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Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis.
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- معلومة اضافية
- المصدر:
Publisher: Oxford University Press Country of Publication: Japan NLM ID: 9430925 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0032-0781 (Print) Linking ISSN: 00320781 NLM ISO Abbreviation: Plant Cell Physiol Subsets: MEDLINE
- بيانات النشر:
Publication: Tokyo : Oxford University Press
Original Publication: Kyoto, Japan : Japanese Society of Plant Physiologists,
- الموضوع:
- نبذة مختصرة :
Photosynthetic parameters of the nadk2 mutant of Arabidopsis thaliana, which is defective in chloroplast NAD kinase, were investigated. In this plant, the effective efficiency of photosynthetic electron transport (PhiII) and the quantum yield of open reaction centers of photosystem II (Fv'/Fm') were decreased. Furthermore, an increase in non-photochemical quenching attributed to energy dissipation from the xanthophyll cycle was observed. The mutant showed an aberrant de-epoxidation state of xanthophyll cycle carotenoids and had a high level of zeaxanthin even under low light conditions. These results indicate that chloroplast NAD kinase, catalyzing phosphorylation of NAD, is essential for the proper photosynthetic machinery of PSII and the xanthophyll cycle.
- الرقم المعرف:
0 (Arabidopsis Proteins)
0 (Photosystem II Protein Complex)
0 (Xanthophylls)
0 (Zeaxanthins)
36-88-4 (Carotenoids)
EC 2.7.1.- (Phosphotransferases (Alcohol Group Acceptor))
EC 2.7.1.23 (NAD kinase)
EC 2.7.1.23 (NADK2 protein, Arabidopsis)
- الموضوع:
Date Created: 20061104 Date Completed: 20070410 Latest Revision: 20141120
- الموضوع:
20221213
- الرقم المعرف:
10.1093/pcp/pcl029
- الرقم المعرف:
17082216
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