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Response of wheat restricted-tillering and vigorous growth traits to variables of climate change.
Glob Chang Biol 2015; 21(2):857-73GC

Abstract

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.

Authors+Show Affiliations

CSIRO Plant Industry, Private Bag No 5, Wembley, WA, 6913, Australia; The UWA Institute of Agriculture (M082), The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia; School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25330325

Citation

Dias de Oliveira, Eduardo A., et al. "Response of Wheat Restricted-tillering and Vigorous Growth Traits to Variables of Climate Change." Global Change Biology, vol. 21, no. 2, 2015, pp. 857-73.
Dias de Oliveira EA, Siddique KH, Bramley H, et al. Response of wheat restricted-tillering and vigorous growth traits to variables of climate change. Glob Chang Biol. 2015;21(2):857-73.
Dias de Oliveira, E. A., Siddique, K. H., Bramley, H., Stefanova, K., & Palta, J. A. (2015). Response of wheat restricted-tillering and vigorous growth traits to variables of climate change. Global Change Biology, 21(2), pp. 857-73. doi:10.1111/gcb.12769.
Dias de Oliveira EA, et al. Response of Wheat Restricted-tillering and Vigorous Growth Traits to Variables of Climate Change. Glob Chang Biol. 2015;21(2):857-73. PubMed PMID: 25330325.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Response of wheat restricted-tillering and vigorous growth traits to variables of climate change. AU - Dias de Oliveira,Eduardo A, AU - Siddique,Kadambot H M, AU - Bramley,Helen, AU - Stefanova,Katia, AU - Palta,Jairo A, Y1 - 2014/12/12/ PY - 2014/05/07/received PY - 2014/08/24/revised PY - 2014/08/29/accepted PY - 2014/10/21/entrez PY - 2014/10/21/pubmed PY - 2015/10/23/medline KW - climate change components KW - high-yielding traits KW - isogenic lines KW - source-sink relationships KW - tunnel houses KW - wheat SP - 857 EP - 73 JF - Global change biology JO - Glob Chang Biol VL - 21 IS - 2 N2 - 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. SN - 1365-2486 UR - https://www.unboundmedicine.com/medline/citation/25330325/Response_of_wheat_restricted_tillering_and_vigorous_growth_traits_to_variables_of_climate_change_ L2 - https://doi.org/10.1111/gcb.12769 DB - PRIME DP - Unbound Medicine ER -