Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis

Hideyuki Takahashi; Ayako Watanabe; Ayumi Tanaka; Shin Nosuke Hashida; Maki Kawai-Yamada; Kintake Sonoike; Hirofumi Uchimiya

doi:10.1093/pcp/pcl029

Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis

Hideyuki Takahashi^*, Ayako Watanabe, Ayumi Tanaka, Shin Nosuke Hashida, Maki Kawai-Yamada, Kintake Sonoike, Hirofumi Uchimiya

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

58 Citations (Scopus)

Abstract

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 (ΦII) 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.

Original language	English
Pages (from-to)	1678-1682
Number of pages	5
Journal	Plant and Cell Physiology
Volume	47
Issue number	12
DOIs	https://doi.org/10.1093/pcp/pcl029
Publication status	Published - 2006 Dec
Externally published	Yes

Keywords

Arabidopsis thaliana
Energy dissipation
NAD kinase
PSII
Xanthophyll cycle

ASJC Scopus subject areas

Physiology
Plant Science
Cell Biology

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10.1093/pcp/pcl029

Cite this

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title = "Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis",

abstract = "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 (ΦII) 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.",

keywords = "Arabidopsis thaliana, Energy dissipation, NAD kinase, PSII, Xanthophyll cycle",

author = "Hideyuki Takahashi and Ayako Watanabe and Ayumi Tanaka and Hashida, {Shin Nosuke} and Maki Kawai-Yamada and Kintake Sonoike and Hirofumi Uchimiya",

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doi = "10.1093/pcp/pcl029",

language = "English",

volume = "47",

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T1 - Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis

AU - Takahashi, Hideyuki

AU - Watanabe, Ayako

AU - Tanaka, Ayumi

AU - Hashida, Shin Nosuke

AU - Kawai-Yamada, Maki

AU - Sonoike, Kintake

AU - Uchimiya, Hirofumi

PY - 2006/12

Y1 - 2006/12

N2 - 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 (ΦII) 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.

AB - 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 (ΦII) 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.

KW - Arabidopsis thaliana

KW - Energy dissipation

KW - NAD kinase

KW - PSII

KW - Xanthophyll cycle

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JO - Plant and Cell Physiology

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Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis

Abstract

Keywords

ASJC Scopus subject areas

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