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Effect of UV - B Radiation on Plants
2018UV-B is a biologically active portion of ultraviolet light that has significant effects on the development and metabolism of plants. Despite it being a small component of sunlight, it can be damaging to many higher plant species and can cause mutations, damage to genetic material, reductions in photosynthetic activity, lower electron transfer rates ...
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Effects of UV-B Radiation on Photosynthesis
1986Several component reactions of photosynthesis, and net CO2 assimilation rates have been shown to be detrimentally affected by UV-B radiation levels equal to or above those presently received at various locations on the earth’s surface. Many of these studies, however, were completed under environmental conditions that deviated from ambient field ...
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Effects of clouds and haze on UV‐B radiation
Journal of Geophysical Research: Atmospheres, 1996An experiment was conducted over a 6‐month period in Research Triangle Park, North Carolina, to investigate the effects of clouds and haze on ultraviolet (UV) radiation. Data were collected using a Yankee Environmental Systems UVB‐1 pyranometer, an Eppley Laboratory Precision Spectral Pyranometer, and a SCI‐TEC Brewer spectrophotometer.
Jeral G. Estupiñán +4 more
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Atmospheric Evolution and UV-B Radiation
1982The evolutionary role of ozone has potentially significant implications for the evaluation of the sensitivity of present ecosystems to ultraviolet radiation changes. The literature on the evolution of atmospheric oxygen and ozone is reviewed indicating that current understanding has the oxygen content of the atmosphere near zero until about 2 x 109 ...
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Responses of Plants to UV-B Radiation
2001General. 1. Is provitamin D a UV-B photoreceptor in plants? L.O. Bjorn, T. Wang. 2. (Poly)phenolic compounds in pollen and spores of plants as indicators of solar UV-B: a new proxy for the reconstruction of past solar UV-B J. Rozema, et al. 3. The direct effects of UV-B radiation (290-315 nm) on plant litter decomposing at four European field sites S.A.
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UV-B Radiation and Adaptive Mechanisms in Plants
1986Further examples of UV-B dependent formation of UV-B screening pigments have been investigated. This active protective mechanism also has been found to be present in the leaf epidermis of various lightgrown vegetables (greenhouse conditions excluding UV-B radiation).
C. J. Beggs +2 more
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Effects of UV-B Radiation on Wax Biosynthesis
1994Two genotypes of tobacco (Nicotiana tabacum L.) were exposed in controlled environment chambers to three levels of biologically effective ultraviolet-B radiation (UV-BBE; 280-320nm): 0,4.54 (ambient) and 5.66 (≈ 25% enhancement) kJ m-2 d-1. After 28 days, the quantity of wax deposited on leaf surfaces was determined gravimetrically; epicuticular wax ...
Jeremy Barnes +7 more
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Underwater Radiation Measurements: Consequences of an Increased UV-B Radiation
2006Almost all outdoor living organisms are exposed to ultraviolet radiation (UV). Ecosystems experience from morning to evening a strong variation of UV intensity due to diurnal changes in solar elevation, which depends on latitude and time of the year. These changes are the most dominant factor causing short term variation in UV radiation on Earth.
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Radiation therapy‐associated toxicity: Etiology, management, and prevention
Ca-A Cancer Journal for Clinicians, 2021Kyle Wang
exaly