Changes in transpiration rate of SO_2-resistant and-sensitive plants with SO_2 fumigation and the participation of abscisic acid
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概要
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Peanut and tomato plants were resistant to 2.0 ppm SO_2, while radish, perilla and spinach plants were sensitive. The amounts of SO_2 absorbed by peanut and tomato were obviously less than those absorbed by radish, perilla and spinach. Transpiration rates of peanut and tomato began to decrease within 5 min after the commencement of SO_2 fumigation and reached minimum levels, i.e., 10 and 50% of the initial levels, respectively, after 20 min exposure. The rate of perilla did not change for 70 min after initiation of fumigation, then declined. Those of radish and spinach did not change for about 20 and 30 min, then decreased gradually. The content of abscisic acid (ABA) was highest in peanut. The content in tomato was also high, but low in radish, perilla and spinach. Radish supplied with exogenous ABA began to decrease its transpiration rate immediately after SO_2 fumigation and was markedly resistant to SO_2. ABA in leaves may control the rapid stomatal closure following SO_2 fumigation.
- 日本植物生理学会の論文
著者
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Kondo Noriaki
Department Of Biological Sciences Graduate School Of Science The University Of Tokyo
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Sugahara Kiyoshi
Department Of Biology Faculty Of Science Kyushu University
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Sugahara Kiyoshi
Department Of Environmental Biology National Institute For Environmental Studies
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Kondo Noriaki
Department Of Environmental Biology National Institute For Environmental Studies
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