40.光学活性体R/S-1-α-methylbenzyl-3-p-tolylureaがイネとコムギの根端組織における遊離アミノ酸量の変動に及ぼす影響(口頭発表)

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Changes in free amino acid levels in the root tip were examined when R/S-1-α-methylbenzyl-3-p-tolylurea (R/S-MBTU) enantioselectively inhibited root elongation of rice and wheat. Total free amino acids and free glutamine, asparagine, alanine and leucine levels were lower in the 20μM R-MBTU treatment than in the control in rice, and total free amino acids and free glutamine, alanine, valine, leucine and isoleucine levels were reduced in the 20μM S-MBTU treatment in wheat. Changes in free glutamine, asparagine, aspartate, alanine, valine, leucine and isoleucine levels were different between the 20μM R-MBTU treatment of rice and the 20μM S-MBTU treatment of wheat. In particular, changes in asparagine and isoleucine levels differed markedly. These results suggest that enzymes involved in the turnover of free asparagine and isoleucine in the root tip participate in the enantioselective inhibition of root elongation by R/S-MBTU.
植物化学調節学会の論文
2007-10-05