Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification

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	Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification
	Wang, Liang; Pang, Jing; Feng, Zhaozhong; Zhu, Jianguo; Kobayashi, Kazuhiko
刊名	ENVIRONMENTAL POLLUTION
	2015-11
卷号	207 页码:413-419
关键词	Apoplast Ascorbate Detoxification Ozone Triticum aestivum L
英文摘要	Besides stomatal closure, biological detoxification is an important protection mechanism for plants against ozone (O-3). This study investigated the diurnal changes of ascorbate (a major detoxification agent) in the apoplast and leaf tissues of winter wheat grown under ambient air field conditions. Results showed the reduced ascorbate in the apoplast (ASC(apo)) exhibited a peak in late morning or midday, mismatching with either the maximum external O-3 concentrations in mid-afternoon or the maximum stomatal O-3 uptake between late morning and mid-afternoon. In contrast, the ASC in leaf tissues remained stable throughout the day. The investigations conducted in a Free-Air Concentration Elevation of O-3 system confirmed that the diurnal variations of the ASC(apo) were induced more by the daily variations of O-3 concentrations rather than the cumulative O-3 effects. In conclusion, the O-3-stress detoxification should be a dynamic variable rather than a fixed threshold as assumed in the stomatal flux-based O-3 dose metrics. (C) 2015 Elsevier Ltd. All rights reserved.
研究领域[WOS]	Environmental Sciences
WOS记录号	WOS:000366617500047
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32289]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Liang,Pang, Jing,Feng, Zhaozhong,et al. Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification[J]. ENVIRONMENTAL POLLUTION,2015,207:413-419.
APA	Wang, Liang,Pang, Jing,Feng, Zhaozhong,Zhu, Jianguo,&Kobayashi, Kazuhiko.(2015).Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification.ENVIRONMENTAL POLLUTION,207,413-419.
MLA	Wang, Liang,et al."Diurnal variation of apoplastic ascorbate in winter wheat leaves in relation to ozone detoxification".ENVIRONMENTAL POLLUTION 207(2015):413-419.