Redox and ROS Signaling During Plant Responses to Abiotic Stress

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• Professor Ron Mittler, University of Missouri
• Thursday 14 October 2021, 13:00-14:00
• Online.

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Plants grow and reproduce within a highly dynamic environment that can see abrupt changes in conditions, such as light intensity, temperature, humidity, and/or the presence of different pathogens and insects. Recent studies revealed that plants can respond within minutes to some of these conditions, engaging many different metabolic and molecular networks, as well as rapidly altering their stomatal aperture.

Some of these rapid responses were further shown to propagate throughout the entire plant via waves of reactive oxygen species (ROS), redox, membrane potential, Ca2+, and hydraulic pressure, mediated through the plant vascular system. New findings reveal that several different plasmodesmata-associated proteins, calcium channels, and respiratory burst oxidase homologs (RBOHs) play key roles in regulating and integrating these signals. In addition, new findings identified a key role for ROS and different plant hormones in mediating the acclimation of plants to conditions of stress combination.

The role of ROS in sensing, transducing, and activating plant responses to environmental stresses will be discussed along with different models and hypotheses as to how ROS are involved in the rapid systemic signaling process of plants and how they integrate different signal transduction processes during stress combination.

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This talk is part of the Plant Sciences Departmental Seminars series.

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