title: Systemic acquired resistance induced in hypersensitive plants by nonnecrotic localized viral infections.
abstract: Localized symptomless infections of cucumber cotyledons and first foliage leaves by tobacco mosaic virus (TMV) induced systemic acquired resistance in other leaves of the same plants inoculated 2 weeks later with tobacco necrosis virus. Diameters of lesions that developed after the second inoculation were 35% less and lesion numbers were 30% fewer than in control plants not previously inoculated with TMV. Thus, necrosis after the first inoculation was not prerequisite to virus-induced systemic acquired resistance.
authors.affiliation: Department of Plant Pathology, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Roberts