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Ozone Damage to Wheat Varieties at Anthesis 1
Author(s) -
Shan J. G.,
Mulchi C. L.
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400020052x
Subject(s) - ozone , anthesis , cultivar , biology , yield (engineering) , horticulture , field experiment , agronomy , poaceae , winter wheat , chemistry , materials science , organic chemistry , metallurgy
Two wheat ( Triticum aestivum L.) cultivars, ‘Arthur 71’ and ‘Blueboy,’ were exposed to 0.2 ppm ozone at anthesis for 4 hours/day for a week in a growth chamber. Yields were reduced by about 30 and 23% for Arthur '71 and Blueboy, respectively. However, the reduction for Blueboy was not statistically significant. Reductions in seed per plant and seed per head were not significantly different in the ozone treatment as compared to the controls. Cultivars did not always respond in the same way to ozone for the characteristics studied. Ozone only slightly reduced kernel weight in Blueboy as compared to a significant, 17.4% reduction for Arthur '71; however, seed set was significantly reduced by 22.1% in Blueboy compared to 8.3% for Arthur '71. Since the ozone levels used in this experiment are often attained in fields near urban areas, the responses to ozone for wheat yield and yield components for the varieties studied should be comparable to actual field conditions.