Abstract
Soybean [ Glycine max (L.) Merr.] producers in the southeastern USA are often confronted with the problems of drought and toxic levels of subsoil Al. Our objective in this study was to determine the reaction of diverse soybean genotypes to combined effects of these two stress factors. Greenhouse studies were initiated to examine the problem. Two levels of Al saturation in a subsoil layer (6 and 71%), two levels of soil moisture (watered vs. unwatered),three genotypes (‘Forrest’, breeding line N77‐114, and PI 416937), and three sampling dates were used as treatments. Data were collected during a 14‐d drying cycle imposed at early to midpodfilling. Control pots were watered daily. Traits measured were relative water content, water potential, transpiration, diffusive resistance, leaf weight, and stem weight. In the combined presence of drought and Al stress, the Plant Introduction (PI) maintained a substantially higher relative water content, water potential, transpiration, and leaf weight than Forrest or N77‐114. Under drought stress alone, the water status of the PI was inferior to that of Forrest and N77‐114. These data suggest that Al tolerance can impart drought tolerance when subsoil Al is present. In regions where subsoil Al toxicity and drought are common, breeders should consider Al screening of germplasm to efficiently characterize and develop drought tolerant cultivars.
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Claims 5
Claim · model-written summary
PI 416937 maintained higher relative water content, water potential and transpiration than Forrest or N77‐114 under combined stress.
- Taxon
- Soybean
Glycine maxt0 - Material
- Plant Introduction (PI)e0
- Treatment
- combined presence of drought and Al stresse0
- Outcome
- relative water content, water potential, transpiratione0
- Direction
- highere0
- Comparator
- Forrest or N77‐114e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the combined presence of drought and Al stress, the Plant Introduction (PI) maintained a substantially higher relative water content, water potential, transpiration, and leaf weight than Forrest or N77‐114”
t0“Soybean”
Claim · model-written summary
PI 416937 maintained higher leaf weight under combined drought and aluminum stress.
- Taxon
- SoybeanGlycine maxt0
- Material
- Plant Introduction (PI)e0
- Treatment
- combined presence of drought and Al stresse0
- Outcome
- leaf weighte0
- Direction
- highere0
- Comparator
- Forrest or N77‐114e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the combined presence of drought and Al stress, the Plant Introduction (PI) maintained a substantially higher relative water content, water potential, transpiration, and leaf weight than Forrest or N77‐114”
t0“Soybean”
Claim · model-written summary
Under drought alone, PI 416937 had poorer water status than Forrest and N77‐114.
- Taxon
- SoybeanGlycine maxt0
- Material
- PIe0
- Treatment
- drought stress alonee0
- Outcome
- water statuse0
- Direction
- inferiore0
- Comparator
- Forrest and N77‐114e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought stress alone, the water status of the PI was inferior to that of Forrest and N77‐114”
t0“Soybean”
Claim · model-written summary
The authors infer that aluminum tolerance can confer drought tolerance when subsoil aluminum is present.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- drought tolerancee0
- Qualifier
- when subsoil Al is presente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al tolerance can impart drought tolerance when subsoil Al is present”
t0“Soybean”
Claim · model-written summary
The authors recommend screening germplasm for aluminum tolerance in regions with both stresses.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- Al screening of germplasme0
- Qualifier
- regions where subsoil Al toxicity and drought are commone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In regions where subsoil Al toxicity and drought are common, breeders should consider Al screening of germplasm to efficiently characterize and develop drought tolerant cultivars”
t0“Soybean”
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