PJB-2021-106
Memory response of pepper antioxidant system to cycles of drought and re-watering stress
Jinfen Wen, Kai Zhao, Junheng Lv, Jinlong Huo, Hongjian Wan, Shui Zhang, Xiang Zhang, Zhihe Xie and Minghua Deng
Abstract
Stress causes a stress memory in some plants, which appears to play a vital role in responding to repeated stress conditions. However, it's uncertain whether pepper has drought stress memory and, if so, what the physiological process is. We investigated the creation of pepper drought memory following the half-wilting and re-watering treatment cycles and the induction of the reaction oxygen species (ROS) scavenging system by evaluating antioxidant content, activity, and gene expression of antioxidant enzymes. The results indicated this treatment can significantly increase the ASA and GSH content in pepper seedlings under 5 cycles of drought and re-watering stress, and significantly increase the POD, SOD, CAT, APX, GPX, and GR activities and gene expression; This physiological and biochemical change improves the ability of pepper seedlings to remove ROS, so its ROS content is lower than that of untreated pepper seedlings under drought stress. In the end, the MDA content was remarkably lower than the untreated, indicating that the damage to the plants was less than that of the untreated. These results indicate that the antioxidant defence system is associated with memory response to circular drought and re-watering stress in pepper
To Cite this article:
Wen, J., K. Zhao, J. Lv, J. Huo, H. Wan, S. Zhang, X. Zhang, Z. Xie and M. Deng. 2022. Memory response of pepper antioxidant system to cycles of drought and re-watering stress. Pak. J. Bot., 54(5): DOI: http://dx.doi.org/10.30848/PJB2022-5(21)
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