Abstract
Biological spectral weighting functions (BSWF) play a key role in assessing implications of stratospheric ozone reduction. They are used to calculate the increase in biologically effective solar UV radiation due to ozone reduction (radiation amplification factor, RAF), assess current latitudinal gradients of solar UV radiation, and compare solar UV radiation with that from lamps and filters used in experiments. As a basis for a BSWF, we developed an action spectrum for growth responses of light‐grown oat ( Avena sativa L. cv. Otana) seedlings exposed to narrowband UV radiation from a large double water‐prism monochromator. Five UV wavelength peaks were used (275, 297, 302, 313 and 366 nm) in the absence of any visible radiation. Growth responses were measured from 1 to 10 days after the treatments. At all these wavelengths, the UV radiation inhibited height growth, including the height at which the first leaf separated from the stem. Radiation at all wavelengths used, except the one UV‐A wavelength, promoted the length of the second leaf. The resulting action spectrum closely resembles the commonly used generalized plant response function except that it indicates continued sensitivity into the UV‐A region. When used as a BSWF for the ozone depletion problem, this new function for plant growth would suggest substantially less impact of ozone depletion because it results in only a modest increment of biologically effective UV for a given level of ozone depletion (a lower RAF). Yet this new BSWF also suggests that experimental treatments based on previous BSWF with less emphasis on the UV‐A may have resulted in simulations of less pronounced ozone depletion than intended. The validity of this new BSWF with UV‐A sensitivity, designated the UV plant growth weighting function, was verified in field experiments as described in the companion paper.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 6
Claim · model-written summary
UV radiation at all tested wavelengths inhibited oat seedling height growth.
- Taxon
- oat
Avena sativae0 - Material
- Otanae0
- Treatment
- UV radiatione1
- Outcome
- height growthe1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
e1“At all these wavelengths, the UV radiation inhibited height growth, including the height at which the first leaf separated from the stem.”
Claim · model-written summary
UV radiation except the UV-A wavelength promoted second leaf length.
- Taxon
- oatAvena sativae0
- Material
- Otanae0
- Treatment
- Radiation at all wavelengths used, except the one UV‐A wavelengthe1
- Outcome
- length of the second leafe1
- Direction
- promotede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
e1“Radiation at all wavelengths used, except the one UV‐A wavelength, promoted the length of the second leaf.”
Claim · model-written summary
The action spectrum resembled the generalized plant response function but retained UV-A sensitivity.
- Taxon
- oatAvena sativae1
- Outcome
- action spectrume0
- Qualifier
- continued sensitivity into the UV‐A regione0
- Comparator
- generalized plant response functione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The resulting action spectrum closely resembles the commonly used generalized plant response function except that it indicates continued sensitivity into the UV‐A region.”
e1“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
Claim · model-written summary
The new function yields a lower radiation amplification factor and suggests less ozone depletion impact.
- Taxon
- oatAvena sativae1
- Outcome
- impact of ozone depletione0
- Direction
- substantially lesse0
- Qualifier
- a lower RAFe0
- Comparator
- a given level of ozone depletione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this new function for plant growth would suggest substantially less impact of ozone depletion because it results in only a modest increment of biologically effective UV for a given level of ozone depletion (a lower RAF)”
e1“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
Claim · model-written summary
The new function suggests prior experimental treatments simulated less ozone depletion than intended.
- Taxon
- oatAvena sativae1
- Outcome
- simulations of less pronounced ozone depletione0
- Comparator
- than intendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“experimental treatments based on previous BSWF with less emphasis on the UV‐A may have resulted in simulations of less pronounced ozone depletion than intended”
e1“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
Claim · model-written summary
Field experiments verified the UV plant growth weighting function.
- Taxon
- oatAvena sativae1
- Outcome
- validity of this new BSWFe0
- Comparator
- field experimentse0
- Setting
- field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The validity of this new BSWF with UV‐A sensitivity, designated the UV plant growth weighting function, was verified in field experiments”
e1“light‐grown oat ( Avena sativa L. cv. Otana) seedlings”
The same questions in other papers
uv · growth · Avena sativa (oats)Results agree
4 papers in the same direction as this paper
- no effect
- negative
- negative
1 paper more in this group
See all 5 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.