Abstract
Abstract Low temperature (LT) and high humidity (HH) are important environmental factors in greenhouses and plastic tunnels during the cold season, as they hamper plant growth and development. Here, we studied the effect of LT (day/night: 9/5 °C, 25/18 °C as control) and HH (95%, 80% as control) on young cucumber plants at the 2, 4 or 6 leaf stages. LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage. SOD, POD, CAT, APX and GR were upregulated under LT+HH stress as compared to the control at the 6 leaf stage. ABA and JA increased under LT+HH stress as compared to the control at the 6 leaf stage, while IAA and GA decreased under LT+HH stress as compared to the control at the 2 leaf stage. Our results show that LT+HH stress affects young cucumber plant photosynthetic efficiency, PSII activity, antioxidant defence system, ROS and hormone profile. Plants at the 6 leaf stage were more tolerant than at the 2 and 4 leaf stages under stress conditions.
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Claims 11
Claim · model-written summary
Combined low temperature and high humidity reduced cucumber fresh and dry shoot, root and total weights at the two-leaf stage.
- Taxon
- cucumber
Cucumis sativust0 - Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- shoot, root and total fresh and dry weightse0
- Direction
- declinee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Combined stress decreased P n, g s and T r at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- P n , g s , T re0
- Direction
- decreasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Combined stress decreased F v /F m, qP and ETR at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- F v /F m , qP, ETRe0
- Direction
- decreasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Combined stress decreased chlorophyll at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- chlorophylle0
- Direction
- decreasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Combined stress increased MDA, H 2 O 2 and O 2 ‐ at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- MDA, H 2 O 2 , O 2 ‐e0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Combined stress increased NPQ and C i at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- NPQ and C ie0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LT+HH stress resulted in a decline in shoot, root and total fresh and dry weights, and decreased P n , g s , T r , F v /F m , qP, ETR and chlorophyll, and increased MDA, H 2 O 2 , O 2 ‐ , NPQ and C i as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
SOD, POD and CAT were upregulated by combined stress at the six-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 6 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- SOD, POD, CATe0
- Direction
- upregulatede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SOD, POD, CAT, APX and GR were upregulated under LT+HH stress as compared to the control at the 6 leaf stage.”
t0“cucumber”
Claim · model-written summary
APX and GR were upregulated by combined stress at the six-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 6 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- APX and GRe0
- Direction
- upregulatede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SOD, POD, CAT, APX and GR were upregulated under LT+HH stress as compared to the control at the 6 leaf stage.”
t0“cucumber”
Claim · model-written summary
ABA and JA rose under combined stress at the six-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 6 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- ABA and JAe0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA and JA increased under LT+HH stress as compared to the control at the 6 leaf stage”
t0“cucumber”
Claim · model-written summary
IAA and GA fell under combined stress at the two-leaf stage.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 2 leaf stagee0
- Treatment
- LT+HH stresse0
- Outcome
- IAA and GAe0
- Direction
- decreasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA and GA decreased under LT+HH stress as compared to the control at the 2 leaf stage.”
t0“cucumber”
Claim · model-written summary
Six-leaf-stage cucumber plants were more stress tolerant than two- and four-leaf-stage plants.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- 6 leaf stagee0
- Outcome
- more tolerante0
- Direction
- more tolerante0
- Comparator
- the 2 and 4 leaf stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants at the 6 leaf stage were more tolerant than at the 2 and 4 leaf stages under stress conditions.”
t0“cucumber”
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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.