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Green and brown bridges between weeds and crops reveal novel Diaporthe species in Australia

2015/02/12 by Sue Thompson, S.M. Thompson, Yu Pei Tan +10 · 98 citations
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Agronomy #Biology #Botany #Crop #Internal transcribed spacer #Phomopsis #Plant Pathogens and Fungal Diseases #Plant Pathogens and Resistance #Plant-Microbe Interactions and Immunity #Ribosomal RNA #Weed

paper · open access · doi:10.3767/003158515x687506

published in Persoonia - Molecular Phylogeny and Evolution of Fungi 35(1), 39-49 (National Herbarium of the Netherlands)

openalex publication_date 2015/02/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Diaporthe (syn. Phomopsis) species are well-known saprobes, endophytes or pathogens on a range of plants. Several species have wide host ranges and multiple species may sometimes colonise the same host species. This study describes eight novel Diaporthe species isolated from live and/or dead tissue from the broad acre crops lupin, maize, mungbean, soybean and sunflower, and associated weed species in Queensland and New South Wales, as well as the environmental weed bitou bush (Chrysanthemoides monilifera subsp. rotundata) in eastern Australia. The new taxa are differentiated on the basis of morphology and DNA sequence analyses based on the nuclear ribosomal internal transcribed spacer region, and part of the translation elongation factor-1α and ß-tubulin genes. The possible agricultural significance of live weeds and crop residues ('green bridges') as well as dead weeds and crop residues ('brown bridges') in aiding survival of the newly described Diaporthe species is discussed.

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