Molecular Plant Pathology - Pathogen Profiles
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Mycosphaerella graminicola: latent infection, crop
devastation and genomics
Claire-Louise Palmer1 and Wendy Skinner2
1 School of Biological Sciences, University of Bristol, Woodland
Road, Clifton, Bristol, BS8 1UG. UK.
2 IACR Long Ashton Research Station, Department of Agricultural
Sciences, University of Bristol, Long Ashton, Bristol BS41 9AF, UK
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| Summary: |
Mycosphaerella graminicola is an important pathogen of wheat,
causing septoria leaf blotch disease. This review summarizes the current
knowledge on disease development and control of the fungus, and discusses
how molecular tools and genomics are being employed to uncover the genetic
basis of pathogenicity.
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| Taxonomy: |
Mycosphaerella graminicola
(Fuckel) J. Schröt. in Cohn (anamorph: Septoria tritici Roberge in
Desmaz.). Kingdom Fungi, Phylum Ascomycota, Class Loculoascomycetes
(filamentous ascomycetes), Order Dothideales, Genus Mycosphaerella,
Species graminicola. |
| Host range: |
Bread and durum wheat (Triticum
aestivum L. and T. turgidum ssp. durum L.) Disease
symptoms: Initiating with the appearance of chlorotic flecks on leaves
that develop into irregular sunken necrotic lesions peppered with tiny
black spots (pycnidia). In addition to the necrotic tissue, the disease
results in early leaf tissue senescence and therefore reduced
photosynthetic capacity. |
| Useful web sites: |
http://cogeme.ex.ac.uk
http://www.plant.wageningen-ur.nl
http://www.paragen.com |
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Symptoms and stages of infection by M. graminicola. (a) Septoria
leaf blotch symptoms on a mature wheat leaf (x3). Small black dots are
asexual pycnidia. Photo courtesy of T. Hunter and D.J. Royle, IACR Long
Ashton Research Station. (b) Penetration of a stomatum from wheat cv.
Riband by M. graminicola isolate L951 (x380). Fungal tissue stained
with Coomassie Brilliant Blue R250.
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