Abstract
The main principle of poly house cultivation is the facilitation of favourable micro-climate, which favours maximum production. The UV-stabilized plastic sheet which covers the top of the poly house selectively screens the various spectral components of solar radiation and transforms direct sunlight into scattered light. Optimal photosynthesis of leaves involves the harmonious relationship between spectral management and the resultant PAR in poly house. Hence, basic information on the physiological aspects involved in the photoresponse of crop in poly house is needed to realize maximum yield potential. In this context, a study was undertaken to compare the photosynthetic productivity of gynoecious parthenocarpic cucumber which is widely grown in naturally ventilated poly house with that in open conditions. The study revealed that the low intercellular CO2 concentration and high stomatal resistance caused low carboxylation efficiency and photosynthetic rate at early stages of growth in poly house compared to open condition. But at later stages of growth, the carboxylation efficiency and photosynthetic rate was maintained even 60 DAS due to lower rate of stomatal limitations. This facilitates prolonged harvest and more number of harvests from poly house crop. The Fv/Fm ratio, which expresses the maximum photochemical efficiency of PS II, was lower under open condition compared to poly house.
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Claims 6
Claim · model-written summary
Early cucumber growth in the poly house had lower intercellular CO2 concentration and higher stomatal resistance than open conditions.
- Taxon
- cucumber
Cucumis sativuse1 - Organ / stage
- early stages of growthe0
- Treatment
- poly housee0
- Outcome
- intercellular CO2 concentratione0
- Direction
- lowe0
- Comparator
- open conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low intercellular CO2 concentration and high stomatal resistance caused low carboxylation efficiency and photosynthetic rate at early stages of growth in poly house compared to open condition.”
e1“cucumber”
Claim · model-written summary
Early cucumber growth in the poly house had higher stomatal resistance than open conditions.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- poly housee0
- Outcome
- stomatal resistancee0
- Direction
- highe0
- Comparator
- open conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high stomatal resistance caused low carboxylation efficiency and photosynthetic rate at early stages of growth in poly house compared to open condition.”
e1“cucumber”
Claim · model-written summary
Early cucumber growth in the poly house had lower carboxylation efficiency and photosynthetic rate than open conditions.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- poly housee0
- Outcome
- carboxylation efficiency and photosynthetic ratee0
- Direction
- lowe0
- Comparator
- open conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low carboxylation efficiency and photosynthetic rate at early stages of growth in poly house compared to open condition.”
e1“cucumber”
Claim · model-written summary
Cucumber carboxylation efficiency and photosynthetic rate were maintained through 60 days after sowing in the poly house.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- carboxylation efficiency and photosynthetic ratee0
- Direction
- maintainede0
- Value
- 60 DASe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at later stages of growth, the carboxylation efficiency and photosynthetic rate was maintained even 60 DAS due to lower rate of stomatal limitations.”
e1“cucumber”
Claim · model-written summary
Poly house cucumber had prolonged harvest and more harvests.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- poly housee0
- Outcome
- harvest and more number of harvestse0
- Direction
- prolongede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This facilitates prolonged harvest and more number of harvests from poly house crop.”
e1“cucumber”
Claim · model-written summary
The Fv/Fm ratio of cucumber was lower in open conditions than in the poly house.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- open conditione0
- Outcome
- Fv/Fm ratioe0
- Direction
- lowere0
- Comparator
- poly housee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fv/Fm ratio, which expresses the maximum photochemical efficiency of PS II, was lower under open condition compared to poly house.”
e1“cucumber”
The same questions in other papers
protected cultivation · physiology: photosynthesis · Cucumis sativus (cucumber)Results agree
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- positive
- positive
protected cultivation · yield · Cucumis sativus (cucumber)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.