Salicylic Acid and Abiotic Stress Responses in Rice

文献类型： 外文期刊

第一作者： Pal, M.

作者： Pal, M.;Kovacs, V.;Szalai, G.;Soos, V.;Janda, T.;Ma, X.;Liu, H.;Mei, H.

作者机构：

关键词： abiotic stress;cold;drought;polyamines;rice;salicylic acid

期刊名称：JOURNAL OF AGRONOMY AND CROP SCIENCE （ 影响因子：3.473； 五年影响因子：4.395 ）

ISSN： 0931-2250

年卷期： 2014 年 200 卷 1 期

页码：

收录情况： SCI

摘要： Among plant species rice (Oryza sativa L.) leaves can be characterised with a very high level of salicylic acid content; however, its exact role is still poorly understood. In the present work, rice genotypes with different levels of drought tolerance have been subjected to PEG-induced drought or cold stress at 10 degrees C in order to find relationship between the salicylic acid metabolism and the level of stress tolerance; and between the salicylic acid level and other protective mechanisms. Although the drought-sensitive genotypes usually contained slightly higher amount of salicylic acid than the tolerant ones, there was no strong correlation between the salicylic acid contents and the degree of drought tolerance. Because the expression pattern of the chorismate synthase and isochorismate synthase genes did not correlate with the level of salicylic acid, but there was a correlation between the levels of salicylic acid and ortho-hydroxy-cinnamic, it is assumed that the salicylic acid synthesis via ortho-hydroxy-cinnamic acid may play a more decisive role than the chorismate-isochorismate-salicylic acid pathway in rice. While the activity of the glutathione reductase enzyme did not show correlation with drought tolerance, the glutathione S-transferase activities were usually higher in the leaves of the drought-tolerant varieties than in the sensitive ones. The salicylic acid contents in the leaves were not substantially affected by the applied stress conditions; however, other stress-related compounds polyamines showed marked, stress-specific responses. Correlation data suggest that there is no direct link between the abiotic stress-induced polyamine changes and the salicylic acid metabolism in rice.

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