J Integr Plant Biol. ›› 1986, Vol. 28 ›› Issue (4): -.

• Research Articles •    

Field Studies of the Wheat Stomata Resistance Influenced by Soil Water Content

Lu Zhen-min, Niu Wen-yuan and Zhang Yi   

Abstract: Concurrent observations of soil water potential and leaf stomata diffusion resistance were made on two, plots of wheat grown at Datun Agro-ecological Experimental Station in Beijing under two different soil water conditions. These data were further complemented by weather and physiological observation. In this paper, we mainly analysed the influence of soil water potential on the status of wheat leaf stomatal resistance. The results indicate that: (1) there is a obvious influence of soil water potential on the status of wheat leaf stomata under normal conditions and (2) there is a different upper and lower epidermis stomata of wheat leaf respond to the soil water potential. The lower epidermis stomata are more sensitive to soil water potential than upper epidermis one. (3) There is a linear relationship between the ratio of lower and upper epidermis stomata resistance and soil water potential in root layer, according to this we can diagnose the degree of wheat water deficit.

Key words: Stomatal resistance, Soil water potential, Fractional content of water in the soil, Wheat

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