Journal of Energy Bioscience 2025, Vol.16, No.2, 64-74 http://bioscipublisher.com/index.php/jeb 64 Research Insight Open Access Role of Reactive Oxygen Species in Potato's Stress Response Zhang Qian, Wenzhong Huang Biomass Research Center, Hainan Institute of Tropical Agricultural Resouces, Sanya, 572025, Hainan, China Corresponding email: wenzhong.huang@hitar.org Journal of Energy Bioscience, 2025, Vol.16, No.2 doi: 10.5376/jeb.2025.16.0007 Received: 29 Jan., 2025 Accepted: 28 Feb., 2025 Published: 14 Mar., 2025 Copyright © 2025 Qian and Huang, This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: Qian Z., and Huang W.Z., 2025, Role of reactive oxygen species in potato's stress response, Journal of Energy Bioscience, 16(2): 64-74 (doi: 10.5376/jeb.2025.16.0007) Abstract This study focuses on the role of reactive oxygen species (ROS) when potatoes encounter stress. ROS is a signaling molecule present in plants. When plants face external stress (such as environmental changes or pests and diseases), ROS plays an important role. However, it also has certain counter-effects. If the content of ROS in plants is too high, it will cause oxidative stress and damage cells. In order to control the amount of ROS, potatoes will activate some antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (PRXs), which can remove excess ROS and protect cells from damage, while also making plants more resistant to stress. ROS will participate in regulating responses under stress such as drought, high salt, high or low temperature environments, as well as pathogens and leaf-eating insects. It not only helps to transmit stress signals, but also cooperates with some plant hormones (such as ABA, SA and JA) to regulate the plant's defense mechanism. Through this study, we also found that there are interactions between ROS signals and other signaling pathways (such as calcium signals). The study also discusses how to use this knowledge to improve potato's stress resistance. Keywords Reactive oxygen species (ROS); Potatoes (Solanum tuberosum L.); Stress tolerance; Oxidative damage; Antioxidant enzymes 1 Introduction Potato (Solanum tuberosumL.) is one of the most important food crops in the world. It is a staple food in many countries and contributes greatly to global food security. It is not only rich in nutrients, but also adaptable to a variety of climates and soil conditions, so it plays an important role in global agriculture (Ma et al., 2021a). Potatoes are also of high economic value. People not only eat it directly, but it is also an important raw material for the food processing industry (Koubaa et al., 2021). Potatoes often encounter a lot of stress during the planting process, which will affect its yield. Abiotic factors such as drought, salinity, and hypoxia will cause a lot of reactive oxygen species (ROS) in plants, causing oxidative stress (Fan, 2014; Sahoo et al., 2020; Zhang et al., 2021). In addition, pathogens such as Phytophthora infestans and Erwinia carotovora can also cause potatoes to produce ROS, which can damage cells and make the plants unhealthy (Hua et al., 2020; Luo et al., 2021). To ensure stable potato yields, we need to breed varieties with strong stress resistance (Ma et al., 2021a). This study focuses on the specific role of reactive oxygen species (ROS) in potato response to stress. ROS is an important signaling molecule in many plant activities, including the response to stress. However, if there are too many ROS, it will also damage plant cells, so plants need to remove excess ROS. What we want to find out is how potatoes regulate and remove excess ROS when faced with stress, and try to find ways to improve potatoes' ability to resist stress. We will also study the regulation of ROS in cells and how it helps potatoes resist external stress. 2 Overview of reactive oxygen species (ROS) in potatoes Reactive oxygen species (ROS) are a class of molecules that are particularly reactive and play an important role in the life activities of potatoes, especially when faced with external stress. Common ROS include superoxide anions (O2 -), hydrogen peroxide (H2O2), and hydroxyl radicals (•OH). These molecules are usually generated as a byproduct of plant metabolism. In potatoes, ROS participate in signal transmission and also help plants cope with
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