The Colletotrichum gloeosporioides species complex

Colletotrichum - current status and future directions.

The Colletotrichum acutatum species complex

Endophytic bacteria: prospects and applications for the phytoremediation of organic pollutants.

Sordariomycetes is one of the largest classes of Ascomycota and is characterised by perithecial ascomata and inoperculate unitunicate asci. The class includes many important plant pathogens, as well as endophytes, saprobes, epiphytes, and fungicolous, lichenized or lichenicolous taxa. The class includes freshwater, marine and terrestrial taxa and has a worldwide distribution. This paper provides an updated outline of the Sordariomycetes and a backbone tree incorporating asexual and sexual genera in the class. Based on phylogeny and morphology we introduced three subclasses; Diaporthomycetidae, Lulworthiomycetidae and Meliolomycetidae and five orders; Amplistromatales, Annulatascales, Falcocladiales, Jobellisiales and Togniniales. The outline is based on literature to the end of 2014 and the backbone tree published in this paper. Notes for 397 taxa with information, such as new family and genera novelties, novel molecular data published since the Outline of Ascomycota 2009, and new links between sexual and asexual genera and thus synonymies, are provided. The Sordariomycetes now comprises six subclasses, 28 orders, 90 families and 1344 genera. In addition a list of 829 genera with uncertain placement in Sordariomycetes is also provided.

Towards a natural classification and backbone tree for Sordariomycetes

Colletotrichum species associated with leaf and flower anthracnose of jasmine (Jasminum sambac) in the Ho Chi Minh region of Vietnam are reported. The disease of jasmine plantations was considered serious as it likely reduced flower yield. Leaves were colonized by Colletotrichum species which formed chlorotic regions with light brown necrotic centres, which eventually covered the whole leaf and subsequently caused defoliation and dieback and whole flowers were blighted. Nine strains of Colletotrichum species were isolated from diseased leaves and flowers and partial ITS rDNA sequences were analysed and morphologies compared across similar species. Based on ITS sequence analysis and morphological characters, three strains were identified as C. truncatum, while one strain was identified as C. siamense. The remaining five strains did not cluster with any known species for which type sequences are available and therefore partial actin (ACT), β-tubulin (TUB2), calmodulin (CAL), glutamine synthetase (GS), glyceraldehyde-3-phosphate dehydrogenase (GPDH) genes of the isolates were sequenced. Based on the reconstructed multiloci molecular phylogeny, two taxa are formally introduced as new species. Another strain was not well resolved in the phylogenetic tree and herein described as Colletotrichum sp. Further studies are needed to prove its distinctiveness. The morphology and growth rate of all taxa are described and compared with similar species.

Colletotrichum species from Jasmine (Jasminum sambac)

Endophytic fungi associated with Stipa grandis in the Inner Mongolia steppe were investigated. Thirty-four fungal taxa were identified from plant tissues obtained in four treatments where different plant functional groups were removed. Nine taxa were obtained from leaves and 25 from roots; and no taxa occurred in both leaves and roots. Colonization rates were significantly higher in roots than in leaves. This finding differs from most previous studies and may be due to the small size of the leaves which grow annually, as compared to the roots which persist from year to year under the ground. Alternaria sp. 1 and Pyrenophora sp., both isolated from leaves, were the dominant species in the four treatments. Fusarium redolens was dominant in the roots in treatments I and II, and Phialophora sp. was dominant in treatments III and IV. Horizontal transmission of endophytes may occur between the same and different grass species. This would normally occur through the roots, again accounting for the higher diversity. The results suggest that surrounding plant diversity or plant composition can affect endophyte communities of S. grandis. If endophyte communities alter with change of functional plant groups, then this is likely to affect the dynamics of ecosystem functioning. Global warming and human activities can increase species extinction, therefore, if some functional groups disappear, then the fungi communities will also change.

Response of endophytic fungi of Stipa grandis to experimental plant function group removal in Inner Mongolia steppe, China

Spore morphologies are a major character in fungal taxonomy, although many isolates are not able to sporulate on common artificial media. This article reviews the effect of nutrition, host tissue, and light on fungal sporulation in artificial media. A trial experiment using 42 strains that failed to sporulate on potato dextrose agar (PDA) and half-strength PDA after 3 months is reported. Five strategies (1/10-strength PDA, CaCO3 water agar, pine needle medium, mulberry agar, and near-ultraviolet light irradiation) were applied to induce these strains to sporulate, with an overall success rate of 62%. Pine needle medium was the most successful method, which induced sporulation of 40% of recalcitrant strains.

Induction of sporulation in plant pathogenic fungi

Epitypification of Colletotrichum musae, the causative agent of banana anthracnose

https://bioone.org/journals/cryptogamie-mycologie/volume-34/issue-4/crym.v34.iss4.2013.349/An-Optimized-Protocol-of-Single-Spore-Isolation-for-Fungi/10.7872/crym.v34.iss4.2013.349.pdf

Yuan-Ying Su

Papers

Colletotrichum species from Jasmine (Jasminum sambac)

Response of endophytic fungi of Stipa grandis to experimental plant function group removal in Inner Mongolia steppe, China

Induction of sporulation in plant pathogenic fungi

Epitypification of Colletotrichum musae, the causative agent of banana anthracnose

An optimized protocol of single spore isolation for fungi