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DOI	10.1111/gcb.15128
	Early vigour in wheat: Could it lead to more severe terminal drought stress under elevated atmospheric [CO2] and semi-arid conditions?
	Bourgault, Maryse; Webber, Heidi A.; Chenu, Karine; O'Leary, Garry J.; Gaiser, Thomas; Siebert, Stefan; Dreccer, Fernanda; Huth, Neil; Fitzgerald, Glenn J.; Tausz, Michael; Ewert, Frank
通讯作者	Bourgault, M
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2020
卷号	26 期号:7 页码:4079-4093
英文摘要	Early vigour in wheat is a trait that has received attention for its benefits reducing evaporation from the soil surface early in the season. However, with the growth enhancement common to crops grown under elevated atmospheric CO2 concentrations (e[CO2]), there is a risk that too much early growth might deplete soil water and lead to more severe terminal drought stress in environments where production relies on stored soil water content. If this is the case, the incorporation of such a trait in wheat breeding programmes might have unintended negative consequences in the future, especially in dry years. We used selected data from cultivars with proven expression of high and low early vigour from the Australian Grains Free Air CO2 Enrichment (AGFACE) facility, and complemented this analysis with simulation results from two crop growth models which differ in the modelling of leaf area development and crop water use. Grain yield responses to e[CO2] were lower in the high early vigour group compared to the low early vigour group, and although these differences were not significant, they were corroborated by simulation model results. However, the simulated lower response with high early vigour lines was not caused by an earlier or greater depletion of soil water under e[CO2] and the mechanisms responsible appear to be related to an earlier saturation of the radiation intercepted. Whether this is the case in the field needs to be further investigated. In addition, there was some evidence that the timing of the drought stress during crop growth influenced the effect of e[CO2] regardless of the early vigour trait. There is a need for FACE investigations of the value of traits for drought adaptation to be conducted under more severe drought conditions and variable timing of drought stress, a risky but necessary endeavour.
英文关键词	climate change adaptation drought adaptive traits model intercomparison physiological pre-breeding Triticum aestivum
类型	Article
语种	英语
开放获取类型	Green Published, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000531594100001
WOS关键词	TRANSPIRATION EFFICIENCY ; GENETIC-IMPROVEMENT ; RICE GENOTYPES ; CLIMATE-CHANGE ; HEAT-STRESS ; HAYING-OFF ; YIELD ; GROWTH ; NITROGEN ; CULTIVAR
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	Commonwealth Scientific and Industrial Research Organisation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324430
作者单位	[Bourgault, Maryse] Montana State Univ, Northern Agr Res Ctr, Havre, MT USA; [Bourgault, Maryse; Fitzgerald, Glenn J.] Univ Melbourne, Fac Vet & Agr Sci, Creswick, Vic, Australia; [Webber, Heidi A.; Gaiser, Thomas; Siebert, Stefan; Ewert, Frank] Univ Bonn, Inst Crop Sci & Resource Conservat INRES, Bonn, Germany; [Webber, Heidi A.; Ewert, Frank] Leibniz Ctr Agr Landscape Res ZALF, Brandenburg, Germany; [Chenu, Karine] Univ Queensland, Queensland Alliance Agr & Food Innovat QAAFI, Toowoomba, Qld, Australia; [O'Leary, Garry J.; Fitzgerald, Glenn J.] Grains Innovat Pk, Agr Victoria, Horsham, Vic, Australia; [Siebert, Stefan] Univ Gottingen, Dept Crop Sci, Gottingen, Germany; [Dreccer, Fernanda] Univ Queensland, Agr & Food Cooper Lab, CSIRO, Gatton, Qld, Australia; [Huth, Neil] CSIRO Agr & Food, Toowoomba, Qld, Australia; [Tausz, Michael] CQ Univ, Dept Agr Sci & Environm, Norman Gardens, Qld, Australia; [Bourgault, Maryse] Univ Saskatchewan, Coll Agr & Bioresources, 51 Campus Dr, Saskatoon, SK S7N 5A0, Canada
推荐引用方式 GB/T 7714	Bourgault, Maryse,Webber, Heidi A.,Chenu, Karine,et al. Early vigour in wheat: Could it lead to more severe terminal drought stress under elevated atmospheric [CO2] and semi-arid conditions?[J]. Commonwealth Scientific and Industrial Research Organisation,2020,26(7):4079-4093.
APA	Bourgault, Maryse.,Webber, Heidi A..,Chenu, Karine.,O'Leary, Garry J..,Gaiser, Thomas.,...&Ewert, Frank.(2020).Early vigour in wheat: Could it lead to more severe terminal drought stress under elevated atmospheric [CO2] and semi-arid conditions?.GLOBAL CHANGE BIOLOGY,26(7),4079-4093.
MLA	Bourgault, Maryse,et al."Early vigour in wheat: Could it lead to more severe terminal drought stress under elevated atmospheric [CO2] and semi-arid conditions?".GLOBAL CHANGE BIOLOGY 26.7(2020):4079-4093.