Control of plant growth and water loss by a lack of light-harvesting complexes in photosystem-II in Arabidopsis thaliana ch1-1 mutant

Jahan , Md Sarwar and Nozulaid, Mohd and Khandaker, Mohammad Moneruzzaman and Afifah, Ainun (2014) Control of plant growth and water loss by a lack of light-harvesting complexes in photosystem-II in Arabidopsis thaliana ch1-1 mutant. Acta Physiologiae Plantarum, 36 (7). pp. 1627-1635. ISSN 0137-5881 (Print) 1861-1664 (Online)

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Abstract

The chlorinal-1 (ch1-1) mutant of Arabidopsis thaliana lacks the light-harvesting complexes in photosystem II (LHCII) due to deficiency of ability to synthesize chlorophyll (Chl) b. To investigate if a lack of LHCII affects plant growth and water loss, the Chl content, Chl fluorescence, glutathione (GSH) content, plant growth, water loss and stomatal aperture were measured using wild-type (WT) and ch1-1 mutant plants. The leaves of ch1-1 mutants accumulated significantly lower Chl content, Chl fluorescence and GSH content than WT plants. Plant growth and the leaf area of ch1-1 plants were also lower when compared to WT plants. The ch1-1 plant showed delayed flowering and higher a number of rosette leaves compared to the WT plants. The treatment of N-acetyl-cysteine increased Chl content and Chl fluorescence in leaves of both plants. Stomatal aperture was significantly lower in guard cells of the ch1-1 mutant than that of WT plants. Dark treatment increased stomatal closure which was corrected followed by the light treatment. Abscisic acid (ABA)-induced stomatal aperture was significantly lower in ch1-1 mutant than WT plants. Water loss through stomatal opening in ch1-1 plants was significantly lower than WT plants regardless of ABA treatment. This study suggests that a lack of LHCII might control plant growth and water loss in ch1-1 mutant of Arabidopsis thaliana.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Faculty / Institute: Faculty of Bioresources & Food Industry
Depositing User: Dr. Md Sarwar Jahan
Date Deposited: 19 Oct 2014 07:41
Last Modified: 23 Oct 2015 23:41
URI: http://erep.unisza.edu.my/id/eprint/616

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