Effects of Methyl Jasmonate on Membrane Permeability and Inorganic Ions Content in Rice Leaves under Drought Stress

doi:10.7668/hbnxb.2010.01.027

Abstract

Abstract: Methyl Jasmonate(MeJA)is an important naturally physiological substance that regulates the expression of plant defense genes in response to various environmental stress including drought.Different concentration of MeJA treatment(250,2.5 and 250μmol/L) under drought stress were chosen to study its effect on physiological traits of rice seedlings.Under drought stress condition,leaf water potential and chlorophyll content were significantly decreased,whereas conductivity,the content of MDA and inorganic ions(K⁺,Ca²⁺,Mg²⁺) in rice leaves were significantly increased,these effects could be restrained after spraying various concentration of MeJA(250,2.5,0.25μmol/L),which meant MeJA could increase drought resistance.There existed concentration effect,0.25 μmol/L MeJA had the best effect,2.5 μmol/L took second place,the third was 250μmol/L.

Key words: Methyl Jasmonate, Drought, Rice, Drought resistance

CLC Number:

Q946.81

DONG Tao-xing1,2,CAI Kun-zheng1,ZENG Ren-sen1. Effects of Methyl Jasmonate on Membrane Permeability and Inorganic Ions Content in Rice Leaves under Drought Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(1): 136-140. doi: 10.7668/hbnxb.2010.01.027.

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