DOI: 10.1111/gcb.12769
论文题名: Response of wheat restricted-tillering and vigorous growth traits to variables of climate change
作者: Dias de Oliveira E.A. ; Siddique K.H.M. ; Bramley H. ; Stefanova K. ; Palta J.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 2 起始页码: 857
结束页码: 873
语种: 英语
英文关键词: Climate change components
; High-yielding traits
; Isogenic lines
; Source-sink relationships
; Tunnel houses
; Wheat
Scopus关键词: carbon dioxide
; climate change
; drought
; environmental factor
; growth response
; high temperature
; wheat
; Triticum aestivum
; carbon dioxide
; biomass
; cereal
; climate change
; drought
; growth, development and aging
; heat
; metabolism
; wheat
; Biomass
; Carbon Dioxide
; Cereals
; Climate Change
; Droughts
; Hot Temperature
; Triticum
英文摘要: The response of wheat to the variables of climate change includes elevated CO2, high temperature, and drought which vary according to the levels of each variable and genotype. Independently, elevated CO2, high temperature, and terminal drought affect wheat biomass and grain yield, but the interactive effects of these three variables are not well known. The aim of this study was to determine the effects of elevated CO2 when combined with high temperature and terminal drought on the high-yielding traits of restricted-tillering and vigorous growth. It was hypothesized that elevated CO2 alone, rather than combined with high temperature, ameliorates the effects of terminal drought on wheat biomass and grain yield. It was also hypothesized that wheat genotypes with more sink capacity (e.g. high-tillering capacity and leaf area) have more grain yield under combined elevated CO2, high temperature, and terminal drought. Two pairs of sister lines with contrasting tillering and vigorous growth were grown in poly-tunnels in a four-factor completely randomized split-plot design with elevated CO2 (700 μL L-1), high day time temperature (3 °C above ambient), and drought (induced from anthesis) in all combinations to test whether elevated CO2 ameliorates the effects of high temperature and terminal drought on biomass accumulation and grain yield. For biomass and grain yield, only main effects for climate change variables were significant. Elevated CO2 significantly increased grain yield by 24-35% in all four lines and terminal drought significantly reduced grain yield by 16-17% in all four lines, while high temperature (3 °C above the ambient) had no significant effect. A trade-off between yield components limited grain yield in lines with greater sink capacity (free-tillering lines). This response suggests that any positive response to predicted changes in climate will not overcome the limitations imposed by the trade-off in yield components. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61582
Appears in Collections: 影响、适应和脆弱性
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作者单位: CSIRO Plant Industry, Private Bag No 5, Wembley, WA, Australia; The UWA Institute of Agriculture (M082), The University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia; School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia; Plant Breeding Institute, Faculty of Agriculture and Environment, The University of Sydney, 12656 Newell Highway, Narrabri, NSW, Australia
Recommended Citation:
Dias de Oliveira E.A.,Siddique K.H.M.,Bramley H.,et al. Response of wheat restricted-tillering and vigorous growth traits to variables of climate change[J]. Global Change Biology,2015-01-01,21(2)