Cited by 114Plant responses to elevated CO2Climate change impacts on agriculturePlant Stress Responses and Tolerance

Can elevated CO2 combined with high temperature ameliorate the effect of terminal drought in wheat?

Dias de Oliveira, Eduardo, Bramley, Helen, Siddique, Kadambot H. M., Henty, Samuel, Berger, Jens, Palta, Jairo A.·2013·Functional Plant Biology

Abstract

Wheat (Triticum aestivum L.) production may be affected by the future climate, but the impact of the combined increases in atmospheric CO2 concentration, temperature and incidence of drought that are predicted has not been evaluated. The combined effect of elevated CO2, high temperature and terminal drought on biomass accumulation and grain yield was evaluated in vigorous (38-19) and nonvigorous (Janz) wheat genotypes grown under elevated CO2 (700µLL-1) combined with temperatures 2°C, 4°C and 6°C above the current ambient temperature. Terminal drought was induced in all combinations at anthesis in a split-plot design to test whether the effect of elevated CO2 combined with high temperature ameliorates the negative effects of terminal drought on biomass accumulation and grain yield. Biomass and grain yield were enhanced under elevated CO2 with 2°C above the ambient temperature, regardless of the watering regimen. The combinations of elevated CO2 plus 4°C or 6°C above the ambient temperature did not enhance biomass and grain yield, but tended to decrease them. The reductions in biomass and grain yield (45-50%) caused by terminal drought were less severe (21-28%) under elevated CO2 with 2°C above the ambient temperature. The amelioration resulted from a 63% increase in the rate of leaf net photosynthesis in 38-19 and a 39% increase in tillering and leaf area in Janz. The contrasting responses and phenological development of these two genotypes to the combination of elevated CO2, temperature and terminal drought, and the possible influences on their source-sink relationships are discussed.

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Crossref · 10.1071/fp12206

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  • Wheat yield decreased from 1% to 30% during mild drought stress at post-anthesis, while this reduction increased up to 92% in prolonged mild drought stress at flowering and grain formation.

    “Wheat yield was decreased from 1% to 30% during the mild drought stress at post-anthesis while this reduction increased up to 92% in case of prolonged mild drought stress at flowering and grain formation [49,50].”

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Authors
Dias de Oliveira, E., Bramley, H., Siddique, K. H. M., Henty, S., Berger, J., & Palta, J. A.
Affiliations
  • ACSIRO Plant Industry, Private Bag No 5, Wembley, WA 6913, Australia.
  • The University of Western Australia (AU)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
Corresponding author
Palta, Jairo A.
Venue
Functional Plant Biology
Published
2012-11-23
Volume
40
Issue
2
Pages
160-171
ISSN
  • 1445-4408 (ISSN-L)
  • 1445-4416
OpenAlex
W2038956888
Cited by
114
References
61
Citations by year
2026: 3 · 2025: 8 · 2024: 7 · 2023: 10 · 2022: 10 · 2021: 13 · 2020: 9 · 2019: 9 · 2018: 6 · 2017: 7 · 2016: 8 · 2015: 8 · 2014: 10 · 2013: 6
FWCI
8.76
Type
journal article
Language
en
Open access
closed
Locations
  • Functional Plant Biology (publishedVersion)
  • PubMed (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant responses to elevated CO2
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Climate change impacts on agriculture
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
Keywords
elevated CO2, high temperature, terminal drought, wheat, grain yield, biomass accumulation, leaf net photosynthesis, tillering, leaf area, genotype differences, source-sink relationships

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