Amelioration of Hypothermia-Induced Damage on Peanut by Exogenous Application of Chitooligosaccharide

Xinlong Shi, Ziqi Sun, Xian Xue (), Huimin Xu, Yue Wu, Ya Zhang, Yueqin Yang, Suoyi Han, Ruifang Zhao, Mengyuan Zhang and Xinyou Zhang ()
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Xinlong Shi: College of Agriculture/Tree Peony, Agriculture College of Henan University of Science and Technology, Luoyang 471023, China
Ziqi Sun: The Shennong Laboratory, Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture, Henan Provincial Key Laboratory for Oil Crops Improvement, State Industrial Innovation Center of Biological Breeding, Henan Academy of Crop Molecular Breeding, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
Xian Xue: College of Agriculture/Tree Peony, Agriculture College of Henan University of Science and Technology, Luoyang 471023, China
Huimin Xu: College of Biological Sciences, China Agricultural University, Beijing 100193, China
Yue Wu: The Shennong Laboratory, Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture, Henan Provincial Key Laboratory for Oil Crops Improvement, State Industrial Innovation Center of Biological Breeding, Henan Academy of Crop Molecular Breeding, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
Ya Zhang: Henan Polytechnic Institute, Nanyang 473009, China
Yueqin Yang: College of Agriculture/Tree Peony, Agriculture College of Henan University of Science and Technology, Luoyang 471023, China
Suoyi Han: The Shennong Laboratory, Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture, Henan Provincial Key Laboratory for Oil Crops Improvement, State Industrial Innovation Center of Biological Breeding, Henan Academy of Crop Molecular Breeding, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
Ruifang Zhao: The Shennong Laboratory, Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture, Henan Provincial Key Laboratory for Oil Crops Improvement, State Industrial Innovation Center of Biological Breeding, Henan Academy of Crop Molecular Breeding, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
Mengyuan Zhang: College of Agriculture/Tree Peony, Agriculture College of Henan University of Science and Technology, Luoyang 471023, China
Xinyou Zhang: College of Agriculture/Tree Peony, Agriculture College of Henan University of Science and Technology, Luoyang 471023, China

Agriculture, 2023, vol. 13, issue 1, 1-13

Abstract: Low temperature is the most common abiotic stress factor in peanut cultivation. Chitooligosaccharide (COS) plays an important role in the low-temperature resistance in plants, however, the role of COS in regulating the cold tolerance in peanuts is not clear. This research investigated the effects of exogenous COS on peanut seedlings in response to low temperatures. The results showed that exogenous COS can significantly alleviate the cooling symptoms of seedlings by reducing the content of malondialdehyde (MDA) and reactive oxygen species (ROS) under simulated low-temperature conditions (8 °C). These reductions may be related to the elevation of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and polyphenoloxidase (PPO) activities and the increased contents of osmotic substances such as soluble sugars (SS), soluble protein (SP), proline (Pro), and total phenols (TP) compared with those in untreated seedlings. Meanwhile, the contents of chlorophyll a and b in a peanut leaf also increased, as well as the net photosynthetic rate ( P n), resulted in an increased plant height, a heavier fresh weight, and an increased dry weight. Notably, the treatment of 100 mg·L −1 COS had maximum gain effects compared with those of other treatments. In summary, this study revealed the usage of COS for chilling stress alleviation, and 100 mg L −1 foliar spraying is recommended.

Keywords: peanut; chitooligosaccharide; cold stress; net photosynthetic rate; lipid peroxidation; enzyme activities (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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