Osmotic adjustment substance responses of four Elytrigia repens re-watered after drought stress

Abstract

Abstract: The physiological responses to water shortage of four E. repens re-watered after drought stress was studied in a pot experiment. Soil water content showed a decreasing trend with a significant (P<0.05) difference in the soil water content after 0, 5, 10, and 15 days of re-watering following drought stress. After re-watering, the leaf water saturation deficit of E. repens increased, while the contents of soluble protein, proline, and free amino acid initially decreased but then increased. The soluble carbohydrate content decreased. There was a negative correlation between free amino acids, proline and soluble carbohydrate, and it was significant (P<0.01) between soluble carbohydrate and free amino acid. By comprehensive analysis, the sequence of drought resistance of E. repens materials was E22>E5>E16>E1. When the soil water content reached 39.47%, E. repens began to suffer drought stress and irrigation was needed.

CLC Number:

SUN Zong-jiu, LI Pei-ying, Abulaiti, CHEN Le-ning. Osmotic adjustment substance responses of four Elytrigia repens re-watered after drought stress[J]. Acta Prataculturae Sinica, 2009, 18(5): 52-57.

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