Simultaneous expression of choline oxidase, superoxide dismutase and ascorbate peroxidase in potato plant chloroplasts provides synergistically enhanced protection against various abiotic stresses

被引：68

作者：

Ahmad, Raza ^{[1
,4
]}

Kim, Yun-Hee ^{[1
]}

Kim, Myoung-Duck ^{[1
]}

Kwon, Suk-Yoon ^{[2
]}

Cho, Kwangsoo ^{[3
]}

Lee, Haeng-Soon ^{[1
]}

Kwak, Sang-Soo ^{[1
]}

机构：

[1] KRIBB, Environm Biotechnol Res Ctr, Taejon 305806, South Korea

[2] KRIBB, Plant Genom Res Ctr, Taejon 305806, South Korea

[3] RDA, Natl Inst Crop Sci, Highland Agr Res Ctr, Pyeongchang 232955, Gangwon, South Korea

[4] COMSATS Inst Informat Technol, Dept Environm Sci, Abbottabad 22060, Pakistan

来源：

PHYSIOLOGIA PLANTARUM | 2010年 / 138卷 / 04期

关键词：

TRANSGENIC TOBACCO PLANTS; GLYCINE BETAINE; SALT TOLERANCE; OXIDATIVE STRESS; CODA GENE; DROUGHT TOLERANCE; OXYGEN RADICALS; SWEET-POTATO; PHOTOINHIBITION; TRANSFORMATION;

D O I：

10.1111/j.1399-3054.2010.01348.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Plants synthesize compatible solutes such as glycinebetaine (GB) in response to abiotic stresses. To evaluate the synergistic and protective effect of GB, transgenic potato plants expressing superoxide dismutase (SOD) and ascorbate peroxidase (APX) targeting to chloroplasts (referred to as SSA plants) were retransformed with a bacterial choline oxidase (codA) gene to synthesize GB in chloroplast in naturally occurring non-accumulator potato plants (including SSA) under the control of the stress-inducible SWPA2 promoter (referred to as SSAC plants). GB accumulation resulted in enhanced protection of these SSAC plants and lower levels of H2O2 compared with SSA and non-transgenic (NT) plants after methyl viologen (MV)-mediated oxidative stress. Additionally, SSAC plants demonstrated synergistically enhanced tolerance to salt and drought stresses at the whole-plant level. GB accumulation in SSAC plants helped to maintain higher activities of SOD, APX and catalase following oxidative, salt and drought stress treatments than is observed in SSA and NT plants. Conclusively, GB accumulation in SSAC plants along with overexpression of antioxidant genes rendered the plants tolerant to multiple environmental stresses in a synergistic fashion.

引用

页码：520 / 533

页数：14

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