Recovery from drought stress in tobacco
- 1 January 2012
- journal article
- Published by Taylor & Francis Ltd in Plant Signaling & Behavior
- Vol. 7 (1), 19-21
- https://doi.org/10.4161/psb.7.1.18375
Abstract
Plant response to water deficit and subsequent re-watering is fine tuned at the whole plant level. It differs not only between shoot and root, but also among particular leaves along a plant axis. We estimated the expression of proline metabolism-related genes and the activity of senescence-related promoter in roots and individual leaves of tobacco plants in the course of drought stress and recovery. Proline plays the dual role of an osmoprotectant and an antioxidant under water deficit. High proline concentration in the youngest uppermost leaves contributed to their protection from drought, which was associated with low degree of senescence. During recovery, elevated proline concentrations persisted and the senescence-related promoter was switched off in all surviving leaves. Two mutually exclusive scenarios were followed by tobacco leaves on recovery—restoration of photosynthesis and metabolism, or death, depending on the progress of senescence.Keywords
This publication has 24 references indexed in Scilit:
- Analysis of Cytokinin Mutants and Regulation of Cytokinin Metabolic Genes Reveals Important Regulatory Roles of Cytokinins in Drought, Salt and Abscisic Acid Responses, and Abscisic Acid BiosynthesisPlant Cell, 2011
- Deficiency in plastidic glutamine synthetase alters proline metabolism and transcriptomic response in Lotus japonicus under drought stressNew Phytologist, 2010
- Analysis of Gene Expression and Physiological Responses in Three Mexican Maize Landraces under Drought Stress and Recovery IrrigationPLOS ONE, 2009
- Cytokinin-Dependent Photorespiration and the Protection of Photosynthesis during Water DeficitPlant Physiology, 2009
- Proline accumulation in plants: a reviewAmino Acids, 2008
- The impact of trans-zeatin O-glucosyltransferase gene over-expression in tobacco on pigment content and gas exchangeBiologia plantarum, 2008
- The role of cytokinins in responses to water deficit in tobacco plants over‐expressing trans‐zeatin O‐glucosyltransferase gene under 35S or SAG12 promotersPlant, Cell & Environment, 2007
- Protein sensors and transducers of cold and osmotic stress in cyanobacteria and plantsMolecular Biology, 2007
- SUGAR SENSING AND SIGNALING IN PLANTS: Conserved and Novel MechanismsAnnual Review of Plant Biology, 2006
- Monitoring expression profiles of Arabidopsis gene expression during rehydration process after dehydration using ca. 7000 full‐length cDNA microarrayThe Plant Journal, 2003