||Effect of an Ozone Injury Retardant Chemical on Isozyme Profiles from Alfalfa Callus in vitro.
Rier, J. P. ;
Sood, V. K. ;
Whitaker, A. ;
Watson, C. ;
||Howard Univ., Washington, DC. Dept. of Botany.;Corvallis Environmental Research Lab., OR.
Plant growth ;
Forage grasses ;
Organic compounds ;
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Plant ozone injury retardant (EDU or ethylenediurea) at 1.0 ppm inhibited growth of callus of alfalfa cultivars Williamsburg (ozone-sensitive) and MSB-CW5An2(ozone-insensitive) germplasm of Medicago sative. The presence of EDU(0.1 ppm) in growth medium increased the number of protein and peroxidase isozyme bands in alfalfa cultivar stem callus and ozone modified their intensities. Protein profiles of MSB stem callus from media containing EDU or exposed to ozone were unchanged. Marked differences were observed between the peroxidase profiles of ozonated and control ozone-insensitive stem callus from media containing EDU. Protein profiles of ozonated ozone-insensitive leaf callus differed slightly from controls.