Abstract
Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material. In the solar greenhouse, different days (1, 3, 5, 7, 9 d) of light (PAR < 200 µmol·m-2·s-1) and normal light conditions were designed with shading nets to observe the growth indexes of cucumber plants and the changes of antioxidant enzyme activities in leaves. The results showed that: (1) continuous low light increased the SPAD (relative chlorophyll) value of cucumber leaves and decreased the net photosynthetic rate. The longer the continuous low light days are, the smaller the net photosynthetic rate of cucumber leaves and the worse the photosynthetic recovery ability would be. (2) The plant height, stem diameter and leaf area per plant were lower than CK, and the above indexes could not return to the normal level after 9 days of normal light recovery; the yield and marketability of cucumber fruit decreased under continuous low illumination. (3) The activities of SOD (superoxide dismutase) and POD (peroxidase) in cucumber leaves increased, the activities of CAT (catalase) first increased and then decreased, and the content of MDA (malondialdehyde) continued to increase. The longer the days of continuous light keep, the more seriously the cucumber leaves were damaged by membrane lipid peroxidation. After continuous light for more than 7 days, the metabolic function of cucumber leaves was difficult to recover to the normal level.
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Claims 12
Claim · model-written summary
Continuous low light increased the SPAD value of cucumber leaves compared with normal light.
- Taxon
- Cucumber
Cucumis sativuse0 - Organ / stage
- leavese2
- Treatment
- continuous low lighte2
- Outcome
- SPAD (relative chlorophyll) valuee2
- Direction
- increasede2
- Comparator
- normal light conditionse1
- Setting
- solar greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e1“In the solar greenhouse, different days (1, 3, 5, 7, 9 d) of light (PAR < 200 µmol·m-2·s-1) and normal light conditions were designed with shading nets”
e2“continuous low light increased the SPAD (relative chlorophyll) value of cucumber leaves and decreased the net photosynthetic rate”
Claim · model-written summary
Continuous low light decreased the net photosynthetic rate of cucumber leaves compared with normal light.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous low lighte2
- Outcome
- net photosynthetic ratee2
- Direction
- decreasede2
- Comparator
- normal light conditionse1
- Setting
- solar greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e1“In the solar greenhouse, different days (1, 3, 5, 7, 9 d) of light (PAR < 200 µmol·m-2·s-1) and normal light conditions were designed with shading nets”
e2“continuous low light increased the SPAD (relative chlorophyll) value of cucumber leaves and decreased the net photosynthetic rate”
Claim · model-written summary
The longer the continuous low-light days, the smaller the net photosynthetic rate of cucumber leaves.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous low light dayse3
- Outcome
- net photosynthetic ratee3
- Direction
- smallere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e3“The longer the continuous low light days are, the smaller the net photosynthetic rate of cucumber leaves and the worse the photosynthetic recovery ability would be”
Claim · model-written summary
The longer the continuous low-light days, the worse the photosynthetic recovery ability of cucumber leaves.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous low light dayse3
- Outcome
- photosynthetic recovery abilitye3
- Direction
- worsee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e3“The longer the continuous low light days are, the smaller the net photosynthetic rate of cucumber leaves and the worse the photosynthetic recovery ability would be”
Claim · model-written summary
Continuous low light lowered plant height, stem diameter and leaf area per plant of cucumber compared with the control.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous low lighte2
- Outcome
- plant height, stem diameter and leaf area per plante4
- Direction
- lowere4
- Comparator
- CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e2“continuous low light increased the SPAD (relative chlorophyll) value of cucumber leaves and decreased the net photosynthetic rate”
e4“The plant height, stem diameter and leaf area per plant were lower than CK, and the above indexes could not return to the normal level after 9 days of normal light recovery”
Claim · model-written summary
Cucumber plant indexes could not return to normal level after 9 days of normal light recovery.
- Taxon
- CucumberCucumis sativuse0
- Outcome
- above indexese4
- Qualifier
- could not return to the normal level after 9 days of normal light recoverye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e4“The plant height, stem diameter and leaf area per plant were lower than CK, and the above indexes could not return to the normal level after 9 days of normal light recovery”
Claim · model-written summary
Continuous low illumination decreased the yield and marketability of cucumber fruit.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous low illuminatione5
- Outcome
- yield and marketability of cucumber fruite5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e5“the yield and marketability of cucumber fruit decreased under continuous low illumination”
Claim · model-written summary
Continuous light increased the activities of SOD and POD in cucumber leaves.
- Taxon
- CucumberCucumis sativuse0
- Organ / stage
- leavese6
- Treatment
- continuous lighte5
- Outcome
- activities of SOD (superoxide dismutase) and POD (peroxidase)e6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e5“The longer the days of continuous light keep, the more seriously the cucumber leaves were damaged by membrane lipid peroxidation”
e6“The activities of SOD (superoxide dismutase) and POD (peroxidase) in cucumber leaves increased, the activities of CAT (catalase) first increased and then decreased, and the content of MDA (malondialdehyde) continued to increase”
Claim · model-written summary
Catalase activity in cucumber leaves first increased and then decreased under continuous light.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous lighte5
- Outcome
- activities of CAT (catalase)e6
- Direction
- first increased and then decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e5“The longer the days of continuous light keep, the more seriously the cucumber leaves were damaged by membrane lipid peroxidation”
e6“The activities of SOD (superoxide dismutase) and POD (peroxidase) in cucumber leaves increased, the activities of CAT (catalase) first increased and then decreased, and the content of MDA (malondialdehyde) continued to increase”
Claim · model-written summary
Malondialdehyde content in cucumber leaves continued to increase under continuous light.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous lighte5
- Outcome
- content of MDA (malondialdehyde)e6
- Direction
- continued to increasee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e5“The longer the days of continuous light keep, the more seriously the cucumber leaves were damaged by membrane lipid peroxidation”
e6“The activities of SOD (superoxide dismutase) and POD (peroxidase) in cucumber leaves increased, the activities of CAT (catalase) first increased and then decreased, and the content of MDA (malondialdehyde) continued to increase”
Claim · model-written summary
The longer continuous light lasted, the more seriously cucumber leaves were damaged by membrane lipid peroxidation.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- continuous lighte5
- Outcome
- membrane lipid peroxidatione5
- Direction
- more seriouslye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e5“The longer the days of continuous light keep, the more seriously the cucumber leaves were damaged by membrane lipid peroxidation”
Claim · model-written summary
After more than 7 days of continuous light, the metabolic function of cucumber leaves was difficult to restore to normal.
- Taxon
- CucumberCucumis sativuse0
- Organ / stage
- leavese1
- Treatment
- continuous light for more than 7 dayse1
- Outcome
- metabolic functione1
- Qualifier
- was difficult to recover to the normal levele1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber Variety ‘Drite L108’ (Cucumis sativus L. Cv. Derit L108) was selected as the test material”
e1“After continuous light for more than 7 days, the metabolic function of cucumber leaves was difficult to recover to the normal level”
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