Crop wild relatives as a genetic resource for generating low-cyanide, drought-tolerant Sorghum

Max F. Cowan, Cecilia K. Blomstedt, Sally L. Norton, Robert J. Henry, Birger Lindberg Møller, Roslyn Gleadow

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Using a Sorghum bicolor cultivar and seven wild Sorghum species endemic to Australia as our experimental system, we monitored their different responses to drought by assessing growth and morphological, physiological and biochemical parameters. Drought stress significantly decreased height, biomass, the maximum potential quantum efficiency of photosystem II, photosynthetic rate and relative water content in S. bicolor, while several of the wild species were much more tolerant. Drought significantly increased dhurrin concentration in aboveground tissue in S. bicolor but not in the wild species. Root dhurrin content was unaffected by drought in S. bicolor, in contrast to the varied responses observed in the wild species. Sorghum macrospermum and S. brachypodum maintained relatively high growth and photosynthetic performance under drought, with negligible aboveground dhurrin content. These wild species are promising candidates for sorghum crop improvement.

Original languageEnglish
Article number103884
Pages (from-to)1-14
Number of pages14
JournalEnvironmental and Experimental Botany
Volume169
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • Crop improvement
  • Cyanogenesis
  • Drought
  • Nitrogen metabolism
  • Performance
  • Sorghum crop wild relatives

Cite this

Cowan, Max F. ; Blomstedt, Cecilia K. ; Norton, Sally L. ; Henry, Robert J. ; Møller, Birger Lindberg ; Gleadow, Roslyn. / Crop wild relatives as a genetic resource for generating low-cyanide, drought-tolerant Sorghum. In: Environmental and Experimental Botany. 2020 ; Vol. 169. pp. 1-14.
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Crop wild relatives as a genetic resource for generating low-cyanide, drought-tolerant Sorghum. / Cowan, Max F.; Blomstedt, Cecilia K.; Norton, Sally L.; Henry, Robert J.; Møller, Birger Lindberg; Gleadow, Roslyn.

In: Environmental and Experimental Botany, Vol. 169, 103884, 01.01.2020, p. 1-14.

Research output: Contribution to journalArticleResearchpeer-review

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