Photoinactivation of Photosystem II in wild-type and chlorophyll b-less barley leaves: which mechanism dominates depends on experimental circumstances

doi:10.1007/s11120-015-0167-0

	Photoinactivation of Photosystem II in wild-type and chlorophyll b-less barley leaves: which mechanism dominates depends on experimental circumstances
	He, Jie ; Yang, Wenquan 1; Qin, Lin ; Fan, Da-Yong ; Chow, Wah Soon 3
	2015
发表期刊	PHOTOSYNTHESIS RESEARCH
ISSN	0166-8595
卷号	126 期号:2-3 页码:399-407
摘要	Action spectra of photoinactivation of Photosystem II (PS II) in wild-type and chlorophyll b-less barley leaf segments were obtained. Photoinactivation of PS II was monitored by the delivery of electrons from PS II to PS I following single-turnover flashes superimposed on continuous far-red light, the time course of photoinactivation yielding a rate coefficient k (i). Susceptibility of PS II to photoinactivation was quantified as the ratio of k (i) to the moderate irradiance (I) of light at each selected wavelength. k (i)/I was very much higher in blue light than in red light. The experimental conditions permitted little excess light energy absorbed by chlorophyll (not utilized in photochemical conversion or dissipated in controlled photoprotection) that could lead to photoinactivation of PS II. Therefore, direct absorption of light by Mn in PS II, rather than by chlorophyll, was more likely to have initiated the much more severe photoinactivation in blue light than in red light. Mutant leaves were ca. 1.5-fold more susceptible to photoinactivation than the wild type. Neither the excess-energy mechanism nor the Mn mechanism can explain this difference. Instead, the much lower chlorophyll content of mutant leaves could have exerted an exacerbating effect, possibly partly due to less mutual shading of chloroplasts in the mutant leaves. In general, which mechanism dominates depends on the experimental conditions.
关键词	Chlorophyll fluorescence P700 Photosystem II Photoinactivation of Photosystem II Photoinhibition
学科领域	Plant Sciences
DOI	10.1007/s11120-015-0167-0
收录类别	SCI
语种	英语
WOS关键词	OXYGEN-EVOLVING COMPLEX ; CAPSICUM-ANNUUM ; PROTEIN-DEGRADATION ; SINGLET OXYGEN ; LIGHT ENERGY ; IN-VIVO ; PHOTOINHIBITION ; FLUORESCENCE ; PHOTODAMAGE ; EXCITATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000362006900019
出版者	SPRINGER
Special Issue	SI
文献子类	Article
出版地	DORDRECHT
EISSN	1573-5079
资助机构	Singapore Millennium Fund ; ARC [DP120100872] ; Chinese Academy of Sciences [KZCX2-XB3-09] ; National Natural Science Foundation [31070356]
作者邮箱	Fred.Chow@anu.edu.au
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25797
专题	植被与环境变化国家重点实验室
作者单位	1.Nanyang Technol Univ, Natl Inst Educ, Nat Sci & Sci Educ, Singapore 637616, Singapore 2.Northwest A&F Univ, Coll Life Sci, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Australian Natl Univ, Div Plant Sci, Res Sch Biol, Canberra, ACT 2601, Australia
推荐引用方式 GB/T 7714	He, Jie,Yang, Wenquan,Qin, Lin,et al. Photoinactivation of Photosystem II in wild-type and chlorophyll b-less barley leaves: which mechanism dominates depends on experimental circumstances[J]. PHOTOSYNTHESIS RESEARCH,2015,126(2-3):399-407.
APA	He, Jie,Yang, Wenquan,Qin, Lin,Fan, Da-Yong,&Chow, Wah Soon.(2015).Photoinactivation of Photosystem II in wild-type and chlorophyll b-less barley leaves: which mechanism dominates depends on experimental circumstances.PHOTOSYNTHESIS RESEARCH,126(2-3),399-407.
MLA	He, Jie,et al."Photoinactivation of Photosystem II in wild-type and chlorophyll b-less barley leaves: which mechanism dominates depends on experimental circumstances".PHOTOSYNTHESIS RESEARCH 126.2-3(2015):399-407.

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