Differences between Maize and Wheat for Non-photochemical Quenching （qN） during Photosynthetic Induction

CORC > 中国农业科学院 > 作物科学研究所

	Differences between Maize and Wheat for Non-photochemical Quenching （qN） during Photosynthetic Induction
	ZHAO Ming 1; Jiang Wen 2; Ding Zaisong 1; Ryusichi Ishill 3; Chen Li 3
刊名	作物学报
	2005
卷号	31 期号:12 页码:1544-1551
关键词	Maize （ Zea mays L. ） Wheat （ Tnlticum aestivum L. ） Photosynthesis Non-photochemical quenching of chlorophyll fluorescence
ISSN号	0496-3490
其他题名	玉米和小麦在光合诱导期间非光化学猝灭（qN）差异
英文摘要	In order to compare the difference between maize （ Zea mays L. ） and wheat （ Triticum aestivum L. ） in response to adaptation from dark to light, the dynamics of non-photochemical quenching （ qN ） were observed and analyzed during photosynthetic induction. The results showed that the dynamics of qN could be classified into three types, which were F- form, M-form and S-form. During the dark adaptation from 15 minutes to 24 hours, wheat had F-form and M-form, while M-form and S-form were showed in maize. There was no marked difference between maize and wheat in Fv/Fm, qp and ФPSⅡ , while apparent difference existed in qN , and the time of reaching the maximum and steady-state of qN （expressed as TqNmax and TqN, respectively）, which were new parameters defined here, was markedly higher in maize leaves than in wheat leaves when illumination occurred after dark adaptation. However, there was no apparent difference between maize and wheat in the time needed to reach the steady-state of photosynthetic rate （Pn） and stomatal conductance （ Gs） under 1 600 μmol· m^-2·s^-1 light intensity after dark adaptation. Meanwhile, the limitation of CO2 supplied to leaves with plastic film sealing up the leaves in a short period （less than 30 min） had a minimal effect on the dynamics of qN , which implied that the different dynamics did not result from the start of CO2 assimilation or stomatal regulation. The measurement of the typical pattern for oxidation-reduction of P700 and the estimate of the functional pool size of intersystem electrons per reaction center supported our belief that the redox state of P700 in PS T and the pool size of the intersystem were not the main factors that led to great differences in dynamics of qN between maize and wheat. However, the analysis of the qN component showed that high-energy state quenching （q E ）, state transitional quenching （qT） and photoinhibitory quenching （q 1） were 55.6%, 18.5%, and 25.9% of qN when reaching qNmax, respectively, which meant it might be qE that resulted in the different dynamics of qN between maize and wheat. The results suggested that maize （C4） might have a higher qE to maintain the proton gradient of thylakoid than wheat （ C3 ） for adapting to the transition from dark to light and to initiate the use of NADPH and ATP by carbon fixation during photosynthetic induction.
学科主题	植物学
语种	英语
内容类型	期刊论文
源URL	[http://ir.nais.net.cn/handle/2HMLN22E/131220]
专题	作物科学研究所
作者单位	1.Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081; 2.Laiyang Agricultural College, Shandong, Qingdao, 266109; 3.Crops Science Laboratory, Graduate School of Agricultural and Life Science Faculty, Tokyo University, Tokyo
推荐引用方式 GB/T 7714	ZHAO Ming,Jiang Wen,Ding Zaisong,等. Differences between Maize and Wheat for Non-photochemical Quenching （qN） during Photosynthetic Induction[J]. 作物学报,2005,31(12):1544-1551.
APA	ZHAO Ming,Jiang Wen,Ding Zaisong,Ryusichi Ishill,&Chen Li.(2005).Differences between Maize and Wheat for Non-photochemical Quenching （qN） during Photosynthetic Induction.作物学报,31(12),1544-1551.
MLA	ZHAO Ming,et al."Differences between Maize and Wheat for Non-photochemical Quenching （qN） during Photosynthetic Induction".作物学报 31.12(2005):1544-1551.