L. Dunkle, Vlado Macko
Dec 31, 1995
Citations
0
Influential Citations
16
Citations
Quality indicators
Journal
Botany
Abstract
Peritoxins are low molecular weight, chlorinated peptides produced only by pathogenic strains of the sorghum root rot fungus, Periconia circinata. Genetic data relating sensitivity of sorghum (Sorghum bicolor (L.) Moench) to these toxins and susceptibility to the pathogen are consistent with the hypothesis that both traits are controlled by a single semidominant gene (Pc). At low concentrations (5–500 nM), the toxin selectively reproduces disease symptoms, inhibits growth of primary roots, stops mitosis, induces electrolyte leakage, and enhances the synthesis of a group of 16-kDa proteins and the corresponding mRNAs. Enhanced expression of these 16-kDa proteins and disease symptoms are also induced in a nongenotype-specific manner by treatment with mercury, suggesting that the two events are causally related. However, the upregulation of 16-kDa protein expression induced by a fungal elicitor is independent of visible disease symptoms and is, therefore, not a direct cause of damage. Results of experiments ...