Green fluorescent protein as a reporter in the BrassicaLeptosphaeria maculansinteraction

Author: Sexton A.C.   Howlett B.J.  

Publisher: Academic Press

ISSN: 0885-5765

Source: Physiological and Molecular Plant Pathology, Vol.58, Iss.1, 2001-01, pp. : 13-21

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Abstract

Leptosphaeria maculans, the fungus which causes blackleg of oilseed Brassica spp., was transformed with a gene encoding the reporter molecule Green Fluorescent Protein (GFP). The Aspergillus nidulans gpdA promoter was fused to the GFP gene to enable constitutive expression, and this was used to follow disease progression. Also, the GFP gene was fused to the L. maculans promoter for cyanide hydratase (Cht), a fungal enzyme that catalyses the detoxification of cyanide. Northern analyses and fluorescence image analyses of L. maculans transformed with this construct confirmed that GFP transcription occurred under similar conditions to that of Cht. GFP was expressed from the Cht promoter in cotyledon lesions on Brassica napus and Brassica juncea, and the high level of fluorescence in stem lesions indicated that Cht is also transcribed during infection of the stem.

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