Effects of Drought Stress on the Content of Osmotic Adjusting Substance and Photosynthesis in Jinguang Plum Leaves

doi:10.7668/hbnxb.2008.01.026

Abstract

Abstract: Using potted Jinguang plum seedling as material,the content of osmotic adjusting substance and the diur2nal variation of photosynthesis in Jinguang plum leaves were studied. The results were as follows:with the increase ofdrought stress degree,the relative water content and chlorophyll content in leaves were decreased,but the permeability ofplasma membrane and the content of MDA,soluble sugar and proline in leaves were increased;And with the developmentof drought stress,the photosynthesis rate,transpiration rate and stomatal conductance were declined,and intercellular CO2concentration was raised;The main reason for the decrease of photosynthesis rate were stomatal limitation in light droughtstress,and nonstomatal limitation in severe drought stress.

Key words: Jinguang plum, Drought stress, Osmotic adjusting substance, Photosynthesis

CLC Number:

S662.4

LIU Zun-chun, CHEN Rong-jiang, BAO Dong-e. Effects of Drought Stress on the Content of Osmotic Adjusting Substance and Photosynthesis in Jinguang Plum Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(1): 119-122. doi: 10.7668/hbnxb.2008.01.026.

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