Short-term responses of photoprotective mechanisms to artificial photoinhibition in Arabidopsis thaliana
| Authors | |
|---|---|
| Year of publication | 2008 |
| Type | Article in Proceedings |
| Conference | International Conference of PhD Students on Experimental Botany: Book of abstracts |
| MU Faculty or unit | |
| 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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