Abstract
Effects of ozone (O 3 ) and peanut stunt virus (PSV) on two clones of white clover (Trifolium repens) were measured in open-top field chambers. An O3-resistant clone (NC-R) and an 03-sensitive clone (NC-S), with and without PSV infection, were exposed to O 3 for 12-h day -1 for 111 days. The exposures were proportional to ambient O 3 and resulted in 12-h day -1 mean concentrations of 26, 45, 64, and 76 nL L -1 for the 111 days of exposure. Plant shoots were harvested five times to measure effects of O 3 and PSV on foliar injury, foliar chlorophyll, and shoot dry weight (...)
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