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Volume 13
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10.3390/plants13040475
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Article

Hydrogen Peroxide Promotes Tomato Leaf Senescence by Regulating Antioxidant System and Hydrogen Sulfide Metabolism

by
Yue Yu
1,†,
Siyue Wang
1,†,
Wentong Guo
1,
Meihui Geng
1,
Ying Sun
1,
Wanjie Li
2,
Gaifang Yao
1,
Danfeng Zhang
1,
Hua Zhang
1,* and
Kangdi Hu
1,*
1
School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
2
Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, College of Life Science, Beijing Normal University, Beijing 100875, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Plants 2024, 13(4), 475; https://doi.org/10.3390/plants13040475
Submission received: 21 December 2023 / Revised: 21 January 2024 / Accepted: 5 February 2024 / Published: 7 February 2024
(This article belongs to the Special Issue Gasotransmitters in Plants: Physiological Functions and Potential Applications)
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Abstract

Hydrogen peroxide (H2O2) is relatively stable among ROS (reactive oxygen species) and could act as a signal in plant cells. In the present work, detached tomato leaves were treated with exogenous H2O2 at 10 mmol/L for 8 h to study the mechanism of how H2O2 regulates leaf senescence. The data indicated that H2O2 treatment significantly accelerated the degradation of chlorophyll and led to the upregulation of the expression of leaf senescence-related genes (NYC1, PAO, PPH, SGR1, SAG12 and SAG15) during leaf senescence. H2O2 treatment also induced the accumulation of H2O2 and malondialdehyde (MDA), decreased POD and SOD enzyme activities and inhibited H2S production by reducing the expression of LCD1/2 and DCD1/2. A correlation analysis indicated that H2O2 was significantly and negatively correlated with chlorophyll, the expression of leaf senescence−related genes, and LCD1/2 and DCD1/2. The principal component analysis (PCA) results show that H2S showed the highest load value followed by O2•−, H2O2, DCD1, SAG15, etc. Therefore, these findings provide a basis for studying the role of H2O2 in regulating detached tomato leaf senescence and demonstrated that H2O2 plays a positive role in the senescence of detached leaves by repressing antioxidant enzymes and H2S production.
Keywords: tomato; hydrogen peroxide; leaf senescence; antioxidant system; hydrogen sulfide tomato; hydrogen peroxide; leaf senescence; antioxidant system; hydrogen sulfide

Share and Cite

MDPI and ACS Style

Yu, Y.; Wang, S.; Guo, W.; Geng, M.; Sun, Y.; Li, W.; Yao, G.; Zhang, D.; Zhang, H.; Hu, K. Hydrogen Peroxide Promotes Tomato Leaf Senescence by Regulating Antioxidant System and Hydrogen Sulfide Metabolism. Plants 2024, 13, 475. https://doi.org/10.3390/plants13040475

AMA Style

Yu Y, Wang S, Guo W, Geng M, Sun Y, Li W, Yao G, Zhang D, Zhang H, Hu K. Hydrogen Peroxide Promotes Tomato Leaf Senescence by Regulating Antioxidant System and Hydrogen Sulfide Metabolism. Plants. 2024; 13(4):475. https://doi.org/10.3390/plants13040475

Chicago/Turabian Style

Yu, Yue, Siyue Wang, Wentong Guo, Meihui Geng, Ying Sun, Wanjie Li, Gaifang Yao, Danfeng Zhang, Hua Zhang, and Kangdi Hu. 2024. "Hydrogen Peroxide Promotes Tomato Leaf Senescence by Regulating Antioxidant System and Hydrogen Sulfide Metabolism" Plants 13, no. 4: 475. https://doi.org/10.3390/plants13040475

APA Style

Yu, Y., Wang, S., Guo, W., Geng, M., Sun, Y., Li, W., Yao, G., Zhang, D., Zhang, H., & Hu, K. (2024). Hydrogen Peroxide Promotes Tomato Leaf Senescence by Regulating Antioxidant System and Hydrogen Sulfide Metabolism. Plants, 13(4), 475. https://doi.org/10.3390/plants13040475

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