NDLI: Two new Magnaporthe species pathogenic to warm-season turfgrassses in Australia

Content Provider	Springer Nature Link
Author	Wong, P. T. W. Dong, C. Stirling, A. M. Dickinson, M. L.
Copyright Year	2012
Abstract	Two new species of ectotrophic root-infecting fungi pathogenic to warm-season turfgrasses are described. Magnaporthe garrettii P. T. W. Wong & M. L. Dickinson sp. nov. causes a serious patch disease on couch (Cynodon dactylon) bowling greens in South Australia, and Magnaporthe griffinii P. T. W. Wong & A.M. Stirling sp. nov. is associated with a disease complex (“summer decline”) of hybrid couch (C. dactylon × C. transvaalensis) golf greens in New South Wales and Queensland. Both are homothallic, producing perithecia readily on potato dextrose agar. They differ from other Magnaporthe spp. in having uniseriate rather than biseriate or multiseriate ascospores, and the absence of a conidial anamorph. Analysis of nuclear rRNA ITS sequences has shown that M. griffinii is a new taxon with low homology to M. grisea, M. poae, M. rhizophila, M. salvinii and Gaeumannomyces graminis. This could not be carried out with M. garrettii because there were no living cultures available and the genomic DNA extracted from dead mycelia and perithecia was totally degraded. However, the two new species can be readily distinguished by morphological differences in their perithecia and ascospores. Examination of earlier herbarium specimens has shown that M. garrettii was associated with a patch disease of buffalo grass (Stenotaphrum secundatum) in New South Wales and M. griffinii was associated with diseases of South African couch grass (C. tranvaalensis) in South Australia and of kikuyu grass (Pennisetum clandestinum) in New South Wales.
Starting Page	321
Ending Page	329
Page Count	9
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	41
Issue Number	3
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-01-27
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnaporthe Patch disease Summer decline Cynodon Pennisetum Stenotaphrum Entomology Agriculture Ecology Plant Sciences Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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