Abstract
Water stress caused by drought affects the productivity of the sugarcane crop. A breeding alternative is the selection of drought-tolerant sugarcane cultivars. The objective of this study was the in vitro screening of cultivars tolerant to water stress using polyethylene glycol (PEG) as a stressing agent. Cultivars (cv) Mex 69-290, CP 72-2086, Mex 79-431 and MOTZMex 92-207 were subjected to different concentrations of PEG 6000 (0, 3, 6 and 9% w/v) using Murashige and Skoog semi-solid culture medium. At 30 days of culture, different developmental variables and dry matter (DM), total protein (TP), proline (Pr) and glycine-betaine (GB) contents were evaluated. The results showed reduced development in cv CP 72-2086, Mex 79-431 and MOTZMex 92-207 with increasing PEG concentration. The cv Mex 69-290 showed tolerance to osmotic stress of −0.45 MPa using 3% PEG. Overall, TP content decreased with increasing PEG concentration, while DM, Pr and GB contents rose with increasing PEG concentration in all evaluated cultivars. Our results suggest that cv Mex 69-290 has a slight tolerance to water stress and could be used for rainfed cultivation with low rainfall or reduced irrigation for better water use efficiency. In conclusion, the in vitro screening technique of cultivars tolerant to PEG-induced water stress is an alternative for early determination of drought stress in sugarcane.
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Claims 6
Claim · model-written summary
Sugarcane cultivars CP 72-2086, Mex 79-431 and MOTZMex 92-207 showed reduced development with increasing PEG concentration.
- Taxon
- Sugarcanet0
- Material
- CP 72-2086, Mex 79-431 and MOTZMex 92-207e1
- Treatment
- increasing PEG concentratione1
- Outcome
- developmente1
- Direction
- reducede1
Not reportedComparator
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e1“The results showed reduced development in cv CP 72-2086, Mex 79-431 and MOTZMex 92-207 with increasing PEG concentration”
Claim · model-written summary
Cultivar Mex 69-290 showed tolerance to osmotic stress of -0.45 MPa under 3% PEG.
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e2“The cv Mex 69-290 showed tolerance to osmotic stress of −0.45 MPa using 3% PEG”
Claim · model-written summary
Total protein content decreased with increasing PEG concentration in sugarcane cultivars.
Not reportedComparator
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e3“Overall, TP content decreased with increasing PEG concentration, while DM, Pr and GB contents rose with increasing PEG concentration in all evaluated cultivars”
Claim · model-written summary
Dry matter, proline and glycine-betaine contents rose with increasing PEG concentration in all evaluated sugarcane cultivars.
- Taxon
- Sugarcanet0
- Treatment
- increasing PEG concentratione3
- Outcome
- DM, Pr and GB contentse3
- Direction
- rosee3
- Qualifier
- in all evaluated cultivarse3
Not reportedComparator
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e3“Overall, TP content decreased with increasing PEG concentration, while DM, Pr and GB contents rose with increasing PEG concentration in all evaluated cultivars”
Claim · model-written summary
The authors suggest cultivar Mex 69-290 could be used for rainfed cultivation with low rainfall or reduced irrigation.
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e4“Our results suggest that cv Mex 69-290 has a slight tolerance to water stress and could be used for rainfed cultivation with low rainfall or reduced irrigation for better water use efficiency”
Claim · model-written summary
The authors conclude the in vitro PEG screening technique is an alternative for early determination of drought stress in sugarcane.
Verbatim
t0“Sugarcane Cultivars (Saccharum spp. Hybrids)”
e5“In conclusion, the in vitro screening technique of cultivars tolerant to PEG-induced water stress is an alternative for early determination of drought stress in sugarcane”
The same questions in other papers
poly(ethylene glycol) · growth · Saccharum officinarum (sugarcane)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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