Glutathione counteracts the inhibitory effect induced by cadmium on photosynthetic process in soybean

Title:

Glutathione counteracts the inhibitory effect induced by cadmium on photosynthetic process in soybean

Creator:

El-Shintinawy, F.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2ec6ac7a-de91-4be9-b715-678ed998fc71
uuid:2ec6ac7a-de91-4be9-b715-678ed998fc71
issn:0300-3604
doi:10.1023/A:1007087224559

Subject:

carotenoids, chlorophyll, ethylene, fluorescence, emission spectra, fresh and dry mass of roots and shoots, Glycine, leaf and root dimensions, lipid peroxidation, and photosystem 2

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In soybean seedlings, Cd2+ affected growth and inhibited photosynthesis. Both the length and fresh mass decreased more in roots than in shoots. Cd2+ stress caused an increase in ratio of chlorophyll (Chl) (a+b)/b by 1.3 fold and ratio of total xanthophylls/β-carotene by 3 fold compared to the control. A reduced activity of photosystem 2 by about 85 % measured in Cd2+-treated chloroplasts was associated with a dramatic quenching of fluorescence emission intensity, with a band shift of 4 nm. A major suppression of absorption was accompanied with shift in peaks in the visible region of the spectrum. In Cd2+-treated chloroplasts a selective decline in linolenic acid (18:3), the most unsaturated fatty acid of chloroplasts, paralleled with the ten fold enhancement in ethylene production. A three fold increase in peroxidase activity was found in chloroplasts treated with Cd2+ compared to the control . Addition of 1 mM glutathione (GSH) counteracted all the retardation effects in soybean seedling growth induced by Cd2+. Thus GSH may control the Cd2+ growth inhibition as it detoxifies Cd2+ by reducing its concentration in the cytoplasm and removing hydrogen peroxide generated in chloroplasts.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

171-179

Source:

Photosynthetica | 1999 Volume:36 | Number:1-2

Harvested from:

CDK

Metadata only:

false