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Decreased photochemical efficiency of Photosystem II following sunlight exposure of shade-grown leaves of avocado (Persea americana Mill.): because of, or in spite of, two kinetically distinct xanthophyll cycles?

Chow, Wah Soon; Jia, Husen; Förster, Britta; Pogson, Barry James; Osmond, Barry

Description

This study resolved correlations between changes in xanthophyll pigments and photosynthetic properties in attached and detached shade-grown avocado (Persea americana) leaves upon sun exposure. Lutein epoxide (Lx) was deepoxidized to lutein (L), increasing the total pool by DL over 5 h, whereas violaxanthin (V) conversion to antheraxanthin (A) and zeaxanthin (Z) ceased after 1 h. During subsequent dark or shade recovery, de novo synthesis of L and Z continued, followed by epoxidation of A...[Show more]

CollectionsANU Research Publications
Date published: 2013-02
Type: Journal article
URI: http://hdl.handle.net/1885/11621
Source: Plant Physiology 161 (2013): 836–852
DOI: 10.1104/pp.112.209692

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