Plants encounter various abiotic stresses, such as drought, salinity, and extreme temperatures, which can significantly hinder their growth and productivity. With climate change intensifying these challenges, understanding how plants respond simultaneously to multiple stresses is crucial for developing resilient crops. This Research Topic focuses on the roles of chloroplasts and redox biology in plant responses to combined abiotic stress conditions.

Chloroplasts, essential for photosynthesis, act as environmental sensors that initiate cellular signalling and stress responses. Recent advancements have highlighted their involvement in regulating reactive oxygen species (ROS) and redox status, which are key factors in stress acclimation. This topic invites contributions exploring chloroplast adaptation, redox regulation mechanisms, genetic insights, and systems biology approaches. By fostering interdisciplinary collaboration, we aim to enhance our understanding of how these processes interact, ultimately transforming research findings into practical solutions for improving crop resilience in a changing climate.

The primary goal of this Research Topic is to address the urgent need for a deeper understanding of how chloroplasts and redox biology influence plant resilience to combined abiotic stresses, which include, but are not limited to, drought, salinity, and extreme temperatures. These stresses pose significant threats to agricultural productivity and food security, particularly in the context of climate change. Recent advances in molecular biology, genomics, and metabolomics have provided new insights into the complex signaling networks and adaptive mechanisms involved in chloroplast function and redox regulation.

To tackle this problem, we aim to gather interdisciplinary research that explores the interactions between chloroplasts and redox signaling in the face of multiple stresses. By integrating findings from various studies, we hope to identify key molecular players and pathways that enhance stress tolerance. Furthermore, we seek to discuss potential biotechnological applications that leverage these insights to develop resilient crop varieties. Ultimately, our goal is to provide a comprehensive framework for understanding and improving plant responses to combined abiotic stresses, thereby contributing to sustainable agricultural practices in a changing environment.

This Research Topic invites contributions that explore the intricate relationship between chloroplasts, redox biology, and plant responses to combined abiotic stresses. We welcome original research articles, reviews, and perspectives addressing specific themes, including:

• Chloroplast Function: Adaptations in metabolic pathways and photosynthetic efficiency under stress.
• Redox Regulation: Mechanisms of redox-sensitive signaling and the role of antioxidants in stress tolerance.
• Genetic and Molecular Insights: Identification of key genes, regulatory networks, mRNA, and post-transcriptional modifications linked to chloroplast and redox responses.
• Systems Biology Approaches: Integrative studies combining omics data to elucidate interactions between chloroplasts and abiotic stress pathways.
• Applications in Crop Improvement: Biotechnological strategies for enhancing chloroplast function and redox regulation in agricultural species.

Contributors are encouraged to present innovative findings that advance our understanding of these critical processes in the context of climate resilience.

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Insights into Chloroplasts and Redox-Biology in Plants Facing Combined Abiotic Stresses