Epigenetic Regulation of the Phytohormone Abscisic Acid Accumulation under Dehydration Stress during Postharvest Processing of Tea (Camellia sinensis)

被引：30

作者：

Gu, Dachuan ^{[1
,2
,3
]}

Yang, Jie ^{[1
,2
]}

Wu, Shuhua ^{[1
,2
,4
]}

Liao, Yinyin ^{[1
,2
,4
]}

Zeng, Lanting ^{[1
,2
,3
]}

Yang, Ziyin ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, Guangzhou 510650, Peoples R China

[2] Chinese Acad Sci, Key Lab South China Agr Plant Mol Anal & Genet Im, Guangzhou 510650, Peoples R China

[3] Chinese Acad Sci, Ctr Econ Bot, Core Bot Gardens, Guangzhou 510650, Peoples R China

[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2021年 / 69卷 / 03期

关键词：

ABA biosynthesis; dehydration stress; DNA methylation; histone modifications; tea processing;

D O I：

10.1021/acs.jafc.0c07220

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The plant hormone abscisic acid (ABA) accumulates in tea leaves under dehydration stress during the withering process. However, the mechanism underlying ABA biosynthesis regulation remains largely unclear. In the present study, we found increased expression of ABA biosynthesis genes under dehydration stress during postharvest processing of tea. Furthermore, dehydration stress promoted ABA accumulation by increasing histone acetylation of ABA anabolism genes but by decreasing the levels of histone H3 lysine 9 dimethylation and DNA methylation of ABA biosynthesis genes. We screened candidate regulators of histone deacetylation and DNA methylation under dehydration stress. Taken together, our results indicate a role for epigenetic modifications during postharvest processing of tea.

引用

页码：1039 / 1048

页数：10

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