Turgor Pressure Maintenance and Osmotic Adjustment of Wheat Leaves under Soil Water Stress

doi:10.3321/j.issn:1000-7091.1991.04.018

Abstract

Abstract: The experimental results for two years showed that the leaves of four wheat cultivars produced osmotic adjustment under long soil water stress and slowly soil dewatering conditions. The osmotic adjustment ability of ear pregnant stage and grain filling stage was stronger than that of others. The degree of osmotic adjustment was 0.40-0.64MPa in wheat leaves. The ability of osmotic adjustment of cultivars with strong drought resistance was stronger than that of cultivars with weak drought resistance. The turgor pressure of wheat leaves was almost not changed by osmotic adjustment under mild stress or 60% of soil water content. For four treatments of five development stages, the results of regression analysis of turgor pressure and leaf water potential showed that turgor pressure decreased units when leaf water potential changed one unit: Changle NO. 5 (0.146)

Key words: Wheat, Soil water stress, Osmotic adjustment, Turgor pressure maintenance

LiDequan, ZouQi, ChengBingsong. Turgor Pressure Maintenance and Osmotic Adjustment of Wheat Leaves under Soil Water Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(4): 100-105. doi: 10.3321/j.issn:1000-7091.1991.04.018.

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