Author： Smith J.L. Burritt D.J. Bannister P.
Publisher： Oxford University Press
ISSN： 0305-7364
Source： Annals of Botany, Vol.86, Iss.6, 2000-12, pp. : 1057-1063
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Abstract
When studying the effects of ultraviolet-B (UV-B) radiation on plants, a good measure of UV-B sensitivity is a decrease in dry weight, since this reflects the cumulative effect of many small disruptions in plant function. Measurements of chlorophyll concentration and the level of UV-absorbing compounds are also used to gauge plant health during and after UV-B exposure. When a variety of vegetable crop plants were screened for UV-tolerance, it was found that the levels of chlorophyll and UV-absorbing compounds did not correlate with sensitivity. Biomass accumulation was, however, correlated with UV-sensitivity; plants that accumulated more biomass over a 2-week period were more likely to be UV-B sensitive. This suggests that a rapid growth rate renders plants more sensitive to the injurious effects of UV-B radiation.
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