Related Experiment Video
Updated: Aug 10, 2026

Monitoring Plant Hormones During Stress Responses
Published on: June 15, 2009
Complementary interactions between oxidative stress and auxins control plant growth responses at plant, organ, and
Taras Pasternak1, Geert Potters, Roland Caubergs
1Institute of Cell Biology and Genetic Engineering, National Academy of Science of Ukraine, Zabolotnogo str. 148, U-03650 Kiev, Ukraine.
Abstract:
Plant stress responses are a key factor in steering the development of cells, tissues, and organs. However, the stress-induced signal transduction cascades that control localized growth and cell size/differentiation are not well understood. It is reported here that oxidative stress, exerted by paraquat or alloxan, induced localized cell proliferation in intact seedlings, in isolated root segments, and at the single cell level. Analysis of the stress-induced mitotic activity revealed that oxidative stress enhances auxin-dependent growth cycle reactivation. Based on the similarities between responses at plant, tissue, or single cell level, it is hypothesized that a common mechanism of reactive oxygen species enhanced auxin-responsiveness underlies the stress-induced re-orientation of growth, and that stress-induced effects on the protoplast growth cycle are directly relevant in terms of understanding whole plant behaviour.
Related Concept Videos
Regulation of Transpiration by Stomata
Plant Hormones
Responses to Drought and Flooding
Responses to Heat and Cold Stress
Responses to Salt Stress
Cell Signaling in Plants

