The Response Of Selected Phaseolus vulgaris L. Cultivars To Ozone Under Controlled Fumigation And Ambient Field Levels

Hucl, P.; Beversdorf, W.D.

Canadian Journal of Plant Science 62(3): 561-569


ISSN/ISBN: 0008-4220
DOI: 10.4141/cjps82-085
Accession: 068494235

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In 1977, a cross section of the Phaseolus vulgaris L. world collection was screened for ozone insensitivity in fumigation chambers. A number of cultivars were selected for their high level of insensitivity to ozone (O3). These selections, along with three cultivars reported as highly insensitive and a number of white bean cultivars, were further evaluated under more stringent conditions in a controlled environment as well as under field conditions over a 2-yr period. All the white bean cultivars were sensitive to O3 under controlled conditions, but under field conditions later maturing cultivars escaped serious injury from ambient O3 levels. Early-maturing white bean cultivars tended to suffer reduced yields and earlier senescence compared with plots chemically protected from ambient O3 injury. The yields of cultivars selected as O3 insensitive in chamber fumigations were not affected by ambient field O3 levels in the field trials.