Photosystem 2 photochemistry and pigment composition of a yellow mutant of rice (Oryza sativa L.) under different irradiances

doi:10.1007/s11099-008-0007-y

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	Photosystem 2 photochemistry and pigment composition of a yellow mutant of rice (Oryza sativa L.) under different irradiances
	Chen, Q.1; Wang, L. F.1; Su, N.1; Qin, H. D.2; Niu, H. B.2; Wang, J. L.1; Zhai, H. Q.1; Wan, J. M.1,2
刊名	PHOTOSYNTHETICA
	2008
卷号	46 期号:1 页码:35-39
关键词	beta-carotene chlorophyll photochemical and non-photochemical quenching xanthophyll cycle
ISSN号	0300-3604
DOI	10.1007/s11099-008-0007-y
通讯作者	Chen, Q.
英文摘要	A yellow leaf colouration mutant (named ycm) generated from rice T-DNA insertion lines was identified with less grana lamellae and low thylakoid membrane protein contents. At weak irradiance [50 mu mol(photon) m(-2) s(-1)], chlorophyll (Chl) contents of ycm were approximate to 20 % of those of WT and Chl a/b ratios were 3-fold that of wild type (WT). The leaf of ycm showed lower values in the actual photosystem 2 (PS2) efficiency (Phi(PS2)), photochemical quenching (q(P)), and the efficiency of excitation capture by open PS2 centres 1 (F-v'/F-m') than those of WT, except no difference in the maximal efficiency of PS2 photochemistry (F-v/F-m). With progress in irradiance [100 and 200 mu mol(photon) m(-2) s(-1)], there was a change in the photosynthetic pigment stoichiometry. In ycm, the increase of total Chl contents and the decrease in Chl a/b ratio were observed. Phi(PS2), q(P), and F-v'/F-m' of ycm increased gradually along with the increase of irradiance but still much less than in WT. The increase of xanthophyll ratio [(Z+A)/(V+A+Z)] associated with non-photochemical quenching (q(N)) was found in ycm which suggested that ycm dissipated excess energy through the turnover of xanthophylls. No significant differences in pigment composition were observed in WT under various irradiances, except Chl a/b ratio that gradually decreased. Hence the ycm mutant developed much more tardily than WT, which was caused by low photon energy utilization independent of irradiance.
学科主题	Plant Sciences ; PLANT SCIENCES
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000253976500007
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5624]
专题	作物科学研究所
作者单位	1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China 2.Nanjing Agr Univ, Jiangsu Plant Gene Engn Res Ctr, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
推荐引用方式 GB/T 7714	Chen, Q.,Wang, L. F.,Su, N.,et al. Photosystem 2 photochemistry and pigment composition of a yellow mutant of rice (Oryza sativa L.) under different irradiances[J]. PHOTOSYNTHETICA,2008,46(1):35-39.
APA	Chen, Q..,Wang, L. F..,Su, N..,Qin, H. D..,Niu, H. B..,...&Wan, J. M..(2008).Photosystem 2 photochemistry and pigment composition of a yellow mutant of rice (Oryza sativa L.) under different irradiances.PHOTOSYNTHETICA,46(1),35-39.
MLA	Chen, Q.,et al."Photosystem 2 photochemistry and pigment composition of a yellow mutant of rice (Oryza sativa L.) under different irradiances".PHOTOSYNTHETICA 46.1(2008):35-39.