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	Yield and photosynthetic characteristics of flag leaves in Chinese rice (Oryza sativa L.) varieties subjected to free-air release of ozone
	Pang, Jing1,2; Kobayashi, Kazuhiko1; Zhu, Jianguo3
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2009-08-01
卷号	132期号:3-4页码:203-211
关键词	Rice Cultivar Ozone Free-air release Yield Gas exchange Fluorescence Chlorophyll
ISSN号	0167-8809
DOI	10.1016/j.agee.2009.03.012
通讯作者	Kobayashi, Kazuhiko(aclasman@mail.ecc.u-tokyo.ac.jp)
英文摘要	The effects of elevated O-3 concentration ([O-3]) on grain yield and photosynthetic characteristics of flag leaves in rice (Oryza sativa L.) were studied using a hybrid indica cultivar SY63 and a conventional Japonica cultivar WYJ3. Both cultivars were grown in the field under ambient (A-O-3) and elevated [O-3] (E-O-3, ambient x 1.5) using free-air O-3 enrichment in Jiangdu city, Jiangsu province, China. The E-O-3 significantly reduced above-ground biomass (p = 0.047) and grain yield (p = 0.0046), but had no significant effect on harvest index (p = 0.18) across cultivars. The hybrid Indica cultivar SY63 was more sensitive to E-O-3 than the conventional Japonica cultivar WYJ3. The above-ground biomass was reduced by 17.6% for SY63 and 6.6% for WYJ3, whereas the grain yield was reduced by 20.7% for SY63 and 6.3% for WYJ3. A barely non-significant (p = 0.079) interaction between 03 and cultivar on grain yield suggested a higher sensitivity of the hybrid variety: SY63. In SY63, flag leaves exhibited an earlier and stronger response in photosynthetic characteristics to E-O-3. Depression in light-saturated photosynthetic rate (A(sat)) was first observed at 237 day of year (DOY) in SY63, and the seasonal mean A(sat) was reduced by 23.1%. In contrast, for WYJ3, the conventional cultivar, the impact of E-O-3 on A(sat) was negligible until 266 DOY, and seasonal mean decrease of A(sat) was only 9.4%. The same trend was found in chlorophyll a fluorescence parameters. In SY63, actual quantum yield of PSII (p = 0.007) and q(p) (photochemical quenching) (p=0.002) were significantly decreased at 248 DOY and the downward trends persisted throughout the rest of the life span of flag leaves. No such changes were observed in WYJ3. In the ozonated flag leaves of SY63, necrotic damages occurred and chlorophyll contents declined significantly by 12.6-43.6% through the entire functional duration of the leaf. As for WYJ3, chlorophyll remained unaffected until a 25.7% decrease appeared at 278 DOY under E-O-3. The observed yield losses were compared with those estimated from two existing exposure-yield loss relationships for rice. The yield loss in SY63 was much greater than either estimate, whereas that in WYJ3 was comparable to one estimate but was moderately larger than the other. This warrants further studies with a much larger number of varieties. Open-air O-3 release would serve as the best platform for such a large-scale screening of rice varieties to increasing [O-3]. (C) 2009 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	GROUND-LEVEL OZONE ; SPRING WHEAT ; RESPONSE RELATIONSHIPS ; CHANGING CLIMATE ; YANGTZE DELTA ; SURFACE OZONE ; WINTER-WHEAT ; GRAIN-YIELD ; CROP YIELDS ; CULTIVARS
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000267481300003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558769
专题	南京土壤研究所
通讯作者	Kobayashi, Kazuhiko
作者单位	1.Univ Tokyo, Dept Global Agr Sci, Grad Sch Agr & Life Sci, Bunkyo Ku, Tokyo 1138657, Japan 2.Hubei Univ, Acad Resource & Environment, Wuhan 430064, Peoples R China 3.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Pang, Jing,Kobayashi, Kazuhiko,Zhu, Jianguo. Yield and photosynthetic characteristics of flag leaves in Chinese rice (Oryza sativa L.) varieties subjected to free-air release of ozone[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2009,132(3-4):203-211.
APA	Pang, Jing,Kobayashi, Kazuhiko,&Zhu, Jianguo.(2009).Yield and photosynthetic characteristics of flag leaves in Chinese rice (Oryza sativa L.) varieties subjected to free-air release of ozone.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,132(3-4),203-211.
MLA	Pang, Jing,et al."Yield and photosynthetic characteristics of flag leaves in Chinese rice (Oryza sativa L.) varieties subjected to free-air release of ozone".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 132.3-4(2009):203-211.

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