Abstract
Effect of a new antitranspirant on the physiology and water use efficiency of soybean under different irrigation rates in an arid region
Highlights
Reducing crop luxury transpiration is important in improving water productivity[1]
A balance between leaf photosynthesis and transpiration can be achieved by adjusting the stomatal behavior to the optimal status using exogenous substances, which lead to an increase in water use efficiency (WUE) at the leaf level
Under W2, FZ did not significantly affect leaf superoxide dismutase (SOD) and POD activities. This was probably because the soil water content was reduced to 40% of field capacity under W2, which led to severe water stress, and at this time soil water content became the main factor affecting leaf SOD and POD activities
Summary
Reducing crop luxury transpiration is important in improving water productivity[1]. A balance between leaf photosynthesis and transpiration can be achieved by adjusting the stomatal behavior to the optimal status using exogenous substances (antitranspirants), which lead to an increase in water use efficiency (WUE) at the leaf level. Antitranspirants can increase leaf superoxide dismutase (SOD) and peroxidase (POD) activities to improve drought resistance in crops[3,4,5,6,7,8], and alleviate the negative effects of drought on crop production[9,10,11,12,13,14]. Under a low irrigation rate, spraying kaolin on the grape significantly reduced leaf gs and Tr, and improved leaf WUE, while there are no significant effect under a high irrigation rate[14].
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