Regulation of Reactive Oxygen Species during Salt Stress in Plants and Their Crosstalk with Other Signaling Molecules—Current Perspectives and Future Directions
Author:
Kesawat Mahipal Singh1ORCID, Satheesh Neela2ORCID, Kherawat Bhagwat Singh3, Kumar Ajay4ORCID, Kim Hyun-Uk5ORCID, Chung Sang-Min6, Kumar Manu6ORCID
Affiliation:
1. Department of Genetics and Plant Breeding, Faculty of Agriculture, Sri Sri University, Cuttack 754006, India 2. Department of Food Nutrition and Dietetics, Faculty of Agriculture, Sri Sri University, Cuttack 754006, India 3. Krishi Vigyan Kendra, Bikaner II, Swami Keshwanand Rajasthan Agricultural University, Bikaner 334603, India 4. Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi-221005, India 5. Department of Bioindustry and Bioresource Engineering, Plant Engineering Research Institute, Sejong University, Seoul 05006, Republic of Korea 6. Department of Life Science, College of Life Science and Biotechnology, Dongguk University, Goyang 10326, Republic of Korea
Abstract
Salt stress is a severe type of environmental stress. It adversely affects agricultural production worldwide. The overproduction of reactive oxygen species (ROS) is the most frequent phenomenon during salt stress. ROS are extremely reactive and, in high amounts, noxious, leading to destructive processes and causing cellular damage. However, at lower concentrations, ROS function as secondary messengers, playing a critical role as signaling molecules, ensuring regulation of growth and adjustment to multifactorial stresses. Plants contain several enzymatic and non-enzymatic antioxidants that can detoxify ROS. The production of ROS and their scavenging are important aspects of the plant’s normal response to adverse conditions. Recently, this field has attracted immense attention from plant scientists; however, ROS-induced signaling pathways during salt stress remain largely unknown. In this review, we will discuss the critical role of different antioxidants in salt stress tolerance. We also summarize the recent advances on the detrimental effects of ROS, on the antioxidant machinery scavenging ROS under salt stress, and on the crosstalk between ROS and other various signaling molecules, including nitric oxide, hydrogen sulfide, calcium, and phytohormones. Moreover, the utilization of “-omic” approaches to improve the ROS-regulating antioxidant system during the adaptation process to salt stress is also described.
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
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