Morphological, Genetic, and Pathogenic Characterization of <i>Colletotrichum acutatum</i>, the Cause of Anthracnose of Almond in Australia

McKay, Suzanne; Freeman, Stanley; Minz, Dror; Maymon, Marcel; Sedgley, Margaret; Collins, Graham C.; Scott, Eileen S.

doi:10.1094/phyto-99-8-0985

Cited by 32 publications

(14 citation statements)

References 38 publications

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“…The inhibitory effect of temperature on fungi growth is variable, but most pathogens show better development at 20 to 25 °C. For C. acutatum , McKay et al [27] reported that the optimum temperature for mycelial growth was 25 °C, and Harding and Raizada [11] stated that elevated temperatures around 35.5 °C paralyze C. gloeosporioides mycelial growth, corroborating with the results obtained in this study.…”

Section: Resultssupporting

confidence: 90%

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

Maia

Melo

Barreto

et al. 2018

Preprint

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24 The anthropic interference in aquatic ecosystems, favors the disordered colonization of T. domingensis, 25 damaging the production of hydroelectric power and river traffic. Thus, the objective of this study was 26 to evaluate the potential of C. typhae as a mycoherbicide in the control of T. domingensis, in vitro and 27 in greenhouse. 107 samples of symptomatic T. domingensis leaves were collected in flooded areas of 28 rivers in Brazil, with identification and isolation of the collected fungal species. The concentration of 29 inoculum was determined to evaluate the incidence and severity of the disease, the influence of 30 temperature on mycelial growth and conidia germination, the effect of temperature and leaf wetness 31 period on T. domingensis infection by C. typhae and the host range test. The growth of the colonies of 32 C. typhae was higher at 25 to 30 ºC, there was no interference of the photoperiod on germination of the 33 spores, but the highest percentage of germination occurred at 17.39 ºC. The influence of environmental 2 34 conditions on infection of inoculated leaves of T. dominguensis indicated that at 15 ºC and the period of 35 leaf wetness of 48 hours promoted the highest incidence of the disease, as well as the severity for the 36 same period of leaf wetness. The specificity test showed that C. typhae is specific and pathogenic to T. 37 domingensis. Being this the first report of the occurrence of this pathogen in aquatic macrophytes of 38 this species and in T. domingensis in Brazil. 39 Keywords: Biological control; Aquatic macrophytes, Leaf wetness 40 41 Introduction 42 Typha domingensis Pers. is an invasive macrophyte found in the Americas, Europe, Africa, Asia and 43 Oceania, being considered as a native species of South America, occurring throughout Brazil [1]. It is 44 propagated either by seeds or vegetatively, by rhizomes, with vigorous growth by the decomposition 45 and assimilation of organic matter as a source of nutrients, reaching about seven tons of rhizomes per 46 hectare [2]. Thus, T. domingensis is used as a biological filter for urban sewage, industrial effluents rich 47 in heavy metals and erosion control in drainage channels and reservoir banks [3]. 48However, anthropic interference in aquatic ecosystems favors the colonization of T. domingensis, 49 which may hinder the production of hydroelectric power, river traffic and agricultural irrigation [4]. In 50 the United States, this macrophyte accounts for the degradation of almost 12.000 ha -1 of Florida 51 marshes, due its aggressive growth in response to eutrophication by nitrates and phosphates from 52 agricultural and urban waste and frequent fires [5]. In Brazil, it is estimated that the intense growth of 53 T. domingensis in reservoirs of the country's hydroelectric dams extends to about 300 ha -1 in the water 54 mirror. These changes contribute to the reduction of water quality and biodiversity patterns in 55 environments colonized by this species [6]. 56Up to a certain limit, the development of aquatic vegetation c...

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Section: Resultssupporting

confidence: 90%

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

Maia

Melo

Barreto

et al. 2018

Preprint

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“…That strain was isolated together with C. acutatum and was shown to cause lesions on amond fruits in a pathogenicity test (McKay et al 2009). It was first morphologically identified as C. acutatum by the authors and recognised later as C. boninense using molecular data.…”

