Genotypically Identifying Wheat Mesophyll Conductance Regulation under Progressive Drought Stress

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	Genotypically Identifying Wheat Mesophyll Conductance Regulation under Progressive Drought Stress
	Olsovska, K; Kovar, M; Brestic, M; Zivcak, M; Slamka, P; Shao, HB
刊名	Frontiers in Plant Science
	2016-08-08
卷号	7
关键词	photosynthesis drought mesophyll conductance A(N)/C-i carboxylation efficiency wheat
ISSN号	1664-462X
通讯作者	Brestic, M ; Shao, HB (reprint author), Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Prov Key Lab Agrobiol, Jiangsu Key Lab Bioresources Saline Soils, Nanjing, Jiangsu, Peoples R China. ; Brestic, M (reprint author), Slovak Univ Agr Nitia, Fac Agrobiol & Food Resources, Dept Plant Physiol, Nitra, Slovakia. ; Shao, HB (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai, Peoples R China. Email:marian.brestic@gmail.com ; shaohongbochu@126.com
产权排序	[Olsovska, Katarina; Brestic, Marian; Shao, Hong Bo] Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Prov Key Lab Agrobiol, Jiangsu Key Lab Bioresources Saline Soils, Nanjing, Jiangsu, Peoples R China; [Olsovska, Katarina; Kovar, Marek; Brestic, Marian; Zivcak, Marek] Slovak Univ Agr Nitia, Fac Agrobiol & Food Resources, Dept Plant Physiol, Nitra, Slovakia; [Slamka, Pavol] Slovak Univ Agr Nitia, Fac Acrobiol & Food Resources, Dept Agrochem & Plant Nutr, Nitra, Slovakia; [Shao, Hong Bo] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai, Peoples R China
英文摘要	Photosynthesis limitation by CO2 flow constraints from sub-stomatal cavities to carboxylation sites in chloroplasts under drought stress conditions is, at least in some plant species or crops not fully understood, yet. Leaf mesophyll conductance for CO2 (gm) may considerably affect both photosynthesis and water use efficiency (WUE) in plants under drought conditions. The aim of our study was to detect the responses of gm in leaves of four winter wheat (Triticum aestivum L.) genotypes from different origins under long-term progressive drought. Based on the measurement of gas exchange parameters the variability of genotypic responses was analyzed at stomata' (stomata closure) and non-stomatal (diffusional and biochemical) limits of net CO2 assimilation rate (AN). In general, progressive drought caused an increasing leaf diffusion resistance against CO2 flow leading to the decrease of AN, gm and stomatal conductance (g(s)), respectively. Reduction of gm also led to inhibition of carboxylation efficiency (Vc(max)). On the basis of achieved results a strong positive relationship between g(m) and g(s), was found out indicating a co regulation and mutual independence of the relationship under the drought conditions. In severely stressed plants, the stomatal limitation of the CO2 assimilation rate was progressively increased, but to a less extent in comparison to gm, while a non-stomatal limitation became more dominant due to the prolonged drought. Mesophyll conductance (g(m)) seems to be a suitable mechanism and parameter for selection of improved diffusional properties and photosynthetic carbon assimilation in 03 plants, thus explaining their better photosynthetic performance at a whole plant level during periods of drought.
研究领域[WOS]	Plant Sciences
关键词[WOS]	WATER-USE EFFICIENCY ; CARBON-ISOTOPE DISCRIMINATION ; PHOTOSYNTHETIC ELECTRON-TRANSPORT ; CO2 TRANSFER CONDUCTANCE ; EVERGREEN QUERCUS-ILEX ; LEAF GAS-EXCHANGE ; DIFFUSION CONDUCTANCE ; INTERNAL CONDUCTANCE ; C-3 PLANTS ; NONSTOMATAL LIMITATIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000380922400001
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/17026]
专题	烟台海岸带研究所_海岸带生物学与生物资源利用所重点实验室
推荐引用方式 GB/T 7714	Olsovska, K,Kovar, M,Brestic, M,et al. Genotypically Identifying Wheat Mesophyll Conductance Regulation under Progressive Drought Stress[J]. Frontiers in Plant Science,2016,7.
APA	Olsovska, K,Kovar, M,Brestic, M,Zivcak, M,Slamka, P,&Shao, HB.(2016).Genotypically Identifying Wheat Mesophyll Conductance Regulation under Progressive Drought Stress.Frontiers in Plant Science,7.
MLA	Olsovska, K,et al."Genotypically Identifying Wheat Mesophyll Conductance Regulation under Progressive Drought Stress".Frontiers in Plant Science 7(2016).