About this Research Topic
As sessile organisms, plants are continuously exposed to a wide range of harsh environmental conditions, including cold, drought, salt, heat, which have major impact on plant development and productivity thus causing serious agricultural yield losses. To survive, plants have evolved complex physiological and biochemical adaptations to cope with a variety of adverse environmental stresses. The complex regulatory processes of plant adaptation to abiotic stress involve stress sensing and signaling transduction. Among them, reactive oxygen species (ROS) are key regulators and play pivotal roles during plant stress responses.
ROS such as hydrogen peroxide (H2O2), superoxide anions (O2−.), hydroxyl radical (OH−) and singlet oxygen (1O2) are thought to function as early signals during plant abiotic stress responses. However, overproduction of ROS causes oxidative damages through protein oxidation, DNA damage and lipid peroxidation. ROS were long regarded as unwanted and toxic by-products of physiological metabolism. However, ROS are now recognized as central players in the complex signaling network of cells. Therefore, a fine-tuning control between ROS production and scavenging pathways is essential to maintain non-toxic levels in planta under stressful conditions through enzymatic and non-enzymatic antioxidant defense systems. Accumulating evidences have shown that the ROS signaling pathway interplays with phytohormonal networks, including abscisic acid (ABA), ethylene (Et), jasmonic acid (JA) and brassinosteroids (BR), thereby allowing plants to regulate stress resistance responses. However, the detailed regulatory mechanisms between ROS and hormones remain to be elucidated. Future works related to ROS mediated phytohormone signaling transduction and/or phytohormone modulated ROS homeostasis will shed light on the interaction between ROS and phytohormone.
This Research Topic will focus on plant ROS homeostasis under stress conditions and interplays between ROS and hormone networks. We aim to ask how ROS functions as common regulator during plant stress responses and how ROS network connects with different phytohormone pathways. All types of articles including original research, review, mini review, method, and perspective/opinion/hypothesis are welcomed.
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