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Exogenous citric acid enhances drought tolerance in tobacco (Nicotiana tabacum).
Xie, H; Bai, G; Lu, P; Li, H; Fei, M; Xiao, B-G; Chen, X-J; Tong, Z-J; Wang, Z-Y; Yang, D-H.
Afiliación
  • Xie H; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Bai G; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Lu P; Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang, China.
  • Li H; Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang, China.
  • Fei M; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Xiao BG; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Chen XJ; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Tong ZJ; Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China.
  • Wang ZY; Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang, China.
  • Yang DH; Zhanjiang Sugarcane Research Center, Guangzhou Sugarcane Industry Research Institute, Zhanjiang, China.
Plant Biol (Stuttg) ; 24(2): 333-343, 2022 Mar.
Article en En | MEDLINE | ID: mdl-34879179
Organic acids play a pivotal role in improving plant response to long-term drought stress. External application of organic acids has been reported to improve drought resistance in several species. However, whether organic acids have similar effects in tobacco remains unknown. A screening study of the protective function of organic acids in tobacco and understanding the underlying molecular mechanism would be useful in developing a strategy for drought tolerance. Several physiological and molecular adaptations to drought including abscisic acid, stomatal closure, reactive oxygen species homeostasis, amino acid accumulation, and drought-responsive gene expression were observed by exogenous citric acid in tobacco plants. Exogenous application of 50 mm citric acid to tobacco plants resulted in higher chlorophyll content, net photosynthesis, relative water content, abscisic acid content and lower stomatal conductance, transpiration and water loss under drought conditions. Moreover, reactive oxygen species homeostasis was better maintained through increasing activity of antioxidant enzymes and decreasing hydrogen peroxide content after citric acid pretreatment under drought. Amino acids involved in the TCA cycle accumulated after external application of citric acid under drought stress. Furthermore, several drought stress-responsive genes also dramatically changed after application of citric acid. These data support the idea that external application of citric acid enhances drought resistance by affecting physiological and molecular regulation in tobacco. This study provides clear insights into mechanistic details of regulation of amino acid and stress-responsive gene expression by citric acid in tobacco in response to drought, which is promising for minimizing growth inhibition in agricultural fields.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nicotiana / Sequías Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nicotiana / Sequías Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido