THE EFFECT OF WATER AND TEMPERATURE STRESS ON THE WINTER WHEAT WATER POTENTIAL
Abstract
Due to the global climate changes, increase of its continentality and sharp fluctuations of meteorological factors it is necessary to improve heat resistance of developed varieties. Drought tolerant plants can adapt to dry conditions during ontogenesis and grow, develop and give yields under such conditions. The proper selection of the varieties, being highly resistant to drought in any soil-climatic areas will help to obtain stable yields in the region. The researchers suggest a complex of informative indexes, which allow assessing a degree of drought resistance of the varieties. It concerns a state of leaves, especially in the periods of filling and ripening of grains, capacity of leaves to water retention (6), longer size of coleoptile, ratio of above-ground mass to the amount of consumed water and many other indexes. In our work we studied the indexes of water regime of plants, such as general water content, water deficit, water retention and water absorbing capacities, which determine the condition of plants during the vegetation and allow estimate their response to the stress factors in the various periods of ontogenesis. The assessment of the characteristics of water regime was carried out on the provocative background ‘zasushnik’ with the artificial drought (30% TMC and less), with the optimal moisture supply (70% TMC, irrigation) and with the natural moisture (50% TMC, field). According to all characteristics of leaf water regime we identified the samples of winter soft wheat ‘Admiral’, ‘Izyuminka’, ‘Lidiya’, ‘Kapitan’ and ‘Lilit’, which belong to the steppe ecotype and possess high resistance and adaptability to the complex drought.
About the Authors
E. I. Nekrasov
FSBSI All-Russian Research Institute of Grain Crops after I.G. Kalinenko
Russian Federation
Russian Federation
Junior research associate
347740, Zernograd, Nauchny Gorodok, 3
E. V. Ionova
FSBSI All-Russian Research Institute of Grain Crops after I.G. Kalinenko
Russian Federation
Russian Federation
Doctor of Agricultural Sciences
347740, Zernograd, Nauchny Gorodok, 3
References
1. Clarke, J. M. Excised-leaf water retention capability as an indicator of drought resistance of Triticum genotypes / J. M. Clarke, T. N. McCaig // Canadian Journal Plant Science. – 1982. – № 62. – Р. 571-578.
2. Ionova E.V. The stability of the varieties and lines of wheat, barley and sorghum to a regional type of drought: thesis on Doctor of Agr.Sc. / E.V. Ionova. – Krasnodar, 2011. – 49 p.
3. Ionova, E.V. Physiological methods of the assessment of drought tolerance of the varieties and lines of winter wheat / E.V. Ionova, E.I. Nekrasov // Grain Economy of Russia. – 2013. – № 5. – PP. 12-21.
4. Ionova, E.V. The change of water regime of winter soft wheat in the conditions of provoking background (“Zasushnik”) / E.V. Ionova, E.I. Nekrasov // Legumes and groats. – 2014. – № 4 (12). – PP. 42-45.
5. Diagnostics of the plant resistance to stress factors. L.: ARIR, 1988. – PP.10-25.
Review
For citations:
Nekrasov E.I., Ionova E.V. THE EFFECT OF WATER AND TEMPERATURE STRESS ON THE WINTER WHEAT WATER POTENTIAL. Grain Economy of Russia. 2016;(5):59-62. (In Russ.)
Views:
415
Email this article 