Add time:08/17/2019         Source:sciencedirect.com

Victorin is a host-selective toxin produced by Cochliobolus victoriae the causal agent of victoria blight of oats. Victorin-binding and biochemical analyses have implicated the glycine decarboxylase complex (GDC), a key component of the photorespiratory cycle, as a possible site of action of the toxin. Plant dependence on a functional GDC is greatest under photorespiratory conditions and photorespiratory activity is increased with increasing light and decreased with increasing concentrations of CO2. We have found that both low light and increased CO2concentrations reduce the extent of victorin-induced symptom development in sensitive oats. These data provide physiological evidence that the GDC is a biologically significant site of action of victorin.

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