Abstract
Chlorophyll deficient mutants are appropriate model objects for a large number of investigations in the field of photosynthesis. In this study, we identified a state of Photosystem I (PSI) and Photosystem II (PSII) photochemistry and light responses of the sunflower yellow-green mutant line - en:chlorina-7, wherein mutations in chloroplast genes have been previously localized. The conducted research revealed low content of photo-oxidizable PSI and an impaired quantum yield of PSII photochemistry in the en:chlorina-7 line as compared with a wild type. Disturbances of PSI and PSII in yellow-green plastome mutant line of sunflower (en:chlorina-7) are associated with mutations in psaA and psbB, respectively.
Highlights
Chlorophyll (Chl) deficient mutants are the classic model objects for exploring the molecular mechanisms of photosynthetic apparatus biogenesis as well as the chloroplast development on the whole (Rassadina et al, 2005; Wang et al, 2014)
The Pm value depends on a maximum amount of the photooxidizable P700, which is a parameter representing an amount of efficient Photosystem I (PSI) complexes (Huang et al, 2010)
Fm - one of the main Photosystem II (PSII) fluorescence parameters was reduced only on 10% in mutant plants
Summary
Chlorophyll (Chl) deficient mutants are the classic model objects for exploring the molecular mechanisms of photosynthetic apparatus biogenesis as well as the chloroplast development on the whole (Rassadina et al, 2005; Wang et al, 2014). Most of such kind researches are carried out on mutants with yellow-green leaf color, so called «chlorina phenotype» (Li et al, 2013; Brestic et al, 2015). Extranuclear chlorophyll mutants are an appropriate model for investigating the interactions between organelles and nuclear genomes
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