Short-term responses of photoprotective mechanisms to artificial photoinhibition in Arabidopsis thaliana

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Authors

LANG Jaroslav CEMPÍRKOVÁ Hana VEČEŘOVÁ Kristýna BARTÁK Miloš

Year of publication 2008
Type Article in Proceedings
Conference International Conference of PhD Students on Experimental Botany: Book of abstracts
MU Faculty or unit

Faculty of Science

Citation
Field Botany
Keywords photoinhibition; <Arabidopsis thaliana>; chlorophyll fluorescence; antioxidants
Description In our study, we investigated nonphotochemical quenching of absorbed light energy in Arabidopsis thaliana in violaxanthin deepoxidase- and zeaxanthin epoxidase-deficient mutants (npq1-2 and npq2-1 mutant, respectively). We studied also mutants that have reduced amount of protein subunits that form the light harvesting complexes of photosystem II (lhc2-1) and lacking practically all of them (lhc2-12). The main objective of our study was to quantify plant response, primary photosynthetic processes in particular, to high light doses.The results indicate that reduced amount of light harvesting complexes may alter zeaxantin formation while amount of other photoprotective and antioxidative compounds may be unaffected.
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