Section: Resultsmentioning

confidence: 99%

The Colletotrichum boninense species complex

Damm¹,

Cannon²,

Woudenberg³

et al. 2012

Studies in Mycology

358

328

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Although only recently described, Colletotrichum boninense is well established in literature as an anthracnose pathogen or endophyte of a diverse range of host plants worldwide. It is especially prominent on members of Amaryllidaceae, Orchidaceae, Proteaceae and Solanaceae. Reports from literature and preliminary studies using ITS sequence data indicated that C. boninense represents a species complex. A multilocus molecular phylogenetic analysis (ITS, ACT, TUB2, CHS-1, GAPDH, HIS3, CAL) of 86 strains previously identified as C. boninense and other related strains revealed 18 clades. These clades are recognised here as separate species, including C. boninense s. str., C. hippeastri, C. karstii and 12 previously undescribed species, C. annellatum, C. beeveri, C. brassicicola, C. brasiliense, C. colombiense, C. constrictum, C. cymbidiicola, C. dacrycarpi, C. novae-zelandiae, C. oncidii, C. parsonsiae and C. torulosum. Seven of the new species are only known from New Zealand, perhaps reflecting a sampling bias. The new combination C. phyllanthi was made, and C. dracaenae Petch was epitypified and the name replaced with C. petchii. Typical for species of the C. boninense species complex are the conidiogenous cells with rather prominent periclinal thickening that also sometimes extend to form a new conidiogenous locus or annellations as well as conidia that have a prominent basal scar. Many species in the C. boninense complex form teleomorphs in culture.Taxonomic novelties:New combination - Colletotrichum phyllanthi (H. Surendranath Pai) Damm, P.F. Cannon & Crous. Name replacement - C. petchii Damm, P.F. Cannon & Crous. New species - C. annellatum Damm, P.F. Cannon & Crous, C. beeveri Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. brassicicola Damm, P.F. Cannon & Crous, C. brasiliense Damm, P.F. Cannon, Crous & Massola, C. colombiense Damm, P.F. Cannon, Crous, C. constrictum Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. cymbidiicola Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. dacrycarpi Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. novae-zelandiae Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. oncidii Damm, P.F. Cannon & Crous, C. parsonsiae Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir, C. torulosum Damm, P.F. Cannon, Crous, P.R. Johnst. & B. Weir. Typifications: Epitypifications - C. dracaenae Petch.

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“…were used in a preliminary screening of the ISSR primers to identify those that generated reproducible polymorphic markers. For this purpose, 18 ISSR markers were tested: Mf‐2(AC) 8 , Mf‐5(AAC) 5 , Mf‐7(AAG) 8 , Mf‐8(AG) 8 C, Mf‐9(GACA) 4 , Mf‐10(GTG) 5 , SSR2 (ACTG) 4 , SSR10 (CAC) 5 (Villarino et al ., ; and references cited therein), (CAG) 5 , (GACAC) 3 , (GACA) 4 , (GGAT) 4 (McKay et al ., ), (GTC) 6 , (AC) 8 T (Fan et al ., ) and (TCC) 5 , (GCA) 5 , (GACG) 4 , MR (GAG GGT GGC GGT TCT) (Talhinhas et al ., ). Three primers, (ACTG) 4 , (GACG) 4 and Mf‐5(AAC) 5 (Table ), which generated the most reproducible and easily identifiable polymorphic DNA products, were selected for the analysis of all tested Monilinia spp.…”

Section: Methodsmentioning

confidence: 99%

Genetic diversity and pathogenicity of Monilinia polystroma – the new pathogen of cherries

2015

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Brown rot caused by fungi belonging to the genus Monilinia is one of the major limiting factors of sour and sweet cherry production. Up to now, three species, M. fructigena, M. laxa and M. fructicola, have been identified as causal agents of brown rot on cherries worldwide. From 2010 to 2013, during the monitoring of cherry orchards in different areas of Poland, a fourth species, M. polystroma, was isolated from brown rot symptoms on sour and sweet cherry fruits. To the best of the authors' knowledge, this is the first time M. polystroma has been reported as the causal agent of brown rot on cherries. The genetic diversity of M. polystroma isolates from cherries and other hosts was analysed using PCR MP, ISSR and RAPD techniques and showed its clear distinctness from other Monilinia spp. tested. The cluster analysis of fingerprinting data revealed a high similarity of M. polystroma isolates from Poland and their close relationship with the reference strain from Japan, indicating that this species is a recently introduced pathogen. The highest genetic distance between the examined isolates and the highest number of different genotypes was observed in an ISSR assay. Detailed genetic diversity characteristics revealed that M. polystroma isolates from cherries did not create a distinct group but were intermingled with M. polystroma isolates from other hosts. The results of the pathogenicity test conducted on different fruit species indicated a lack of host specificity for M. polystroma isolates.

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Morphological, Genetic, and Pathogenic Characterization of Colletotrichum acutatum, the Cause of Anthracnose of Almond in Australia

Cited by 32 publications

References 38 publications

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

The Colletotrichum boninense species complex

Genetic diversity and pathogenicity of Monilinia polystroma – the new pathogen of cherries

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