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Agriculture 2014, 4(2), 96-112; doi:10.3390/agriculture4020096
Article

Evaluation of Spring Wheat (20 Varieties) Adaptation to Soil Drought during Seedlings Growth Stage

1
, 1,* , 1
, 1
, 1
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 and 2
1 The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland 2 Department of Plant Physiology, Agricultural University, Podluzna 3, 30-239 Krakow, Poland
* Author to whom correspondence should be addressed.
Received: 22 January 2014 / Revised: 22 March 2014 / Accepted: 26 March 2014 / Published: 4 April 2014
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Abstract

The effect of soil drought (10 days) on the growth of plants, the accumulation of water and leakage of electrolytes, gas exchange, the contents of chl a + b and carotenoids in leaves and photochemical activity of photosystem II was studied at the seedling stage by transient fluorescent analysis in 20 of the popular varieties of polish spring wheat. Drought caused a particularly strong reduction in vigor of growth of seedlings, net photosynthesis rate and triggered an increase in electrolyte leakage from the leaves. Certain varieties during the drought demonstrated relatively intense CO2 assimilation at low water loss through transpiration. The varieties tested were significantly different in terms of tolerance to drought of the processes of gas exchange and seedlings development. Photochemical processes in PSII showed high tolerance to drought and at the same time low differentiation among varieties. The results obtained suggested that tolerance of growth parameters to drought and CO2 assimilation at the seedling stage may alleviate consequent depression of final yield of the grain.
Keywords: varieties; drought stress; stress index; wheat; photochemical activity; yield; assimilation CO2; gas exchange; water management varieties; drought stress; stress index; wheat; photochemical activity; yield; assimilation CO2; gas exchange; water management
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Biesaga-Kościelniak, J.; Ostrowska, A.; Filek, M.; Dziurka, M.; Waligórski, P.; Mirek, M.; Kościelniak, J. Evaluation of Spring Wheat (20 Varieties) Adaptation to Soil Drought during Seedlings Growth Stage. Agriculture 2014, 4, 96-112.

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