Host-specific toxins from Helminthosporium victoriae (HV) and Periconia circinata (PC) caused gradual decreases in the negative electropotentials of single cells of susceptible but not of resistant plants. When tissues were held in a standard nutrient solution, the decrease (depolarization) induced by HV toxin was approximately 50 mv/hr; the decrease induced by PC toxin was even more gradual. C...

The Pc locus of sorghum (Sorghum bicolor) determines dominant sensitivity to a host-selective toxin produced by the fungal pathogen Periconia circinata. The Pc region was cloned by a map-based approach and found to contain three tandemly repeated genes with the structures of nucleotide binding site-leucine-rich repeat (NBS-LRR) disease resistance genes. Thirteen independent Pc-to-pc mutations w...

abstract the root and foot rot of wheat is one of the important disease of wheat over the world. the root and foot rot of wheat observed more frequently in the resent years at khorasan province (northeast of iran). for investigation the causal agents, several samples were collected from wheat fields of north khorasan in 2007 and 2008. culture of diseased parts of plants on pda resulted. fusariu...

WOLPERT, T. J., and L. D. DUNKLE. 1980. Purification and partial characterization of host-specific toxins produced by Periconia circinata. Phytopathology 70:872-876. Host-specific toxins isolated from culture filtrates of Periconia circinata properties of polyamines. HPLC resolved each of those toxic fractions into inhibited root growth of the susceptible sorghum genotype by 50% at 1 two compou...