Abstract
Abstract To examine plant physiological responses to salinity, waterlogging, and subsequent drainage, summer squash (Cucurbita pepo) was grown in well watered or flooded sand with full‐strength Hoagland solution containing 100 mol/m3 sodium chloride (NaCl) or no NaCl for 14 d. Half of the waterlogged plants were transferred to drained conditions for 7 d of recovery, while half of salinized plants were continuously salinized until 21 d. Waterlogging or salinity alone reduced photosynthetic rate (Pn), stomatal conductance (gs), and leaf chlorophyll content to a greater extent with waterlogging. Waterlogging alone, however, did not affect leaf water potential (ψ leaf) Salinity alone did not affect leaf and root nitrogen content. A combination of waterlogging and salinity exacerbated the adverse effects of each factor alone for Pn, gs, leaf chlorophyll, and nitrogen content, but not for ψ leaf. Seven days after termination of waterlogging, a full recovery occurred for gs, ψ leaf, leaf chlorophyll content, and leaf and root nitrogen content for waterlogged plants under non‐saline conditions, while for waterlogged plants under saline conditions those parameters did not achieve that of the control value.
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Claims 9
Claim · model-written summary
Waterlogging alone reduced photosynthetic rate, stomatal conductance and leaf chlorophyll content to a greater extent than salinity alone.
Verbatim
e1“summer squash (Cucurbita pepo)”
e2“Waterlogging or salinity alone reduced photosynthetic rate (Pn), stomatal conductance (gs), and leaf chlorophyll content to a greater extent with waterlogging”
Claim · model-written summary
Waterlogging alone did not affect leaf water potential in squash grown in flooded sand compared with well watered plants.
Verbatim
e1“summer squash (Cucurbita pepo)”
e3“Waterlogging alone, however, did not affect leaf water potential (ψ leaf)”
e4“grown in well watered or flooded sand”
Claim · model-written summary
Salinity alone did not affect leaf and root nitrogen content of squash compared with no NaCl.
Verbatim
e1“summer squash (Cucurbita pepo)”
e5“Salinity alone did not affect leaf and root nitrogen content”
e6“or no NaCl for 14 d”
Claim · model-written summary
Combined waterlogging and salinity exacerbated the adverse effects of each factor alone on photosynthetic rate, stomatal conductance and leaf chlorophyll.
Verbatim
e1“summer squash (Cucurbita pepo)”
e7“A combination of waterlogging and salinity exacerbated the adverse effects of each factor alone for Pn, gs, leaf chlorophyll, and nitrogen content”
Claim · model-written summary
Combined waterlogging and salinity exacerbated the adverse effect of each factor alone on nitrogen content of squash.
Verbatim
e1“summer squash (Cucurbita pepo)”
e7“A combination of waterlogging and salinity exacerbated the adverse effects of each factor alone for Pn, gs, leaf chlorophyll, and nitrogen content”
Claim · model-written summary
Combined waterlogging and salinity did not exacerbate the effect on leaf water potential.
Verbatim
e1“summer squash (Cucurbita pepo)”
e7“A combination of waterlogging and salinity exacerbated the adverse effects of each factor alone for Pn, gs, leaf chlorophyll, and nitrogen content”
e3“but not for ψ leaf”
Claim · model-written summary
Seven days after waterlogging ended, gas exchange and leaf water potential and chlorophyll of non-saline waterlogged squash fully recovered.
Verbatim
e1“summer squash (Cucurbita pepo)”
e2“a full recovery occurred for gs, ψ leaf, leaf chlorophyll content, and leaf and root nitrogen content”
e3“Seven days after termination of waterlogging”
Claim · model-written summary
Seven days after waterlogging ended, leaf and root nitrogen content of non-saline waterlogged squash fully recovered.
Verbatim
e1“summer squash (Cucurbita pepo)”
e2“a full recovery occurred for gs, ψ leaf, leaf chlorophyll content, and leaf and root nitrogen content”
e3“Seven days after termination of waterlogging”
Claim · model-written summary
Waterlogged squash under saline conditions did not reach the control values for the recovery parameters after drainage.
Verbatim
e1“summer squash (Cucurbita pepo)”
e2“a full recovery occurred for gs, ψ leaf, leaf chlorophyll content, and leaf and root nitrogen content”
e3“for waterlogged plants under saline conditions those parameters did not achieve that of the control value”
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See all 5 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.