Abstract
Drought is one of the major abiotic stresses that limit soybean production worldwide. This study was conducted to determine whether soybean cultivars with divergent growth habits respond differently to drought stress at the vegetative growth stage regarding canopy reflectance, physiological, and gas exchange traits under controlled conditions. Soil moisture content was positively correlated with mid-day leaf water potential. Pooled over cultivar, photosynthesis and stomatal conductance were highly correlated with mid-day leaf water potential, while Ci/Ca exhibited a weak positive correlation. These data indicate that, regardless of cultivar, the decrease in net photosynthesis is mainly due to stomatal closure. For both cultivars, drought stress increased soybean canopy reflectance in the visible range of the spectrum but decreased reflectance in the near-infrared region. The quantified physiological traits would be useful to understand plant water relations and canopy structure to help soybean growers to make field management decisions during the growing season.
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Claims 7
Claim · model-written summary
Soil moisture content was positively correlated with midday leaf water potential.
- Treatment
- Soil moisture contente0
- Outcome
- mid-day leaf water potentiale0
- Direction
- positively correlatede0
Not reportedTaxon
Verbatim
e0“Soil moisture content was positively correlated with mid-day leaf water potential.”
Claim · model-written summary
Photosynthesis was highly correlated with midday leaf water potential across cultivars.
Not reportedTaxon
Verbatim
e0“Pooled over cultivar, photosynthesis and stomatal conductance were highly correlated with mid-day leaf water potential”
Claim · model-written summary
Stomatal conductance was highly correlated with midday leaf water potential across cultivars.
Not reportedTaxon
Verbatim
e0“Pooled over cultivar, photosynthesis and stomatal conductance were highly correlated with mid-day leaf water potential”
Claim · model-written summary
Ci/Ca had a weak positive correlation with midday leaf water potential.
Not reportedTaxonTreatment
Verbatim
e0“Ci/Ca exhibited a weak positive correlation.”
Claim · model-written summary
Authors infer that lower net photosynthesis is mainly due to stomatal closure regardless of cultivar.
Not reportedTaxon
Verbatim
e0“regardless of cultivar, the decrease in net photosynthesis is mainly due to stomatal closure”
Claim · model-written summary
Drought increased soybean canopy reflectance in the visible spectrum for both cultivars.
- Taxon
- soybean
Glycine maxe0 - Treatment
- drought stresse0
- Outcome
- canopy reflectance in the visible range of the spectrume0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both cultivars, drought stress increased soybean canopy reflectance in the visible range of the spectrum but decreased reflectance in the near-infrared region”
Claim · model-written summary
Drought decreased soybean canopy reflectance in the near-infrared region for both cultivars.
- Taxon
- soybeanGlycine maxe0
- Treatment
- drought stresse0
- Outcome
- reflectance in the near-infrared regione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both cultivars, drought stress increased soybean canopy reflectance in the visible range of the spectrum but decreased reflectance in the near-infrared region”
The same questions in other papers
drought · growth · Glycine max (soybean)Positive and negative results
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- negative
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See all 211 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.