Synergistic Effect of Melatonin and Selenium Improves Resistance to Postharvest Gray Mold Disease of Tomato Fruit

Frontiers in Plant Science

卷:13

Zhilin Wu¹  Jiaojiao Ma¹  Huawei Zang²  Xuebin Yin²  Renbin Zhu²  Zhi-Qing Lin³  Russel J. Reiter⁴  Linxi Yuan⁶  Gary S. Bañuelos⁸  Miao Li⁹ 

[1] Anhui Province Engineering Laboratory for Green Pesticide Development and Application, Anhui Province Key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agriculture University, Hefei, China;

[2] Anhui Province Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China;

[3] Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL, United States;

[4] Department of Cell Systems and Anatomy, The University of Texas Health Science Center at San Antonio, San Antonio, TX, United States;

[5] Department of Environmental Sciences, Southern Illinois University Edwardsville, Edwardsville, IL, United States;

[6] Department of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University, Suzhou, China;

[7] Key Laboratory of Functional Agriculture, Bio-Engineering Research Centre of Selenium, Suzhou Research Institute, University of Science and Technology of China, Suzhou, China;

[8] San Joaquin Valley Agricultural Sciences Center, United States Department of Agriculture – Agricultural Research Service, Parlier, CA, United States;

[9] The Central Area of Anhui Province Station for Integrative Agriculture, Research Institute of New Rural Development, Anhui Agricultural University, Hefei, China;

关键词: Se-Mel;    mineral nutrient;    Botrytis cinerea;    reactive oxygen species;    PR proteins;   

DOI  :  10.3389/fpls.2022.903936

来源: DOAJ

【 摘 要 】

Melatonin (MT) is a ubiquitous hormone molecule that is commonly distributed in nature. MT not only plays an important role in animals and humans but also has extensive functions in plants. Selenium (Se) is an essential micronutrient for animals and humans, and is a beneficial element in higher plants at low concentrations. Postharvest diseases caused by fungal pathogens lead to huge economic losses worldwide. In this study, tomato fruits were treated with an optimal sodium selenite (20 mg/L) and melatonin (10 μmol/L) 2 h and were stored for 7 days at room temperature simulating shelf life, and the synergistic effects of Se and MT collectively called Se-Mel on gray mold decay in tomato fruits by Botrytis cinerea was investigated. MT did not have antifungal activity against B. cinerea in vitro, while Se significantly inhibited gray mold development caused by B. cinerea in tomatoes. However, the interaction of MT and Se showed significant inhibition of the spread and growth of the disease, showing the highest control effect of 74.05%. The combination of MT with Se treatment enhanced the disease resistance of fruits by improving the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), as well as increasing the gene expression level of pathogenesis-related (PR) proteins. Altogether, our results indicate that the combination of MT and Se would induce the activation of antioxidant enzymes and increase the expression of PR proteins genes that might directly enhance the resistance in tomato fruit against postharvest pathogenic fungus B. cinerea.

【 授权许可】

Unknown