Abstract
Supplemental lighting is frequently used to extend daylength for strawberries ( Fragaria × ananassa ) grown in greenhouses and high tunnels; however, information is limited on the effect of these lights on disease development. We evaluated the effect of ambient light and six supplemental light treatments [red, blue, and white light-emitting diodes (LEDs), separately; a combination of red, blue, and white LEDs; wide-spectrum fluorescent (WSF); and WFS + ultraviolet B (UV-B)] on plant growth and disease response of strawberries grown in a greenhouse. Plants were exposed to supplemental light treatments for 17 h each day. In the WSF+UV-B treatment, plants were exposed to WSF light during the day and to UV-B light for 3 hours during the night. Two trials were conducted; each trial contained five or six cultivars and was replicated three times. Twice during each trial, detached leaves from each cultivar in each light treatment were inoculated with a conidial suspension of the anthracnose crown rot pathogen, Colletotrichum gloeosporioides and rated for disease severity 10 days later. There was a significant difference due to light treatment and to cultivar in relative chlorophyll content and plant growth parameters. Plant injury ratings were lowest in the white LED, WSF, and WSF+UV-B treatments. Plants in the combination LED and red LED light treatments received higher injury, lower vigor scores, and lower relative chlorophyll content values than plants in all other light treatments. After inoculation of detached strawberry leaves with C. gloeosporioides in Trial 1, there was a significant effect due to light treatments on disease severity ratings (DSRs) after 18 weeks’ exposure to light treatments with the DSRs in the WSF+UV-B treatment being lower than those in all other treatments except those in the red LED treatment. There was not a significant effect in DSRs due to light treatments after 24 weeks in Trial 1 or after 4 or 22 weeks in Trial 2. There were significant effects due to cultivar on DSRs in both trials: ‘Strawberry Festival’, ‘Pelican’, and ‘Seascape’ received the lowest DSRs. This study showed an effect of supplemental light on several strawberry plant growth parameters, including a harmful effect of high-intensity red LED irradiation.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Light treatment and cultivar significantly affected relative chlorophyll content and plant growth parameters.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- light treatmente0
- Outcome
- relative chlorophyll content and plant growth parameterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“There was a significant difference due to light treatment and to cultivar in relative chlorophyll content and plant growth parameters.”
t0“Strawberry”
Claim · model-written summary
White LED, WSF, and WSF+UV-B had the lowest plant injury ratings.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- white LED, WSF, and WSF+UV-B treatmentse0
- Outcome
- Plant injury ratingse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant injury ratings were lowest in the white LED, WSF, and WSF+UV-B treatments.”
t0“Strawberry”
Claim · model-written summary
Combination LED and red LED treatments produced higher injury than other light treatments.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- combination LED and red LED light treatmentse0
- Outcome
- injurye0
- Direction
- highere0
- Comparator
- all other light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants in the combination LED and red LED light treatments received higher injury, lower vigor scores, and lower relative chlorophyll content values than plants in all other light treatments.”
t0“Strawberry”
Claim · model-written summary
Combination LED and red LED treatments produced lower vigor scores than other treatments.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- combination LED and red LED light treatmentse0
- Outcome
- vigor scorese0
- Direction
- lowere0
- Comparator
- all other light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants in the combination LED and red LED light treatments received higher injury, lower vigor scores, and lower relative chlorophyll content values than plants in all other light treatments.”
t0“Strawberry”
Claim · model-written summary
Combination LED and red LED treatments produced lower chlorophyll content than other treatments.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- combination LED and red LED light treatmentse0
- Outcome
- relative chlorophyll content valuese0
- Direction
- lowere0
- Comparator
- all other light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants in the combination LED and red LED light treatments received higher injury, lower vigor scores, and lower relative chlorophyll content values than plants in all other light treatments.”
t0“Strawberry”
Claim · model-written summary
After 18 weeks in Trial 1, WSF+UV-B lowered disease severity relative to all treatments except red LED.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- WSF+UV-B treatmente0
- Interactor
- C. gloeosporioides
Colletotrichum gloeosporioidese0pathogen - Outcome
- disease severity ratingse0
- Direction
- lowere0
- Qualifier
- after 18 weeks’ exposuree0
- Comparator
- all other treatments except those in the red LED treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After inoculation of detached strawberry leaves with C. gloeosporioides in Trial 1, there was a significant effect due to light treatments on disease severity ratings (DSRs) after 18 weeks’ exposure to light treatments with the DSRs in the WSF+UV-B treatment being lower than those in all other treatments except those in the red LED treatment.”
Claim · model-written summary
Light treatments had no significant effect on disease severity at 24 weeks in Trial 1 or 4 and 22 weeks in Trial 2.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- light treatmentse0
- Outcome
- DSRse0
- Qualifier
- after 24 weeks in Trial 1 or after 4 or 22 weeks in Trial 2e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was not a significant effect in DSRs due to light treatments after 24 weeks in Trial 1 or after 4 or 22 weeks in Trial 2.”
t0“Strawberry”
Claim · model-written summary
Cultivars differed significantly in disease severity in both trials; Strawberry Festival, Pelican, and Seascape had the lowest ratings.
- Taxon
- StrawberryFragaria ×ananassat0
- Material
- ‘Strawberry Festival’, ‘Pelican’, and ‘Seascape’e0
- Outcome
- DSRse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant effects due to cultivar on DSRs in both trials: ‘Strawberry Festival’, ‘Pelican’, and ‘Seascape’ received the lowest DSRs.”
t0“Strawberry”
The same questions in other papers
light · crop injury · Fragaria x ananassa (strawberry)Positive and negative results
1 in the opposite direction
- negative
uv · crop injury · Fragaria x ananassa (strawberry)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
light · physiology: pigments · Fragaria x ananassa (strawberry)Positive and negative results
3 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →light · growth · Fragaria x ananassa (strawberry)Positive and negative results
13 papers in the same direction as this paper · 54 in the opposite direction
- positive
- positive
- positive
64 papers more in this group
See all 68 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.