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Hexokinase gene OsHXK1 positively regulates leaf senescence in rice

Authors :
Shaoyan Zheng
Jingqin Lu
Di Yu
Jing Li
Hai Zhou
Dagang Jiang
Zhenlan Liu
Chuxiong Zhuang
Source :
BMC Plant Biology, Vol 21, Iss 1, Pp 1-15 (2021)
Publication Year :
2021
Publisher :
BMC, 2021.

Abstract

Abstract Background Leaf senescence is a highly complex and meticulous regulatory process, and the disruption of any factor involved in leaf senescence might lead to premature or delayed leaf senescence and thus result in reduced or increased crop yields. Despite sincere efforts by scientists, there remain many unsolved problems related to the regulatory factors and molecular mechanisms of leaf senescence. Results This study successfully revealed that OsHXK1 was highly expressed in senescent leaves of rice. The upregulation of OsHXK1 led to premature senescence of rice leaves, a decreased level of chlorophyll, and damage to the chloroplast structure. The overexpression of OsHXK1 resulted in increases in glucose and ROS levels and produced programmed cell death (PCD) signals earlier at the booting stage. Further analysis showed that expression level of the respiratory burst oxidase homolog (RBOH) genes and OsGLO1 were increased in OsHXK1-overexpressing plants at the booting stage. Conclusions Overall, the outcomes of this study suggested that OsHXK1 could act as a positive regulator of rice leaf senescence by mediating glucose accumulation and inducing an increase in ROS.

Details

Language :
English
ISSN :
14712229
Volume :
21
Issue :
1
Database :
Directory of Open Access Journals
Journal :
BMC Plant Biology
Publication Type :
Academic Journal
Accession number :
edsdoj.bc953ccbad44d9b8b72e010fce4169e
Document Type :
article
Full Text :
https://doi.org/10.1186/s12870-021-03343-5