Dear Colleagues,

Plants have been challenged by oxidative stress since their first appearance on land, and they are equipped with effective antioxidant defense systems to dynamically regulate the status of oxidative stress during their life cycle. On the other hand, plants have also developed the capability to use reactive oxygen species (ROS, the most important source of oxidative stress) as signals in order to activate further defense pathways against unpredictable oxidative stress events, which can be generated by a wide array of environmental stressors. In the ever-evolving world of plant biology, therefore, the intricate dance between oxidative stress and antioxidant defense mechanisms has always been a subject of paramount significance. As plants navigate a fluctuant environment fraught with abiotic and biotic stressors, their ability to modulate and harness the effects of oxidative stress becomes a cornerstone of their resilience and adaptability.

This Special Issue of Antioxidants, entitled "Oxidative Stress and Antioxidant Defense in Plants", aims to unravel the multifaceted aspects of oxidative stress encountered by plants and the ingenious strategies they employ to combat it. We invite researchers to submit original research articles and reviews that explore the role of oxidative stress and antioxidant defense in plant physiology, biochemistry, molecular biology, and biotechnology. We are particularly interested in studies that address the following topics:

• The regulation of ROS production and scavenging in different plant organs and tissues;
• The signaling pathways and transcription factors involved in oxidative stress responses and antioxidant gene expression;
• The cross-talk between oxidative stress and other abiotic and biotic stresses;
• The cross-talk between ROS and the other signaling molecules like calcium and nitric oxide etc. in plant adaptation to abiotic and biotic stresses;
• The modulation of oxidative stress and antioxidant defense by phytohormones, metabolites, and epigenetic factors;
• New methodology of detecting ROS or visualizing oxidative stress in live plant organs, tissues and cells;
• The manipulation of oxidative stress and antioxidant defense for improving plant productivity, quality, and stress tolerance.

Prof. Dr. Fanrong Zeng
Prof. Dr. Zhong-Hua Chen
Guest Editors

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