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2. NtCOMT1 responsible for phytomelatonin biosynthesis confers drought tolerance in Nicotiana tabacum

Author

Zhengping Yao, Xue Zhang, Yingchong Liang, Jiemei Zhang, Yi Xu, Suiyun Chen, and Dake Zhao

Subjects
China, Plant Science, General Medicine, Horticulture, Plants, Genetically Modified, Biochemistry, Droughts, Gene Expression Regulation, Plant, Stress, Physiological, Tobacco, Molecular Biology, Phylogeny, Melatonin, Plant Proteins
Abstract

Nicotiana tabacum (tobacco) is one of the most important industrial crops and its productivity is vulnerable to drought, particularly in Yunnan province, China due to the long water-deficit spring. Here, we aimed at identifying caffeic acid O-methyltransferase (COMT) in melatonin biosynthesis to provide genetic resources against drought tolerance of tobacco. The integration of the genome-wide identification, phylogenetic relationships, and conserved domain/motif analysis revealed that NtCOMT1 could be the probable functional COMT homolog for melatonin production. In vitro enzyme activity test approved that NtCOMT1 enabled the conversion of N-acetylserotonin into melatonin, occurring both in the cytoplasm and nucleus by subcellular localization analysis. The K

Published
2022

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