlings
Author(s):
DAI Hao1ZHOU Qing12
1 Laboratory of Environmental Science,School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122,Jiangsu;
2Key Laboratory of Industrial Biotechnology,Ministry of Education,Jiangnan University,Wuxi 214122,Jiangsu,China
Keywords:
UV-B radiationSoybean seedlingsPhotorespiration rate
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2008.03.0447
Abstract:
As an important problem affecting agricultural productivity,ecological effect of UV-B radiation on crop seeds germination is highly concerned by researchers at domestic and abroad.To study the effect of UV-B radiation stress on photorespiration(Pr),photosynthesis(Pn),and the key enzyme of glycolate oxidase(GO)and glutamine synthetase(GS)in soybean seedlings.Soybean seedlings were exposed to two levels of ultraviolet-B radiation(UV-B,280~320 nm) under laboratory hydroponics conditions.Three ultraviolet radiant intensity treatment of 0(CK),0.15 W.m-2(T1) and 0.45 W.m-2(T2)were exposed when the third euphylla of the soybean seedlings was expanded.Each treatment was irradiated six hours every day(9:00~15:00) and lasted for five days,then recoveried for ten days.Results showed that when seedlings were intimidated by UV-B,the key enzymes of photorespiration as glycolate oxidase and glutamine synthetase were effectively increased,so as photorespiration rate,while photosynthetic rate was effectively decreased,speculating the increasing of glycolate oxidase and glutamine synthetase led to the increasing of photorespiration rate.Obvious dosage effect was lied among UV-B radiation and glycolate oxidase and glutamine synthetase.Results suggest that the photorespiration rate could be regulated by key enzyme of photorespiration when under UV-B radiation stress.

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Last Update: 2014-10-08