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Sequential distribution of the mycotoxin deoxynivalenol in wheat spikes after inoculation with Fusarium graminearum.

SAVARD, M.E., SINHA, R.C., SEAMAN, W.L. and FEDAK, G.

Canadian Journal of Plant Pathology 22: 280-285.

2000

บทคัดย่อ

Sequential distribution of the mycotoxin deoxynivalenol in wheat spikes after inoculation with Fusarium graminearum.

One central spikelet of spring wheat (Triticum aestivum) cv. Roblin spikes was inoculated with macroconidia of Fusarium graminearum and the entire spikes were harvested at 2 to day intervals from 2 to 25 days after inoculation. The amount of DON in each spikelet and in each internode of the rachis was measured by ELISA. High concentration of DON were first detected in the inoculated spikelets, 4 days after inoculation. DON concentrations in the spikelets below the inoculation point eventually reached 500-600 mg/kg. Much lower amounts of DON were found in spikelets and rachis above the inoculation point.