Inhibition of chiorophyll synthesis by selenium: involvement of lipoxygenase mediated lipid peroxidation and antioxidant enzymes

Title:

Inhibition of chiorophyll synthesis by selenium: involvement of lipoxygenase mediated lipid peroxidation and antioxidant enzymes

Creator:

Padmaja, K., Somasekharaiah, B.V., and Prasad, A.R.K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:39ae5c1b-9f77-411e-8fbf-ecc5d9d9c662
uuid:39ae5c1b-9f77-411e-8fbf-ecc5d9d9c662
urnnbn:urn:nbn:cz:aba007-000fmk

Type:

model:internalpart and TEXT

Format:

print

Description:

Chlorophyll (Chl) biosynthesis intermediate compounds (like protoporphyrin-IX, Mg-protoporphyrin methyl ester and protochlorophyllide), Chl {a + h), heme, cytochrome P-450 (cyt P-450) and lipid peroxide levels as well as the activities of superoxide dismutase, catalase and lipoxygenase were studied in selenium treated mung beán seedlings. Chl (a -t- b) content and heme levels were decreased with a concomitant accumulation of all the three porphyrins studied. Se treatment enhanced the lipoxygenase activity and correspondingly increased lipid peroxide levels. Se inhibited both the antioxidant enzymes catalase and superoxide dismutase in a dose- dependent manner. However, cyt P-450 levels were enhanced under Se exposure. Hence the inhibitory effect of Se on Chl synthesis is not only by acting on constituent biosynthetic enzymes but also through lipoxygenase-mediated lipid peroxide levels and inhibition of antioxidant defence component systém.

Language:

Multiple languages

Rights:

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

Coverage:

1-7 and 3-9

Source:

Photosynthetica | 1995 Volume:31 | Number:1

Harvested from:

CDK

Metadata only:

false