This experiment was carried out to study the effects of seed soaking with exogenous methyl jasmonate (MeJA) on resistance to bacterial leaf blight and antioxidant enzyme activities of rice seedlings with Wen 229 (susceptible to rice bacterial leaf blight ) and Jiazao 312 (resistant) as experimental materials. The results showed that MeJA soaking significantly decreased the disease indexes of bacterial leaf blight in rice seedlings, especially for the resistant cultivar. With rising MeJA solution concentration, the activities of superoxide dismutase, peroridase, catalase and ascorbate peroxidase in leaves of rice seedlings increased firstly and then decreased, while the malondialdehyde (MDA) content raised at first and dropped afterwards. At a concentration of 0.5 mmol/L, MeJA soaking caused damage to rice seedings. The responses of antioxidant enzyme activities and lipid peroxidation content to MeJA soaking varied with variety. The above results indicated that MeJA soaking could effectively relieve the bacterial leaf blight of rice seedlings. The increase of the antioxidant enzyme activities and the decrease of the MDA content are related to its resistant reactions to bacterial leaf blight.
XIANG Miaolian1 , FU Yongqi1 , HE Yongming1, HUANG Youming1, 2 , ZENG Xiaochun1, 2,*
. Effects of Seed Soaking with Methyl Jasmonate on Resistance to Bacterial Leaf Blight and Antioxidant Enzyme Activities of Rice Seedlings[J]. Chinese Journal OF Rice Science, 2014
, 28(4)
: 419
-426
.
DOI: 10.3969/j.issn.1001-7216.2014.04.011
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