Molecular epidemiology ofCladosporium carrionii |
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Authors: | M Kawasaki H Ishizaki M Miyaji K Nishimura T Matsumoto S Hombo D Muir |
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Institution: | (1) Biological Control of Insects Research Laboratory, USDA/ARS, Research Park, P.O. Box 7629, 65205 Colombia, MO, USA;(2) Microbial Properties Research Center, USDA/ARS, Peoria, Illinois, USA |
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Abstract: | The effects of cuticle from larvae ofTrichoplusia ni andHelicoverpa (=Heliothis)zea on expression of proteases and chitinases by germinating conidia ofNomuraea rileyi in submerged cultures were studied. Increasing the concentration ofT. ni orH. zea cuticle resulted in a 13- and 15-fold increase in protease activity, respectively. Endochitinase and N-acetylglucosaminidase activity on theT. ni andH. zea substrates increased as cuticular concentrations increased to 2.5%, then stabilized or decreased thereafter. The simultaneous expression of both proteases and chitinases suggests that they are controlled by a multiple-regulatory system.This article reports the results of research only. Mention of a proprietary product in this paper does not constitute a recommendation for use by US Department of Agriculture. |
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Keywords: | Chitinases Entomopathogenic fungi Insect cuticle Nomuraea rileyi Proteases |
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