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J Biosci Bioeng. 2003;95(4):419-20.

Effects of D-methionine or L-methionine on root hair of Brassica rapa.

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Department of Bioscience & Technology, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu-shi, Shiga 525-8577, Japan.


We examined the effects of D- or L-amino acids on the stimulation of Brassica rapa roots. When 6.7 microM of D-methionine (D-Met) or L-methionine (L-Met) was applied, root hair numbers increased. L-Met (above concentration of 67.0 microM) caused the tip of roots to spiral. When CoCl2 (ethylene synthesis inhibitor) was added into the medium, L-Met lost its activity but COCl2 did not inhibit the bioactivity of D-Met.


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