Physiological and biochemical analyses reveal drought tolerance in cool-season tall fescue (Festuca arundinacea) turf grass with the application of melatonin
Mohammad Nur Alam A B , Yanping Wang A and Zhulong Chan
A C D
+ Author Affiliations
- Author Affiliations
A Key Laboratory of Horticultural Plant Biology, Ministry of Education, and Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
B Agronomy Division, Bangladesh Wheat and Maize Research Institute, Nashipur, Dinajpur 5200, Bangladesh.
C College of Life Science and Technology, Hubei Engineering University, Xiaogan, Hubei 432000, China.
D Corresponding author. Email: zlchan@mail.hzau.edu.cn
Crop and Pasture Science 69(10) 1041-1049 https://doi.org/10.1071/CP18394
Submitted: 21 April 2018 Accepted: 29 August 2018 Published: 1 October 2018
Abstract
Tall fescue (Festuca arundinacea Schreb.) is a widely used, cool-season turf grass and is relatively sensitive to water stress. Melatonin has been reported to improve abiotic stress tolerance in many plants. In this study, we demonstrated that, although shoot height and fresh weight of tall fescue seedlings were significantly reduced by drought stress, they were increased by melatonin pre-treatment compared with control plants. Chemical analyses showed that tall fescue seedlings pre-treated with melatonin exhibited decreased levels of reactive oxygen species, electrolyte leakage and malondialdehyde, but higher levels of antioxidant enzyme activities (catalase, and peroxidase) and total chlorophyll content, compared with untreated seedlings. Leaf water loss was also partially mitigated and leaf water content increased by melatonin application, resulting in improved plant growth under drought stress. Moreover, root growth of tall fescue seedlings was promoted by melatonin under osmotic stress. The results show that drought tolerance was improved in cool-season tall fescue by application of exogenous melatonin. Therefore, melatonin may potentially be used as a protectant for plants against the deleterious effects of drought or water-deficit stress.
Additional keywords: hormone, oxidative stress, physiological metabolism.
References
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