Abstract
Abstract Green light and UV-A/B radiation are known to influence plant growth, photosynthesis, and antioxidant capacity; however, their combined effects on grafted watermelon seedlings remain unknown. In this study, the supplemental treatment effects from the multispectral lamp (featuring green light + UV-A/B) and the conventional seedling lamp were evaluated. Their light intensities were modulated by adjusting the lamp-seedling distance (LSD) to 60, 80, or 100 cm. The results demonstrated that multispectral supplemental lighting at 80 cm LSD (delivering 1.185 μmol m–2 s–1 photosynthetically active radiation, 0.154 μmol m–2 s–1 green light, 0.7 μW cm–2 UV-A, and 0.2 μW cm–2 UV-B) significantly enhanced scion and rootstock growth while suppressing tendril development. Notably, the disease index decreased by 26.3% under the multispectral lamp at this LSD when compared with the controls, and its net photosynthetic rate was increased by 18.7%. At day 7, the seedling vigor index even exceeded that of the control by 118.87%. The total chlorophyll content and the enzyme activities of superoxide dismutase and catalase were also elevated. Thus, multispectral supplemental lighting at 80 cm LSD enhances seedling vigor and stress tolerance.
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Claims 7
Claim · model-written summary
Multispectral light at 80 cm enhanced scion and rootstock growth.
- Taxon
- Watermelon
Citrullus lanatust0 - Treatment
- multispectral supplemental lighting at 80 cm LSDe0
- Outcome
- scion and rootstock growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“multispectral supplemental lighting at 80 cm LSD (delivering 1.185 μmol m–2 s–1 photosynthetically active radiation, 0.154 μmol m–2 s–1 green light, 0.7 μW cm–2 UV-A, and 0.2 μW cm–2 UV-B) significantly enhanced scion and rootstock growth”
t0“Watermelon”
Claim · model-written summary
Multispectral light suppressed tendril development.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- UV-A/B and Green Light Exposuret0
- Outcome
- tendril developmente0
- Direction
- suppressinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while suppressing tendril development”
t0“Effects of Combined UV-A/B and Green Light Exposure on Growth Performance, Photosynthesis, and Antioxidant Defense in Grafted Watermelon Seedlings”
Claim · model-written summary
Disease index fell 26.3% relative to controls at 80 cm.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- multispectral lampe0
- Outcome
- disease indexe0
- Direction
- decreasede0
- Value
- 26.3%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the disease index decreased by 26.3% under the multispectral lamp at this LSD when compared with the controls”
t0“Watermelon”
Claim · model-written summary
Net photosynthetic rate increased by 18.7%.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- UV-A/B and Green Light Exposuret0
- Outcome
- net photosynthetic ratee0
- Direction
- increasede0
- Value
- 18.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its net photosynthetic rate was increased by 18.7%”
t0“Effects of Combined UV-A/B and Green Light Exposure on Growth Performance, Photosynthesis, and Antioxidant Defense in Grafted Watermelon Seedlings”
Claim · model-written summary
At day 7, seedling vigor index exceeded control by 118.87%.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- UV-A/B and Green Light Exposuret0
- Outcome
- seedling vigor indexe0
- Direction
- exceedede0
- Value
- 118.87%e0
- Qualifier
- At day 7e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At day 7, the seedling vigor index even exceeded that of the control by 118.87%”
t0“Effects of Combined UV-A/B and Green Light Exposure on Growth Performance, Photosynthesis, and Antioxidant Defense in Grafted Watermelon Seedlings”
Claim · model-written summary
Total chlorophyll content increased.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- UV-A/B and Green Light Exposuret0
- Outcome
- total chlorophyll contente0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total chlorophyll content and the enzyme activities of superoxide dismutase and catalase were also elevated”
t0“Effects of Combined UV-A/B and Green Light Exposure on Growth Performance, Photosynthesis, and Antioxidant Defense in Grafted Watermelon Seedlings”
Claim · model-written summary
Superoxide dismutase and catalase activities increased.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- UV-A/B and Green Light Exposuret0
- Outcome
- enzyme activities of superoxide dismutase and catalasee0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total chlorophyll content and the enzyme activities of superoxide dismutase and catalase were also elevated”
t0“Effects of Combined UV-A/B and Green Light Exposure on Growth Performance, Photosynthesis, and Antioxidant Defense in Grafted Watermelon Seedlings”
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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.