Abstract
The addition of supplemental light (SL) is an effective way to offset insufficient lighting. Although it is commonly believed that SL increases leaf photosynthesis and therefore improves yield and fruit flavor, the mechanism underlying the effects of SL on the photosystem II (PSII) apparatus remains unclear, and SL leads to high energy consumption. In order to save energy, we investigated the physiological status of the PSII apparatus, plant growth parameters and fruit parameters under two types of overhead SL with a low daily energy consumption of 0.0918 kWh m-2. The results showed that SL significantly increased the leaf chlorophyll content from full unfolding to yellowing. However, a remarkable increase in the absorption flux per cross-section (ABS/CS), the quantum yield of electron transport (φEo) and the performance index (PIabs) was observed only in a relatively short period of the leaf life cycle. SL also enhanced the fruit yield and quality. The obviously increased ΔVK and ΔVJ components of the chlorophyll fluorescence induction kinetic (OJIP) curve, along with the significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups, resulted in more rapid leaf aging and earlier fruit ripening compared with the control plants (CK). Therefore, an energy-friendly SL strategy can alter the physiological status of the PSII apparatus, affecting yield and fruit quality and maturity.
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Claims 7
Claim · model-written summary
Supplemental light significantly increased tomato leaf chlorophyll content from full unfolding to yellowing.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- SLe1
- Outcome
- leaf chlorophyll contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e1“SL significantly increased the leaf chlorophyll content from full unfolding to yellowing”
Claim · model-written summary
Supplemental light increased the absorption flux per cross-section, the quantum yield of electron transport and the performance index, but only in a relatively short period of the leaf life cycle.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SLe1
- Outcome
- absorption flux per cross-section (ABS/CS), the quantum yield of electron transport (φEo) and the performance index (PIabs)e2
- Direction
- increasee2
- Qualifier
- only in a relatively short period of the leaf life cyclee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e1“SL significantly increased the leaf chlorophyll content from full unfolding to yellowing”
e2“a remarkable increase in the absorption flux per cross-section (ABS/CS), the quantum yield of electron transport (φEo) and the performance index (PIabs) was observed only in a relatively short period of the leaf life cycle”
Claim · model-written summary
Supplemental light enhanced tomato fruit yield and quality.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SLe1
- Outcome
- fruit yield and qualitye1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e1“SL also enhanced the fruit yield and quality”
Claim · model-written summary
In supplemental-light-treated tomato plants the ΔVK and ΔVJ components of the OJIP curve were obviously increased.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SL-treated groupse2
- Outcome
- ΔVK and ΔVJ components of the chlorophyll fluorescence induction kinetic (OJIP) curvee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e1“The obviously increased ΔVK and ΔVJ components of the chlorophyll fluorescence induction kinetic (OJIP) curve”
e2“significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups”
Claim · model-written summary
PIabs was significantly decreased from days 40-60 after unfolding in the SL-treated groups.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SL-treated groupse2
- Outcome
- PIabse2
- Direction
- decreasede2
- Qualifier
- from days 40-60 after unfoldinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e1“The obviously increased ΔVK and ΔVJ components of the chlorophyll fluorescence induction kinetic (OJIP) curve”
e2“significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups”
Claim · model-written summary
Supplemental light resulted in more rapid leaf aging in tomato than in control plants.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SL-treated groupse2
- Outcome
- leaf aginge3
- Direction
- more rapide3
- Comparator
- control plants (CK)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e2“significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups”
e3“resulted in more rapid leaf aging and earlier fruit ripening compared with the control plants (CK)”
Claim · model-written summary
Supplemental light resulted in earlier fruit ripening in tomato than in control plants.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- SL-treated groupse2
- Outcome
- fruit ripeninge3
- Direction
- earliere3
- Comparator
- control plants (CK)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e2“significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups”
e3“resulted in more rapid leaf aging and earlier fruit ripening compared with the control plants (CK)”
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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.