Light-induced De-epoxidation in Lettuce Chloroplasts | Zendy

D. Siefermann | Zendy; Harry Y. Yamamoto | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Light-induced De-epoxidation in Lettuce Chloroplasts

Author(s) -

D. Siefermann,

Harry Y. Yamamoto

Publication year - 1976

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.57.6.939

Subject(s) - violaxanthin , thylakoid , stroma , chloroplast , biology , membrane , chloroplast stroma , chlorophyll , photosynthesis , chemistry , zeaxanthin , botany , biophysics , biochemistry , carotenoid , lutein , immunohistochemistry , gene , immunology

Grana and stroma lamellae fractions prepared from illuminated chloroplasts (Lactuca sativa L. var. Manoa) by French press treatment contained less violaxanthin and more zeaxanthin than the corresponding fractions from dark controls. In both fractions, only part of the total violaxanthin was de-epoxidized under illumination, and the ratio of de-epoxidized and unchanged violaxanthin was similar. This not only shows that the de-epoxidation system is present in both grana and stroma thylakoids but also that violaxanthin is heterogeneous in both membranes. The presence and similarity of the de-epoxidation system in grana and stroma lamellae suggest that the function of the violaxanthin cycle is linked to photosynthetic activities which are common to both types of membranes.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research