Rice Genomics and Genetics 2024, Vol.15, No.1, 36-47 http://cropscipublisher.com/index.php/rgg 36 Research Article Open Access Physiological Mechanisms of Photosynthesis and Antioxidant System in Rice under High Temperature Stress Jun Tao, Jiaqi Han Biotechnology Research Center, Cuixi Academy of Biotechnology, Zhuji, 311800, Zhejiang, China Corresponding author email: jiaqi@hotmail.com Rice Genomics and Genetics, 2024, Vol.15, No.1 doi: 10.5376/rgg.2024.15.0005 Received: 03 Dec., 2023 Accepted: 07 Jan., 2024 Published: 26 Jan., 2024 Copyright © 2024 Tao and Han, 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: Tao J., and Han J.Q., 2024, Physiological mechanisms of photosynthesis and antioxidant system in rice under high temperature stress, Rice Genomics and Genetics, 15(1): 36-47 (doi: 10.5376/rgg.2024.15.0005) Abstract Rice (Oryza sativa), as one of the major global food crops, faces threats to its growth and yield due to climate change, particularly high-temperature stress. This study aims to delve into the physiological mechanisms of rice photosynthesis and antioxidant systems under high-temperature stress conditions. The objective is to analyze how rice responds to high-temperature pressure and understand its adaptive mechanisms. By synthesizing and analyzing data related to rice photosynthesis and antioxidant systems under high-temperature stress, the study summarizes the physiological responses of rice to high temperature, including the adverse impacts on growth and yield, as well as changes in relevant physiological parameters. Furthermore, the study discusses the regulation of photosynthesis and the mechanisms of the antioxidant system under high-temperature conditions, with particular emphasis on the variations in antioxidant enzyme activities and the importance of antioxidant substances in protecting plants from oxidative damage. The significance of this research lies in enhancing our understanding of the adaptability of rice to climate change, providing crucial insights for improving rice resistance to high-temperature stress. Keywords Rice (Oryza sativa); Reproductive organ development; Gene editing technology; Sustainable agriculture; Food safety 1 Introduction Climate change poses a huge challenge to global agriculture and food production, and high temperature stress is one of the increasingly serious problems. As global temperatures rise, crops face more frequent and intense high temperature events, among which rice (Oryza sativa), as one of the most important food crops in the world, has been severely affected (Xu et al., 2021). Rice is the main food source for hundreds of millions of people around the world, so it is critical to understand and address the impact of heat stress on rice yields and global food security. The impact of high temperature on rice is not only reflected in yield, but also includes key physiological processes such as photosynthesis and antioxidant systems. This article aims to deeply explore the physiological mechanisms of photosynthesis and antioxidant systems in rice under high temperature stress conditions, with a view to providing agricultural scientists, researchers, and farmers with important insights on how to improve high temperature stress resistance in rice. This study will focus on the physiological response of rice to high temperature stress. The impact of high temperature on rice growth and development is complex and multi-faceted, including reduced yield, shortened growth period, reduced photosynthetic efficiency, etc. These effects will also be discussed in detail to reveal how high temperature can affect rice growth and development. How to damage rice growth. Photosynthesis is a key process for plant growth and yield. High temperature stress may lead to leaf damage, photosystem obstruction and insufficient supply of photosynthetic substrates. In-depth study of the impact of high temperature on rice photosynthesis, analysis of how high temperature disrupts photosynthesis, and discussion of the role of rice in the adjustment mechanism is particularly important when dealing with high temperature and pressure. In terms of antioxidant system, this research will pay special attention to the oxidative stress reaction caused by high temperature stress. High temperature may cause oxidative damage, accumulate reactive oxidative substances,
RkJQdWJsaXNoZXIy MjQ4ODYzNA==