Abstract
Waterlogging induces growth and developmental changes in sensitive crops such as cucumber ( Cucumis sativus L.) during early plant development. However, information on the physiological mechanisms underpinning the response of cucumber plants to waterlogging conditions is limited. Here, we investigated the effects of 10-day waterlogging stress on the morphology, photosynthesis, and chlorophyll fluorescence parameters in two cultivars of cucumber seedlings. Waterlogging stress hampered cultivars’ growth, biomass accumulation, and photosynthetic capacity. Both cultivars also developed adventitious roots (ARs) after 10 days of waterlogging (DOW). We observed differential responses in the light- and carbon-dependent reactions of photosynthesis, with an increase in light-dependent reactions. At the same time, carbon assimilation was considerably inhibited by waterlogging. Specifically, the CO 2 assimilation rate ( A ) in leaves was significantly reduced and was caused by a corresponding decrease in stomatal conductance (g s ). The downregulation of the maximum rate of Rubisco efficiency (V cmax ) and the maximum rate of photosynthetic electron transport (J max ) were non-stomatal limiting factors contributing to A reduction. Exposure of cucumber to 10 DOW affected the PSII photochemistry by downregulating the PSII quantum yield (Φ PSII ). The redox state of the primary quinone acceptor in the lake model (1-qL), a measure of the regulatory balance of the light reactions, became more oxidized after 10 DOW, indicating enhanced electron sink capacity despite a reduced A . Overall, the results suggest that waterlogging induces alterations in the photochemical apparatus efficiency of cucumber. Thus, developing cultivars that resist inhibition of PSII photochemistry while maintaining carbon metabolism is a potential approach for increasing crops’ tolerance to waterlogged environments.
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Claims 11
Claim · model-written summary
Waterlogging hampered cucumber growth and biomass accumulation.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- Waterlogging stresse0
- Outcome
- growth, biomass accumulatione0
- Direction
- hamperede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging stress hampered cultivars’ growth, biomass accumulation, and photosynthetic capacity.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Waterlogging hampered photosynthetic capacity.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Waterlogging stresse0
- Outcome
- photosynthetic capacitye0
- Direction
- hamperede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging stress hampered cultivars’ growth, biomass accumulation, and photosynthetic capacity.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Both cucumber cultivars developed adventitious roots after ten days of waterlogging.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 10 days of waterlogginge0
- Outcome
- developed adventitious rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both cultivars also developed adventitious roots (ARs) after 10 days of waterlogging (DOW).”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Light dependent photosynthetic reactions increased under waterlogging.
- Taxon
- cucumberCucumis sativust0
- Treatment
- waterlogginge1
- Outcome
- light-dependent reactionse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We observed differential responses in the light- and carbon-dependent reactions of photosynthesis, with an increase in light-dependent reactions.”
t0“cucumber (Cucumis sativus L.)”
e1“by waterlogging.”
Claim · model-written summary
Waterlogging considerably inhibited carbon assimilation.
- Taxon
- cucumberCucumis sativust0
- Treatment
- waterlogginge0
- Outcome
- carbon assimilatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carbon assimilation was considerably inhibited by waterlogging.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Leaf CO2 assimilation rate significantly fell with waterlogging.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- leavese0
- Treatment
- waterlogginge1
- Outcome
- CO 2 assimilation ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the CO 2 assimilation rate ( A ) in leaves was significantly reduced”
e1“by waterlogging.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Decreased stomatal conductance caused reduced assimilation.
- Taxon
- cucumberCucumis sativust0
- Outcome
- CO 2 assimilation ratee1
- Qualifier
- decrease in stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was caused by a corresponding decrease in stomatal conductance (g s ).”
e1“CO 2 assimilation rate ( A ) in leaves was significantly reduced”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Downregulated Rubisco efficiency and electron transport were nonstomatal constraints on assimilation.
- Taxon
- cucumberCucumis sativust0
- Gene
- Rubiscoe0
- Outcome
- A reductione0
- Qualifier
- non-stomatal limiting factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The downregulation of the maximum rate of Rubisco efficiency (V cmax ) and the maximum rate of photosynthetic electron transport (J max ) were non-stomatal limiting factors contributing to A reduction.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Ten days of waterlogging downregulated PSII quantum yield.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- 10 DOWe0
- Outcome
- PSII quantum yielde0
- Direction
- downregulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure of cucumber to 10 DOW affected the PSII photochemistry by downregulating the PSII quantum yield (Φ PSII ).”
Claim · model-written summary
The primary quinone acceptor redox state became more oxidized after ten days of waterlogging.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 10 DOWe0
- Outcome
- redox state of the primary quinone acceptore0
- Direction
- more oxidizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The redox state of the primary quinone acceptor in the lake model (1-qL), a measure of the regulatory balance of the light reactions, became more oxidized after 10 DOW”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Authors propose cultivars resisting PSII inhibition while maintaining carbon metabolism to improve waterlogging tolerance.
- Taxon
- cucumberCucumis sativust0
- Outcome
- developing cultivars that resist inhibition of PSII photochemistry while maintaining carbon metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developing cultivars that resist inhibition of PSII photochemistry while maintaining carbon metabolism is a potential approach for increasing crops’ tolerance to waterlogged environments.”
t0“cucumber (Cucumis sativus L.)”
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See all 9 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.