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KMID : 0368419990420040294
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Journal of Plant Biology
1999 Volume.42 No. 4 p.294 ~ p.298
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The Response to Oxidative Stress Induced by Magnesium Deficiency in Kidney Bean Plants
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Kiyoshi, Tanaka
Shon, Young-Goel/Lee, Sung-Ho/Kim, Hak-Yoon/Moon, Myoung-Soo/Lee, Jeung-Joo
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Abstract
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To understand the plant response to oxidative stresses, we studied the influence of magnesium (Mg^++) deficiency on the formation of hydrogen peroxide (H_2O_2), malondialdehyde (MDA), and protease activity in kidney bean plants. The expression pattern of proteins under Mg^++ deficiency also was examined via two-dimensional electrophoresis. The formation of H_2O_2 and MDA increased in the primary leaves of plants grown in a nutrient solution deficient in Mg^++. Protease activity in Mg^++ -deficient plants was also higher than in those grown with sufficient Mg^++. The expression pattern of the proteins showed that 25 new proteins were generated and 64 proteins disappeared under Mg^++- deficient conditions. Therefore, a deficiency in Mg^++ may cause oxidative stress and a change in protein expression. Some of these proteins may be related to the oxidative stress induced by Mg^++ deficiency.
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