Abstract
The adaptive responses of soybean and cotton to various irrigation levels were explored in terms of transpiration, stomatal role in transpiration, leaf temperature (Tl) and CO2 assimilation rate (An). Compared with cotton, soybean showed a lower flow rate of stem sap (FRSS), transpiration rate (E), stomatal conductance (gs), stomatal density and An and had a smaller stomatal area but larger leaf area, heavier root dry matter and higher Tl at all irrigation levels. Under water stress conditions, FRSS, E, gs, and An decreased and Tl increased more in soybean than in cotton. Stomatal area decreased in response to water stress though nonsignificantly but stomatal density was not affected by water stress in soybean. Stomatal area decreased significantly in response to water stress in cotton. We concluded that soybean and cotton adapted to water stress differently. Soybean adapted to water stress by reducing transpiration while cotton adapted to water stress by maintaining higher transpiration as compared with soybean. Soybean reduced the transpiration rate by reducing gs. Reduction of gs in soybean was due to reduced FRSS, which might have resulted from the lower root moisture absorption efficiency. The higher transpiration in cotton was due to a higher gs, which was supported by a higher FRSS, larger stomatal area, and probably the diaheliotropism. The higher gs and transpiration rate suppressed the increase in Tl thus preventing the decrease of An in response to water stress.
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Claims 15
Claim · model-written summary
Soybean had lower stem sap flow, transpiration and stomatal conductance than cotton at all irrigation levels.
- Taxon
- soybean
Glycine maxe0 - Outcome
- flow rate of stem sap (FRSS), transpiration rate (E), stomatal conductance (gs)e0
- Direction
- lowere0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with cotton, soybean showed a lower flow rate of stem sap (FRSS), transpiration rate (E), stomatal conductance (gs)”
Claim · model-written summary
Soybean had lower stomatal density and assimilation than cotton.
- Taxon
- soybeanGlycine maxe0
- Outcome
- stomatal density and Ane0
- Direction
- lowere0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with cotton, soybean showed a lower flow rate of stem sap (FRSS), transpiration rate (E), stomatal conductance (gs), stomatal density and An”
t0“Soybean and Cotton”
Claim · model-written summary
Soybean had smaller stomatal area than cotton.
- Taxon
- soybeanGlycine maxt0
- Outcome
- stomatal areae0
- Direction
- smallere0
- Comparator
- cottont0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a smaller stomatal area but larger leaf area, heavier root dry matter and higher Tl at all irrigation levels”
t0“Soybean and Cotton”
Claim · model-written summary
Soybean had larger leaf area and heavier root dry matter than cotton.
- Taxon
- soybeanGlycine maxt0
- Outcome
- leaf area, heavier root dry mattere0
- Direction
- largere0
- Comparator
- cottont0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larger leaf area, heavier root dry matter and higher Tl at all irrigation levels”
t0“Soybean and Cotton”
Claim · model-written summary
Soybean had higher leaf temperature than cotton.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Tle0
- Direction
- highere0
- Comparator
- Cottont0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher Tl at all irrigation levels”
t0“Soybean and Cotton”
Claim · model-written summary
Water stress decreased stem sap flow, transpiration, conductance and assimilation more in soybean than cotton.
- Taxon
- soybeanGlycine maxe0
- Treatment
- water stress conditionse0
- Outcome
- FRSS, E, gs, and Ane0
- Direction
- decreasede0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, FRSS, E, gs, and An decreased and Tl increased more in soybean than in cotton”
Claim · model-written summary
Water stress increased leaf temperature more in soybean than cotton.
- Taxon
- soybeanGlycine maxe0
- Treatment
- water stress conditionse0
- Outcome
- Tle0
- Direction
- increasede0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under water stress conditions, FRSS, E, gs, and An decreased and Tl increased more in soybean than in cotton”
Claim · model-written summary
Soybean stomatal area decreased nonsignificantly under water stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- water stresse0
- Outcome
- Stomatal areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal area decreased in response to water stress though nonsignificantly but stomatal density was not affected by water stress in soybean”
Claim · model-written summary
Soybean stomatal density was not affected by water stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- water stresse0
- Outcome
- stomatal densitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stomatal density was not affected by water stress in soybean”
Claim · model-written summary
Cotton stomatal area decreased significantly under water stress.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- water stresse0
- Outcome
- Stomatal areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal area decreased significantly in response to water stress in cotton”
Claim · model-written summary
The authors attribute reduced soybean transpiration to reduced stomatal conductance.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- transpiration ratee0
- Qualifier
- reducing gse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean reduced the transpiration rate by reducing gs”
Claim · model-written summary
The authors suggest reduced soybean stem sap flow underlies lower conductance.
- Taxon
- soybeanGlycine maxe0
- Outcome
- gse0
- Qualifier
- reduced FRSSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of gs in soybean was due to reduced FRSS, which might have resulted from the lower root moisture absorption efficiency”
Claim · model-written summary
The authors suggest lower root moisture absorption efficiency might reduce soybean stem sap flow.
- Taxon
- soybeanGlycine maxt0
- Outcome
- FRSSe0
- Qualifier
- lower root moisture absorption efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced FRSS, which might have resulted from the lower root moisture absorption efficiency”
t0“Soybean and Cotton”
Claim · model-written summary
The authors attribute cotton’s higher transpiration to higher stomatal conductance.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- transpiratione0
- Qualifier
- higher gse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher transpiration in cotton was due to a higher gs, which was supported by a higher FRSS, larger stomatal area, and probably the diaheliotropism”
Claim · model-written summary
The authors infer higher conductance and transpiration suppressed leaf warming and thereby preserved assimilation under water stress.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- increase in Tle0
- Qualifier
- higher gs and transpiration ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher gs and transpiration rate suppressed the increase in Tl thus preventing the decrease of An in response to water stress”
t0“Soybean and Cotton”
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