Abstract:
:Bienertia sinuspersici performs single cell C4 photosynthesis without Kranz anatomy. Peripheral and central cytoplasmic compartments in a single chlorenchyma cell act as mesophyll cells and bundle sheath cells. Development of this specialized mechanism is gradual during plant development. Young leaves perform C3 photosynthesis, while mature leaves have complete C4 cycle. The aim of this work was to investigate changes in redox regulation and antioxidant defence during transition from C3 to single cell C4 photosynthesis in B. sinuspersici leaves. First, we confirmed gradual development of C4 with protein blot and qRT-PCR analysis of C4 enzymes. After this activities and isoenzymes of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), ascorbate peroxidase (APX), glutathione reductase (GR), dehydroascorbate reductase (DHAR) and H2O2 and TBARS and glutathione pool and redox status (GSH/GSSG) were determined in young, developing and mature leaves during transition from C3 to single cell C4 photosynthesis. Activities of SOD, APX and POX decrease, while GR and DHAR were increased. However, most striking results were the changes in isoenzyme patterns of SOD, CAT and GR which were gradual through transition to C4 photosynthesis.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Uzilday B,Ozgur R,Yalcinkaya T,Turkan I,Sekmen AHdoi
10.1016/j.jplph.2017.10.006subject
Has Abstractpub_date
2018-01-01 00:00:00pages
1-10eissn
0176-1617issn
1618-1328pii
S0176-1617(17)30258-4journal_volume
220pub_type
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