Abstract
Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse under three levels of biologically effective ultraviolet‐B (UV‐B BE ) radiation (effective daily dose: 0, 11.5 and 13.6 kJ m –2 ) for 91 days. Plants were harvested at regular intervals beginning 10 days after germination until reproductive maturity. Mathematical growth analysis revealed that the effects of UV‐B radiation varied with plant growth stage. The transition period between vegetative and reproductive growth was the most sensitive to UV‐B radiation. Intermediate levels of UV‐B had deleterious effects on plant height, leaf area, and total plant dry weight at late vegetative and reproductive stages of development. Specific leaf weight increased during vegetative growth but was unaffected by UV‐B during reproductive growth stages. Relative growth, net assimilation, and stem elongation rates were decreased by UV‐B radiation during vegetative and early reproductive growth stages. Variation in plant responses may be due in part to changes in microclimate within the plant canopy or to differences in repair or protection mechanisms at differing developmental stages.
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Claims 6
Claim · model-written summary
The transition period between vegetative and reproductive growth was the most sensitive stage to UV-B radiation
- Taxon
- Soybean
Glycine maxe1 - Organ / stage
- transition period between vegetative and reproductive growthe2
- Treatment
- UV‐B radiatione2
- Outcome
- most sensitivee2
- Setting
- unshaded greenhousee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e2“The transition period between vegetative and reproductive growth was the most sensitive to UV‐B radiation”
Claim · model-written summary
Intermediate UV-B levels had deleterious effects on plant height, leaf area and total plant dry weight at late vegetative and reproductive stages
- Taxon
- SoybeanGlycine maxe1
- Organ / stage
- late vegetative and reproductive stages of developmente3
- Treatment
- Intermediate levels of UV‐Be3
- Outcome
- plant height, leaf area, and total plant dry weighte3
- Direction
- deleteriouse3
- Setting
- unshaded greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e3“Intermediate levels of UV‐B had deleterious effects on plant height, leaf area, and total plant dry weight at late vegetative and reproductive stages of development”
Claim · model-written summary
Specific leaf weight increased during vegetative growth
- Taxon
- SoybeanGlycine maxe1
- Organ / stage
- vegetative growthe4
- Outcome
- Specific leaf weighte4
- Direction
- increasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e4“Specific leaf weight increased during vegetative growth but was unaffected by UV‐B during reproductive growth stages”
Claim · model-written summary
Specific leaf weight was unaffected by UV-B during reproductive growth stages
- Taxon
- SoybeanGlycine maxe1
- Organ / stage
- reproductive growth stagese4
- Treatment
- UV‐Be4
- Outcome
- Specific leaf weighte4
- Direction
- unaffectede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e4“Specific leaf weight increased during vegetative growth but was unaffected by UV‐B during reproductive growth stages”
Claim · model-written summary
Relative growth, net assimilation and stem elongation rates were decreased by UV-B radiation during vegetative and early reproductive growth stages
- Taxon
- SoybeanGlycine maxe1
- Organ / stage
- vegetative and early reproductive growth stagese5
- Treatment
- UV‐B radiatione5
- Outcome
- Relative growth, net assimilation, and stem elongation ratese5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e5“Relative growth, net assimilation, and stem elongation rates were decreased by UV‐B radiation during vegetative and early reproductive growth stages”
Claim · model-written summary
UV-B effects on growth varied with plant growth stage
- Taxon
- SoybeanGlycine maxe1
- Treatment
- UV‐B radiatione6
- Outcome
- effects of UV‐B radiatione6
- Qualifier
- varied with plant growth stagee6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Soybean ( Glycine max [L.] Merr. cv. Essex) was grown in an unshaded greenhouse”
e6“Mathematical growth analysis revealed that the effects of UV‐B radiation varied with plant growth stage”
The same questions in other papers
uv · growth · Glycine max (soybean)Results differ
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See all 50 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.