Abstract
A new split-root system was established through grafting to study cotton response to non-uniform salinity. Each root half was treated with either uniform (100/100 mM) or non-uniform NaCl concentrations (0/200 and 50/150 mM). In contrast to uniform control, non-uniform salinity treatment improved plant growth and water use, with more water absorbed from the non- and low salinity side. Non-uniform treatments decreased Na(+) concentrations in leaves. The [Na(+)] in the '0' side roots of the 0/200 treatment was significantly higher than that in either side of the 0/0 control, but greatly decreased when the '0' side phloem was girdled, suggesting that the increased [Na(+)] in the '0' side roots was possibly due to transportation of foliar Na(+) to roots through phloem. Plants under non-uniform salinity extruded more Na(+) from the root than those under uniform salinity. Root Na(+) efflux in the low salinity side was greatly enhanced by the higher salinity side. NaCl-induced Na(+) efflux and H(+) influx were inhibited by amiloride and sodium orthovanadate, suggesting that root Na(+) extrusion was probably due to active Na(+)/H(+) antiport across the plasma membrane. Improved plant growth under non-uniform salinity was thus attributed to increased water use, reduced leaf Na(+) concentration, transport of excessive foliar Na(+) to the low salinity side, and enhanced Na(+) efflux from the low salinity root.
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Claims 11
Claim · model-written summary
Non-uniform salinity improved cotton growth relative to uniform salinity.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- non-uniform salinity treatmente0
- Outcome
- plant growthe0
- Direction
- improvede0
- Comparator
- uniform controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“In contrast to uniform control, non-uniform salinity treatment improved plant growth and water use”
Claim · model-written summary
Non-uniform salinity improved cotton water use relative to uniform salinity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- non-uniform salinity treatmente0
- Outcome
- water usee0
- Direction
- improvede0
- Comparator
- uniform controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“In contrast to uniform control, non-uniform salinity treatment improved plant growth and water use”
Claim · model-written summary
More water was absorbed from the non- and low-salinity side.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- non- and low salinity sidee0
- Outcome
- water absorbede0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“with more water absorbed from the non- and low salinity side”
Claim · model-written summary
Non-uniform salinity decreased cotton leaf Na(+) concentrations.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Non-uniform treatmentse0
- Outcome
- Na(+) concentrations in leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Non-uniform treatments decreased Na(+) concentrations in leaves”
Claim · model-written summary
Na(+) concentration in the zero-salinity roots under 0/200 treatment exceeded either side of the 0/0 control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 0/200 treatmente0
- Outcome
- [Na(+)] in the '0' side rootse0
- Direction
- highere0
- Comparator
- 0/0 controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“The [Na(+)] in the '0' side roots of the 0/200 treatment was significantly higher than that in either side of the 0/0 control”
Claim · model-written summary
Girdling the zero-salinity side phloem greatly decreased root Na(+) concentration.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- the '0' side phloem was girdlede0
- Direction
- decreasede0
Not reportedComparatorOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“but greatly decreased when the '0' side phloem was girdled”
Claim · model-written summary
Non-uniform salinity increased root Na(+) extrusion compared with uniform salinity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- non-uniform salinitye0
- Outcome
- Na(+) from the roote0
- Direction
- moree0
- Comparator
- uniform salinitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Plants under non-uniform salinity extruded more Na(+) from the root than those under uniform salinity”
Claim · model-written summary
The higher-salinity side greatly enhanced root Na(+) efflux on the low-salinity side.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- higher salinity sidee0
- Outcome
- Root Na(+) efflux in the low salinity sidee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Root Na(+) efflux in the low salinity side was greatly enhanced by the higher salinity side”
Claim · model-written summary
Amiloride inhibited NaCl-induced root Na(+) efflux and H(+) influx.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- amiloridee0
- Outcome
- NaCl-induced Na(+) efflux and H(+) influxe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“NaCl-induced Na(+) efflux and H(+) influx were inhibited by amiloride and sodium orthovanadate”
Claim · model-written summary
Sodium orthovanadate inhibited NaCl-induced root Na(+) efflux and H(+) influx.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- sodium orthovanadatee0
- Outcome
- NaCl-induced Na(+) efflux and H(+) influxe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“NaCl-induced Na(+) efflux and H(+) influx were inhibited by amiloride and sodium orthovanadate”
Claim · model-written summary
The authors attributed improved cotton growth under non-uniform salinity to increased water use, reduced leaf Na(+), foliar Na(+) transport, and root Na(+) efflux.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- non-uniform salinitye0
- Outcome
- Improved plant growthe0
- Qualifier
- increased water use, reduced leaf Na(+) concentration, transport of excessive foliar Na(+) to the low salinity side, and enhanced Na(+) efflux from the low salinity roote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Improved plant growth under non-uniform salinity was thus attributed to increased water use, reduced leaf Na(+) concentration, transport of excessive foliar Na(+) to the low salinity side, and enhanced Na(+) efflux from the low salinity root”
The same questions in other papers
salinity · physiology: water · Gossypium hirsutum (cotton)Positive and negative results
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- positive
- positive
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See all 17 papers →salinity · growth · Gossypium hirsutum (cotton)Positive and negative results
15 papers in the same direction as this paper · 91 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
104 papers more in this group
See all 108 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.