Glutathione reduces the inhibition of rice seedling root growth caused by cadmium
Resource
Plant Growth Regulation 16 (3): 249-252
Journal
Plant Growth Regulation
Pages
249-252
Date Issued
1995
Date
1995
Author(s)
Chen, Sheng Lee
Kao, Ching Huei
Abstract
We investigated the effects of agents known to affect cellular glutathione (reduced form, GSH) levels on the growth of rice seedlings treated with Cd. CdCl2 was more effective than CdSO4 in inhibiting root growth. However, CdCl2 had no effect on shoot growth. GSH, a substrate for phytochelatin synthesis, was effective in counteracting growth inhibition of roots by CdCl2. Root growth in the CdCl2 medium was found also to be enhanced by the addition of L-glutamic acid and L-cysteine, both of which are substrates for GSH formation. Buthionine sulfoximine, an inhibitor of GSH synthesis, rendered the roots susceptible to growth inhibition by Cd. Our results suggest that GSH level may play a role in regulating Cd-inhibited growth of rice roots. © 1995 Kluwer Academic Publishers.
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