期刊
PLANT SCIENCE
卷 323, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2022.111404
关键词
Abiotic stress; Drought tolerance; Transcription factor; Lignin; Oryza sativa; OsNAC17
资金
- New Breeding Technologies Development Program, Rural Development Administration, Republic of Korea [PJ01652501]
- Cooperative Research Program for Agriculture Science and Technology Development, Rural Development Administration, Republic of Korea [PJ01566801]
Land plants have developed a comprehensive system to cope with drought stress, and transcriptional regulation plays a crucial role. This study reveals that OsNAC17 transcription factor contributes to drought tolerance in rice by promoting lignin biosynthesis.
Land plants have developed a comprehensive system to cope with the drought stress, and it is operated by intricate signaling networks, including transcriptional regulation. Herein, we identified the function of OsNAC17, a member of NAC (NAM, ATAF, and CUC2) transcription factor family, in drought tolerance. OsNAC17 is localized to the nucleus, and its expression was significantly induced under drought conditions. A transactivation assay in yeast revealed that the OsNAC17 is a transcriptional activator, harboring an activation domain in the C -terminal region. Overexpressing (OsNAC17(OX)) transgenic plants showed drought-tolerant, and knock-out (OsNAC17(KO)) plants exhibited drought susceptible phenotype compared to non-transgenic plants. Further investigation revealed that OsNAC17 positively regulates several lignin biosynthetic genes and promotes lignin accumulation in leaves and roots. Together, our results show that OsNAC17 contributes to drought tolerance through lignin biosynthesis in rice.
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