Crop wild relatives as a genetic resource for generating low-cyanide, drought-tolerant Sorghum
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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, 01.2020, p. 1-14.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Crop wild relatives as a genetic resource for generating low-cyanide, drought-tolerant Sorghum
AU - Cowan, Max F.
AU - Blomstedt, Cecilia K.
AU - Norton, Sally L.
AU - Henry, Robert J.
AU - Møller, Birger Lindberg
AU - Gleadow, Roslyn
PY - 2020/1
Y1 - 2020/1
N2 - 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.
AB - 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.
KW - Crop improvement
KW - Cyanogenesis
KW - Drought
KW - Nitrogen metabolism
KW - Performance
KW - Sorghum crop wild relatives
U2 - 10.1016/j.envexpbot.2019.103884
DO - 10.1016/j.envexpbot.2019.103884
M3 - Journal article
AN - SCOPUS:85072798634
VL - 169
SP - 1
EP - 14
JO - Environmental and Experimental Botany
JF - Environmental and Experimental Botany
SN - 0098-8472
M1 - 103884
ER -
ID: 234212452