The Role of Hormones in Fast Growth Responses of Wheat Plants to Osmotic and Cold Shocks |
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| Authors: | Veselov D S Sabirzhanova I Akhiyarova G Veselova S V Farkhutdinov R G Mustafina A R Mitrichenko A N Dedov A V Veselov S Yu Kudoyarova G R |
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| Institution: | (1) Laboratory of Plant Physiology, Institute of Plant Biology, Ufa Research Center, Russian Academy of Sciences, pr. Oktyabrya 69, Ufa, Bashkortostan, 450054, Russia;(2) Department of Plant Physiology, Bashkir State University, Ufa |
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| Abstract: | The effects of nutrient-solution cooling and PEG addition to the nutrient solution on the phytohormone content, the rate of leaf growth, leaf extensibility under the influence of external mechanical action, osmotic potential, and transpiration were studied in seven-day-old wheat plants. Leaf growth rapidly ceased, and the transpiration rate was reduced in both treatments. Growth cessation induced by PEG was transient, and growth resumption was preceded by an increase in the leaf extensibility. The functional role of auxin accumulation in plant shoots in the control of extensibility as well as the relationship between the ABA accumulation and a decrease in the cytokinin content, on the one hand, and reduced transpiration, on the other hand, under stress conditions are discussed. |
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| Keywords: | Triticum durum growth rate leaf extensibility osmotic potential transpiration osmotic shock low temperature phytohormones |
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