Abstract
A real-time photosynthesis and transpiration monitoring system was developed and applied to monitor the time course of photosynthesis and transpiration of fully-grown tomato plant in a semi-commercial greenhouse. The system is composed of an open-bottom chamber and a sensing unit. The chamber encloses a two-meter high tomato plant with transparent film. The two fans equipped at the top of the chamber exhaust interior air and the open bottom allows exterior air to move into the chamber. The inflow- and outflow-air were continuously sampled, and their CO2 and H2O concentrations were measured. The developed system successfully traced the time courses of net photosynthetic and transpiration rates on typical sunny and rainy days. A decrease in net photosynthetic rate, which might be due to the stomatal closure caused by drought stress, was observed on the sunny day. On the other hand, negative net photosynthetic rate and transient increase in net photosynthetic rate and transpiration rate caused by the supplemental lighting were observed on the rainy day. In addition, the dark respiration rate was recognized during nighttime. These results suggest that the developed system can be a useful tool to evaluate the dynamic changes in photosynthesis and transpiration of crops in greenhouse.
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Claims 6
Claim · model-written summary
The system successfully traced net photosynthetic and transpiration rate time courses on sunny and rainy days.
- Taxon
- tomato plant
Solanum lycopersicumt0 - Outcome
- net photosynthetic and transpiration ratese0
- Qualifier
- typical sunny and rainy dayse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The developed system successfully traced the time courses of net photosynthetic and transpiration rates on typical sunny and rainy days.”
t0“Tomato Plant”
e1“The developed system successfully traced the time courses of net photosynthetic and transpiration rates on typical sunny and rainy days.”
Claim · model-written summary
Net photosynthetic rate decreased on the sunny day.
- Taxon
- tomato plantSolanum lycopersicumt0
- Outcome
- net photosynthetic ratee0
- Direction
- decreasee0
- Qualifier
- sunny daye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in net photosynthetic rate, which might be due to the stomatal closure caused by drought stress, was observed on the sunny day.”
t0“Tomato Plant”
e1“A decrease in net photosynthetic rate, which might be due to the stomatal closure caused by drought stress, was observed on the sunny day.”
Claim · model-written summary
Stomatal closure caused by drought stress might explain the sunny-day photosynthesis decline.
- Taxon
- tomato plantSolanum lycopersicumt0
- Outcome
- stomatal closuree0
- Qualifier
- drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which might be due to the stomatal closure caused by drought stress”
t0“Tomato Plant”
e1“which might be due to the stomatal closure caused by drought stress”
Claim · model-written summary
Net photosynthetic rate was negative on the rainy day.
- Taxon
- tomato plantSolanum lycopersicumt0
- Outcome
- net photosynthetic ratee0
- Direction
- negativee0
- Qualifier
- rainy daye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative net photosynthetic rate and transient increase in net photosynthetic rate and transpiration rate caused by the supplemental lighting were observed on the rainy day.”
t0“Tomato Plant”
e1“negative net photosynthetic rate and transient increase in net photosynthetic rate and transpiration rate caused by the supplemental lighting were observed on the rainy day.”
Claim · model-written summary
Supplemental lighting caused a transient increase in net photosynthetic and transpiration rates on the rainy day.
- Taxon
- tomato plantSolanum lycopersicumt0
- Treatment
- supplemental lightinge0
- Outcome
- net photosynthetic rate and transpiration ratee0
- Direction
- increasee0
- Qualifier
- rainy daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transient increase in net photosynthetic rate and transpiration rate caused by the supplemental lighting were observed on the rainy day.”
t0“Tomato Plant”
e1“transient increase in net photosynthetic rate and transpiration rate caused by the supplemental lighting were observed on the rainy day.”
Claim · model-written summary
The system recognized dark respiration rate at night.
- Taxon
- tomato plantSolanum lycopersicumt0
- Outcome
- dark respiration ratee0
- Qualifier
- nighttimee0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dark respiration rate was recognized during nighttime.”
t0“Tomato Plant”
e1“the dark respiration rate was recognized during nighttime.”
The same questions in other papers
light · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
64 papers in the same direction as this paper · 43 in the opposite direction · 5 reporting no difference from an alternative
- positive
- positive
- negative
109 papers more in this group
See all 113 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.