Abstract
Effects of end-of-day far-red (EOD-FR, 700-800 nm) light and high blue photon flux ratio during the photoperiod on intumescence injury were examined for 'Beaufort' and 'Maxifort' tomato rootstock seedlings (Solanum lycopersicum × Solanum habrochaites) grown with 13 mol m-2 d-1 daily light integral (199 µmol m-2 s-1 photosynthetic photon flux, 18 h photoperiod). The EOD-FR light treatment (1.1 mmol m-2 d-1 provided by 6.0 µmol m-2 s-1 FR photon flux for 3 min at EOD) significantly reduced intumescence injury. For example, by the EOD-FR light treatment, the incidences of leaf abscission were reduced from 88 to 8% for 'Beaufort' and from 79 to 25% for 'Maxifort'. However, EOD-FR light caused undesirable stem extension (41% greater than that without EOD-FR light). By combining relatively high B (blue, 400-500 nm) to R (red, 600-700 nm) photon flux ratio (50%B-50%R) during the photoperiod with EOD-FR light, intumescence injury was further decreased without causing undesirable stem extension. For example, the incidences of leaf abscission were reduced from 88 to 0% for 'Beaufort' and from 79 to 0% for 'Maxifort', compared to those under 10%B-90%R without EOD-FR light. Also, the percentages of leaves that exhibited intumescences were reduced from 68 to 30% for 'Beaufort' and from 55 to 19% for 'Maxifort'. Our study demonstrated that blue-rich light quality combined with a small dose of EOD-FR lighting could be applied to mitigate the problematic intumescence injury of tomato seedlings grown under LEDs.
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Claims 10
Claim · model-written summary
End-of-day far-red light significantly reduced intumescence injury.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- EOD-FR light treatmente0
- Outcome
- intumescence injurye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The EOD-FR light treatment (1.1 mmol m-2 d-1 provided by 6.0 µmol m-2 s-1 FR photon flux for 3 min at EOD) significantly reduced intumescence injury.”
t0“tomato rootstocks”
Claim · model-written summary
Far-red reduced Beaufort leaf abscission from 88 to 8%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Beaufort'e0
- Outcome
- leaf abscissione0
- Direction
- reducede0
- Value
- 8%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the incidences of leaf abscission were reduced from 88 to 8% for 'Beaufort'”
t0“tomato rootstocks”
Claim · model-written summary
Far-red reduced Maxifort leaf abscission from 79 to 25%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Maxifort'e0
- Treatment
- EOD-FR light treatmente1
- Outcome
- leaf abscissione1
- Direction
- reducede1
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 79 to 25% for 'Maxifort'”
e1“by the EOD-FR light treatment, the incidences of leaf abscission were reduced”
t0“tomato rootstocks”
Claim · model-written summary
Far-red increased stem extension by 41%.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- EOD-FR lighte0
- Outcome
- stem extensione0
- Direction
- greatere0
- Value
- 41%e0
- Comparator
- without EOD-FR lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EOD-FR light caused undesirable stem extension (41% greater than that without EOD-FR light)”
t0“tomato rootstocks”
Claim · model-written summary
Blue-rich light with far-red further decreased intumescence injury.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 50%B-50%Re0
- Outcome
- intumescence injurye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By combining relatively high B (blue, 400-500 nm) to R (red, 600-700 nm) photon flux ratio (50%B-50%R) during the photoperiod with EOD-FR light, intumescence injury was further decreased without causing undesirable stem extension.”
t0“tomato rootstocks”
Claim · model-written summary
The combination did not cause undesirable stem extension.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 50%B-50%Re1
- Outcome
- stem extensione0
- Direction
- without causinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intumescence injury was further decreased without causing undesirable stem extension”
e1“50%B-50%R) during the photoperiod with EOD-FR light”
t0“tomato rootstocks”
Claim · model-written summary
Combined light reduced Beaufort leaf abscission from 88 to 0%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Beaufort'e0
- Treatment
- 50%B-50%Re1
- Outcome
- leaf abscissione0
- Direction
- reducede0
- Value
- 0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf abscission were reduced from 88 to 0% for 'Beaufort'”
e1“50%B-50%R) during the photoperiod with EOD-FR light”
t0“tomato rootstocks”
Claim · model-written summary
Combined light reduced Maxifort leaf abscission from 79 to 0%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Maxifort'e0
- Treatment
- 50%B-50%Re2
- Outcome
- leaf abscissione1
- Direction
- reducede1
- Value
- 0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 79 to 0% for 'Maxifort'”
e1“the incidences of leaf abscission were reduced from 88 to 0%”
e2“50%B-50%R) during the photoperiod with EOD-FR light”
t0“tomato rootstocks”
Claim · model-written summary
Combined light reduced Beaufort leaves with intumescences from 68 to 30%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Beaufort'e0
- Treatment
- 50%B-50%Re1
- Outcome
- leaves that exhibited intumescencese0
- Direction
- reducede0
- Value
- 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentages of leaves that exhibited intumescences were reduced from 68 to 30% for 'Beaufort'”
e1“50%B-50%R) during the photoperiod with EOD-FR light”
t0“tomato rootstocks”
Claim · model-written summary
Combined light reduced Maxifort leaves with intumescences from 55 to 19%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 'Maxifort'e0
- Treatment
- 50%B-50%Re2
- Outcome
- leaves that exhibited intumescencese1
- Direction
- reducede1
- Value
- 19%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 55 to 19% for 'Maxifort'”
e1“percentages of leaves that exhibited intumescences were reduced”
e2“50%B-50%R) during the photoperiod with EOD-FR light”
t0“tomato rootstocks”
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