Effects of two carboxylic acid anilide fungicides on pustule development and carbohydrate movement and metabolism in barley leaves infected by brown rust puccinia hordei otth

Whipps, J.M.; Roderick, H.W.; Clifford, B.C.; Lewis, D.H.

Journal of Phytopathology (Berlin) 120(3): 216-234

1987


ISSN/ISBN: 0931-1785
DOI: 10.1111/j.1439-0434.1987.tb04436.x
Accession: 005332076

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Abstract
The effects of two concentrations of two carboxylic acid anilide fungicides (benodanil and oxycarboxin) on fungal growth, carbohydrate movement and metabolism in barley leaves infected with Puccinia hordei were investigated using radiological, biochemical and histological techniques. At the higher concentration, both fungicides killed the fungus and prevented normal movement of carbohydrate to the pustules and accumulation of fungal carbohydrates. Autoradiography showed that small amounts of assimilates accumulated at infection sites when leaves or leaf segments were treated with the lower concentration that allowed slight fungal growth. Associated biochemical changes were monitored. Possible mechanisms involved in the alterations caused by the fungicides are discussed.

Effects of two carboxylic acid anilide fungicides on pustule development and carbohydrate movement and metabolism in barley leaves infected by brown rust puccinia hordei otth