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United States Department of Agriculture

Agricultural Research Service

Title: Effect of Carbohydrates on Chlamydospore Production of Acremonium Cucurbitacearum

Authors
item Cluck, T - EAST CENTRAL UNIVERSITY
item Bruton, Benny
item Biles, C - EAST CENTRAL UNIVERSITY
item Heard, C - EAST CENTRAL UNIVERSITY
item Armengol, J - UNIVERSIDAD POLITECNICA
item Garcia-Jimenez, J - UNIVERSIDAD POLITECNICA

Submitted to: Oklahoma Academy of Science Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: December 6, 1996
Publication Date: N/A

Technical Abstract: Acremonium cucurbitacearum is a soilborne plant pathogen that causes vine decline of melons. Plant roots exude various carbohydrates as they grow through the soil that stimulate fungal growth, taxis, and infection. A. cucurbitacearum was grown on agar plates and in broth shake with different carbon sources to determine the effect on hyphal growth and chlamydospore production. Sucrose stimulated the highest level of hyphal growth. Although significant variation among isolates was observed in chlamydospore production grown on different sugars, the greatest production occurred with isolates grown on galactose, glucose and sucrose. The lowest level of hyphal growth and chlamydospore production occurred with isolates grown on fructose and mannose. Light microscopy revealed that chlamydospores produced in broth shake culture were terminal in most cases and dehiscent. Isolates grown on agar plates tended to produce intercalary chlamydospores. .Chlamydospores of A. cucurbitacearum may play an important role in the epidemiology and overwintering of this pathogen of cantaloupe.

Last Modified: 9/1/2014
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