Maintenance of Normal Stress Tolerance in the Moss Physcomitrella patens Lacking Chloroplastic CuZn-Superoxide Dismutase

Yuya Higashi; Katsuaki Takechi; Hiroyoshi Takano; Susumu Takio

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Maintenance of Normal Stress Tolerance in the Moss Physcomitrella patens Lacking Chloroplastic CuZn-Superoxide Dismutase

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Superoxide dismutases (SODs) catalyze the dismutation of superoxide and play an important role in reducing oxidative stress in plants. Based on in-gel SOD activity staining, chloroplasts of the moss Physcomitrella patens have two CuZn-SODs as the major SOD isozymes and minor SODs, including a Fe-SOD and two Mn-SODs. To investigate the contribution of chloroplastic SODs to stress tolerance in P. patens, we generated a double mutant lacking chloroplastic CuZn-SOD genes. The mutant did not show any differences in comparison to the wild type based on the growth of protonemata on normal and high-salt media, extractable activities of the other SODs after culture on normal and high-salt media, and inhibition of Fv/Fm under stress conditions (high-salt, high-light, and high-temperature). These results indicate that chloroplastic CuZn-SODs do not play a principal role in oxidative stress tolerance in chloroplasts under the investigated conditions. These findings explain the previously reported unusual response of P. patens to copper deficiency, in which chloroplastic CuZn-SODs are preferentially inactivated but cytosolic CuZn-SODs are unaffected.

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《美国植物学期刊（英文）》|2015年第5期|591-601|共11页
作者
Yuya Higashi; Katsuaki Takechi; Hiroyoshi Takano; Susumu Takio;
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作者单位

Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan;

Center for Marine Environment Studies, Kumamoto University, Kumamoto, Japan;

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原文格式 PDF
正文语种 chi
中图分类肿瘤学;
关键词
Chloroplast; Knockout; Mutant; Physcomitrella; patens; Stress; Tolerance; Superoxide; Dismutase;
入库时间 2022-08-20 16:31:38

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1. Myosin VI.II Regulates Protonemal Patterning and Developmental Timing in the Moss Physcomitrella patens [J] . Shu-Zon Wu ,Julie A. Ritchie ,Ai-Hong Pan . 分子植物 . 2011,第005期
2. Heterologous expression of HpBHY and CrBKT increases heat tolerance in Physcomitrella patens [J] . Jianfang He ,Ping Li ,Heqiang Huo . 植物分类与资源学报 . 2019,第004期

Maintenance of Normal Stress Tolerance in the Moss Physcomitrella patens Lacking Chloroplastic CuZn-Superoxide Dismutase

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