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AabHLH112, a bHLH transcription factor, positively regulates sesquiterpenes biosynthesis in . | LitMetric

AabHLH112, a bHLH transcription factor, positively regulates sesquiterpenes biosynthesis in .

Front Plant Sci

Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, Tibet Agriculture and Animal Husbandry College and Southwest University (TAAHC-SWU) Medicinal Plant Joint R&D Centre, School of Life Sciences, Southwest University, Chongqing, China.

Published: September 2022

AI Article Synopsis

Article Abstract

The bHLH transcription factors play important roles in the regulation of plant growth, development, and secondary metabolism. β-Caryophyllene, -cedrol, and β-farnesene, three kinds of sesquiterpenes mainly found in plants, are widely used as spice in the food industry and biological pesticides in agricultural production. Furthermore, they also have a significant value in the pharmaceutical industry. However, there is currently a lack of knowledge on the function of bHLH family TFs in β-caryophyllene, -cedrol, and β-farnesene biosynthesis. Here, we found that AabHLH112 transcription factor had a novel function to positively regulate β-carophyllene, -cedrol, and β-farnesene biosynthesis in . Exogenous MeJA enhanced the expression of and genes of β-caryophyllene synthase (), cedrol synthase (), and β-farnesene synthase (), as well as sesquiterpenes content. Dual-LUC assay showed the activation of , and promoters were enhanced by AabHLH112. Yeast one-hybrid assay showed AabHLH112 could bind to the G-box (CANNTG) -element in promoters of both and In addition, overexpression of in significantly elevated the expression levels of , , and as well as the contents of β-caryophyllene, -cedrol, and β-farnesene, while suppressing expression by RNAi reduced the expression of the three genes and the contents of the three sesquiterpenes. These results suggested that is a positive regulator of β-caryophyllene, -cedrol, and β-farnesene biosynthesis in .

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9478121PMC
http://dx.doi.org/10.3389/fpls.2022.973591DOI Listing

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