Abstract
Wheat plants were grown at three levels of zinc nutrition in potted soil under controlled conditions. The surface soil in half of the pots was inoculated with a thin layer of milled chaff colonized byFusarium graminearum Group 1. Forty days after sowing, the plants were assessed for dry matter production and the extent of colonization by the pathogen. The concentration of zinc in the plant tissues was also determined.
The zinc status of the plants ranged from severe deficiency through subclinical deficiency to sufficiency. The extent of colonization above the point of infection was decreased significantly by increasing the level of zinc supply. However, colonization of the seminal or secondary roots was not affected by zinc supply, nor was the incidence of infected plants. The unidirectional effect on resistance suggests that zinc has modified the contribution of the xylem flux to the upward spread of the pathogen.
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Sparrow, D.H., Graham, R.D. Susceptibility of zinc-deficient wheat plants to colonization byFusarium graminearum Schw. Group 1. Plant Soil 112, 261–266 (1988). https://doi.org/10.1007/BF02140004
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DOI: https://doi.org/10.1007/BF02140004