Amelioration of the Salt-stressed Root Growth of Rice and Normalization of the Na^+ Distribution between the Shoot and Root by (S)-α-Methylbenzyl-2-fluoro-4-methylphenylurea(Organic Chemistry)
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概要
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Optically active α-methylbenzyl phenyl ureas (MBPUs) show diverse plant physiological properties. Experiments were conducted to evaluate the salt-stress response of just-germinated rice seedlings supplemented with the S-enantiomer of MBPUs by assessing the growth and Na^+ content. This study indicates that S-MBPUs served as a unique stress reliever for just-germinated young seedlings of rice injured by salinity. NaCl severely affected the root growth of rice seedlings. Concomitant treatment with S-MBPUs effectively ameliorated the growth inhibition of rice by NaCl. Glycine betaine (GB) did not act as a reliever of the NaCl stress. The addition of S-α-methylbenzyl 2-fluoro-4-methylphenyl urea (7, denoted as S-FM) to the saline medium ameliorated not only the root growth but also the protein content and dry weight of roots depending upon its concentration. The protein content, Na^+ content and growth rate were correlated to each other with a positive relationship. The Na^+ distribution ratio (S/R_<(Na^+)>) between the shoot and root increased with increasing concentration of NaCl when added alone, viz. with increasing growth reduction. A concomitant treatment with S-FM (7), however, resulted in the S/R_<(Na^+)> value becoming smaller with growth amelioration. This indicates that S-FM (7) controlled the translation of Na^+ from the roots to shoots. S-FM (7) would have influenced some inherent functions connected with the Na^+ behavior in the rice plant, although details of the mechanism for normalization of the S/R_<(Na^+)> ratio are still not clear.
- 社団法人日本農芸化学会の論文
- 2002-02-23
著者
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Omokawa Hiroyoshi
Center For Research On Wild Plants Utsunomiya University
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AONUMA Shin-ichi
Center for Research on Wild Plants, Utsunomiya University
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Aonuma Shin-ichi
Center For Research On Wild Plants Utsunomiya University
関連論文
- Enantioselective Effects of Optically Active α-Methylbenzyl-S-triazine on the Root Growth of Rice and Echinochloa Plants and Their Herbicidal Activity(Organic Chemistry)
- Amelioration of the Salt-stressed Root Growth of Rice and Normalization of the Na^+ Distribution between the Shoot and Root by (S)-α-Methylbenzyl-2-fluoro-4-methylphenylurea(Organic Chemistry)
- Triticeae plants preferentially responded to S-1-α-methylbenzyl-3-p-tolylurea in root growth and tetrazolium reduction assays