Effect of chilling and acclimation on the activity of glutamine synthetase isoforms in maize seedlings

被引：4

作者：

Simonovic, Ana D. ^{[1
,2
]}

Anderson, M. D. ^{[1
]}

机构：

[1] N Dakota State Univ, Dept Biol Sci, Fargo, ND 58105 USA

[2] Sinisa Stankov Inst Biol Res, Dept Plant Physiol, Belgrade 11060, Serbia

来源：

ARCHIVES OF BIOLOGICAL SCIENCES | 2007年 / 59卷 / 03期

关键词：

acclimation; chilling; glutamine synthetase; maize; oxidative stress; phosphate precipitation; PHOTOSYNTHETIC ELECTRON-TRANSPORT; MIXED-FUNCTION OXIDATION; ZEA-MAYS; ABSCISIC-ACID; DIFFERENT SENSITIVITIES; HYDROGEN-PEROXIDE; AMINO-ACIDS; EXPRESSION; STRESS; TOLERANCE;

D O I：

10.2298/ABS0703177S

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Effects of chilling and acclimation on the activity of cytosolic (GS 1) and plastidic (GS2) isoforms of glutamine synthetase (E.C. 6.3.1.2) were studied in chilling-sensitive and acclimation-responsive maize inbred G50. Glutamine synthetase activity in mesocotyls and roots of chilled (7 d/4 degrees C) and rewarmed (1 d/27 degrees C) etiolated plants was approximate to 1/3 that of controls. In coleoptiles+leaves of light-grown plants, GS1 was reduced to 75%, and GS2 to 50%. Acclimation (3 d/14 degrees C) increased GS activity and alleviated the effects of chilling. Exposure to H2O2 or menadione also reduced GS activity. Since chilling causes oxidative stress in maize, acclimation probably preserves GS activity by protecting GS from oxidative inactivation.

引用

页码：177 / 185

页数：9

共 43 条

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