Growth inhibition of lettuce (Lactuca sativa L.) roots by alpha-amino acids, 2-amino-3-cyclopropyl-butanoic acid and 2-amino-5-chloro-4-pentenoic acid, isolated from Amanita castanopsidis Hongo
2001
Wakabayashi, K. | Soga, K. | Hoson, T. | Kamisaka, S. | Yoshimura, H. | Shibata, K.
The effect of two alpha-amino acids, 2-amino-3-cyclopropyl-butanoic acid (ACPBA) and 2-amino-5-chloro-4-pentenoic acid (ACPA) on the growth of lettuce (Lactuca sativa L.) roots was investigated. Both ACPBA and ACPA at 10(-4) M significantly inhibited growth of roots of light-grown seedlings, while they had no effect on hypocotyl growth. The lengths of cortical cells in the mature region of roots that had been exposed to either compound were significantly shorter than those of control roots. Treatment with ACPBA and ACPA significantly decreased the mechanical extensibility of root cell walls prior to the start of inhibition of root growth. On the other hand, these compounds did not decrease the osmotic concentration of the cell sap in root tissues. These results suggest that ACPBA and ACPA inhibit the cell elongation process of lettuce roots by decreasing the mechanical extensibility of cell walls.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library
