Abstract
AbstractWith soybean cultivars belonging to different maturation groups, the hypersensitive reaction to mechanically inoculated tobacco necrosis virus (TNV) did not induce systemic resistance against challenging viruses that infect locally (TNV) or systemically (alfalfa mosaic virus, AMV; soybean mosaic virus, SbMV). No form of resistance was found when resistance was tested by measuring the area and antigen content of necrotic local lesions induced by challenging TNV, or when it was tested by determining chlorophyll content and viral antigen in tissues systemically infected with AMV or SbMV.Growth of shoots was partially inhibited by the hypersensitive reaction produced by inoculation of TNV in primary soybean leaves. This inhibition was transient and did not appear to be due to stress ethylene produced by the inoculated leaves during lesion development. It was probably a consequence of nutrient depletion due to collapse of primary leaves following virus infection.
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