Abstract:
The effect of L-and D-isomer of four kinds of amino acids (Alanine, Serine, Methionine and Valine) with different concentration on seedlings of wheat embryos in vitro was studied. The results showed that D-isomers of Alanine and Serine could strongly inhibit seedling growth when their concentration reached to 3 mmol/L, but their L-isomers had much less or no effect. It belongs to a rare phenomenon that the D-amino acids inhibit plant growth. When the seedlings enduring fourday inhibition by D-alanine and D-serine were transferred into the medium containing no amino acid, their growth recovered again. This suggested that there might exist a feedback mechanism for the D-amino acid inhibiting effect, which was of great importance to screen plant growth retardants and plant genetic markers in vitro.
Key words:
D-amino acid,
Alanine,
Serine,
Feedback inhibition,
Wheat embryos in vitro
CLC Number:
ZHAO Da-hua, YANG Jing, LI You-yong. The Inhibition of D-amino Acid on Plant Growth[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(2): 60-63. doi: 10.3321/j.issn:1000-7091.2007.02.016.