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Deciphering the physiological and molecular mechanisms for copper tolerance in autotetraploid Arabidopsis.
Li, Mingjuan; Xu, Guoyun; Xia, Xinjie; Wang, Manling; Yin, Xuming; Zhang, Bin; Zhang, Xin; Cui, Yanchun.
Afiliación
  • Li M; Key Laboratory for Agro-ecological Process in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
  • Xu G; University of the Chinese Academy of Sciences, Beijing, 100049, China.
  • Xia X; Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, 450001, China.
  • Wang M; Key Laboratory for Agro-ecological Process in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
  • Yin X; Key Laboratory for Agro-ecological Process in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
  • Zhang B; Key Laboratory for Agro-ecological Process in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
  • Zhang X; Key Laboratory for Agro-ecological Process in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
  • Cui Y; University of the Chinese Academy of Sciences, Beijing, 100049, China.
Plant Cell Rep ; 36(10): 1585-1597, 2017 Oct.
Article en En | MEDLINE | ID: mdl-28685360
KEY MESSAGE: Autotetraploid Arabidopsis line esd and 4COL exhibit enhanced tolerance to Cu stress by enhancing activation of antioxidative defenses, altering expression of genes related to Cu transport, chelation, and ABA-responsive. Autopolyploidy is ubiquitous among angiosperms and often results in better adaptation to stress conditions. Although copper (Cu) is an essential trace element, excess amounts can inhibit plant growth and even result in death. Here, we report that autotetraploid Arabidopsis thaliana esd and 4COL exhibit higher tolerance to Cu stress. Under such conditions, tetraploid plants had lower Cu contents and significantly more biomass compared with diploid plants. When exposed to excess Cu for 24 h, levels of superoxide anions, hydrogen peroxide, and malondialdehyde were lower in tetraploids than in diploids. Moreover, activities of the antioxidant enzymes superoxide dismutase and peroxidase were stimulated and glutathione content was maintained at a relative higher level in the tetraploids. The expression of genes related to Cu transport and chelation was altered in autotetraploid Arabidopsis under Cu stress, and several key genes involved in the response to abscisic acid (ABA) were significantly up-regulated. Our results indicate that tetraploid Arabidopsis esd and 4COL acquire improved tolerance to Cu stress through enhanced activation of antioxidative defense mechanisms, altered expression of genes related to Cu transport and chelation, and positive regulation of expression for ABA-responsive genes.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / Adaptación Fisiológica / Arabidopsis / Cobre / Tetraploidía Idioma: En Revista: Plant Cell Rep Asunto de la revista: BOTANICA Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / Adaptación Fisiológica / Arabidopsis / Cobre / Tetraploidía Idioma: En Revista: Plant Cell Rep Asunto de la revista: BOTANICA Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania