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An integrated transcriptome, metabolomic, and physiological investigation uncovered the underlying tolerance mechanisms of Monochoria korsakowii in response to acute/chronic cadmium exposure.
Xin, Jianpan; Li, Yan; Zhao, Chu; Ge, Wenjia; Tian, Runan.
Afiliación
  • Xin J; College of Architecture Landscape, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China.
  • Li Y; College of Architecture Landscape, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China.
  • Zhao C; College of Architecture Landscape, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China.
  • Ge W; College of Architecture Landscape, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China.
  • Tian R; College of Architecture Landscape, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China. Electronic address: tianrunan@njfu.edu.cn.
Plant Physiol Biochem ; 201: 107888, 2023 Aug.
Article en En | MEDLINE | ID: mdl-37442048
ABSTRACT
Identifying the physiological response and tolerance mechanism of wetland plants to heavy metal exposure can provide theoretical guidance for an early warning for acute metal pollution and metal-contaminated water phytoremediation. A hydroponic experiment was employed to investigate variations in the antioxidant enzyme activity, chlorophyll content, and photosynthesis in leaves of Monochoria korsakowii under 0.12 mM cadmium ion (Cd2+) acute (4 d) and chronic (21 d) exposure. Transcriptome and metabolome were analyzed to elucidate the underlying defensive strategies. The acute/chronic Cd2+ exposure decreased chlorophyll a and b contents, and disturbed photosynthesis in the leaves. The acute Cd2+ exposure increased catalase activity by 36.42%, while the chronic Cd2+ exposure markedly increased ascorbate peroxidase, superoxide dismutase, and glutathione peroxidase activities in the leaves. A total of 2 685 differentially expressed genes (DEGs) in the leaves were identified with the plants exposed to the acute/chronic Cd2+ contamination. In the acute Cd2+ exposure treatment, DEGs were preferentially enriched in the plant hormone transduction pathway, followed by phenylrpopanoid biosynthesis. However, the chronic Cd2+ exposure induced DEGs enriched in the biosynthesis of secondary metabolites pathway as priority. With acute/chronic Cd2+ exposure, a total of 157 and 227 differentially expressed metabolites were identified in the leaves. Conjoint transcriptome and metabolome analysis indicated the plant hormone signal transduction pathway and biosynthesis of secondary metabolites was preferentially activated by the acute and chronic Cd2+ exposure, respectively. The phenylpropanoid pathway functioned as a chemical defense, and the positive role of deoxyxylulose phosphate pathway in leaves against acute/chronic Cd2+ exposure was impaired.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cadmio / Transcriptoma Tipo de estudio: Guideline Idioma: En Revista: Plant Physiol Biochem Asunto de la revista: BIOQUIMICA / BOTANICA Año: 2023 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cadmio / Transcriptoma Tipo de estudio: Guideline Idioma: En Revista: Plant Physiol Biochem Asunto de la revista: BIOQUIMICA / BOTANICA Año: 2023 Tipo del documento: Article País de afiliación: China