Pathogenicity and epidemiology of Botryosphaeriaceae species isolated from grapevines in Australia

Pitt, Wayne; Huang, Rongfu; Steel, Christopher; Savocchia, Sandra

doi:10.1007/s13313-013-0221-3

Cited by 61 publications

(52 citation statements)

References 27 publications

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“…Cardinal temperatures for growth: between 5 and 35°C, with an optimum of 23.9°C, at which colonies averaged 67 mm on PDA after 72 h (Pitt et al 2013a).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…However, in preliminary pathogenicity studies conducted by Wunderlich et al (2011a) both D. neclivorem (DAR80992) and D. vinea-gemmae (DAR81012), cited as D. viticola, were able to infect and produce necrotic lesions on detached one-year-old canes of Shiraz and Chardonnay within 21 days, while S. plurivora (DAR78872), also as D. viticola, and Dothiorella sp. 1 (DAR78991), once thought to be D. iberica, produced vascular lesions in the trunks of 15-year-old Chardonnay grapevines within 24 months of inoculation under field conditions (Pitt et al 2013a).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…While further collections will undoubtedly yield additional species both in Dothiorella and Spencermartinsia, at this stage it would be speculative to suggest that more taxa will also be described from grapevines, even despite the results of this report. However, if this does prove to be the case, perhaps some consolation can be found in the kno wle dge that ne ith er Dothiore lla n or Spencermartinsia have been shown to be particularly pathogenic, and hence, likely pose a lesser risk to the prosperity and longevity of grapevines than many other genera in the Botryosphaeriaceae (Úrbez-Torres and Gubler 2009;Úrbez-Torres et al 2012;Pitt et al 2013a). In the interim, studies to evaluate promising agents for the management of Botryosphaeria dieback are continuing.…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

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Dothiorella and Spencermartinsia, new species and records from grapevines in Australia

Pitt

Úrbez-Torres

Trouillas

2014

Australasian Plant Pathol.

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Dothiorella and Spencermartinsia are two Botryosphaeriaceous genera found on various woody hosts that bear two-celled conidia that become brown and 1-septate prior to dehiscence from conidiogenous cells. Based on morphological characters and phylogeny of DNA sequences of the internal transcribed spacer (ITS) region and part of the translation elongation factor (TEF) 1-α gene, three new species, namely Spencermartinsia westrale W.M. Pitt, J.R. Úrbez-Torres & Trouillas, Dothiorella neclivorem W.M. Pitt & J.R. Úrbez-Torres and Dothiorella vinea-gemmae W.M. Pitt & J.R. Úrbez-Torres are described from grapevines in Australia. Additionally, Spencermartinsia plurivora Abdollahz., Javadi & A.J.L. Phillips, and a Dothiorella species, currently unnamed but previously isolated from walnut (Juglans regia L.) in France and Iran and hop hornbeam (Ostrya carpinifolia Scop.) in Italy, are reported for the first time in Australia, the latter also for the first time from grapevines.

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“…Cardinal temperatures for growth: between 5 and 35°C, with an optimum of 23.9°C, at which colonies averaged 67 mm on PDA after 72 h (Pitt et al 2013a).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

Section: Phylogenetic Analysesmentioning

confidence: 99%

Section: Phylogenetic Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Dothiorella and Spencermartinsia, new species and records from grapevines in Australia

Pitt

Úrbez-Torres

Trouillas

2014

Australasian Plant Pathol.

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“…To date, at least 30 Botryosphaeriaceae species are known to infect grapevine [4,5,6,7,8,9]. Symptoms of Botryosphaeria dieback consist in woody tissues of grey sectorial necrosis with a brown stripe under the bark as well as typical foliar discolorations in white and red cultivars or wilting leaves in some cases [10,11].…”

Section: Introductionmentioning

confidence: 99%

Flowering as the Most Highly Sensitive Period of Grapevine (Vitis vinifera L. cv Mourvèdre) to the Botryosphaeria Dieback Agents Neofusicoccum parvum and Diplodia seriata Infection

Spagnolo

Larignon

Magnin-Robert

et al. 2014

IJMS

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Botryosphaeria dieback is a fungal grapevine trunk disease that currently represents a threat for viticulture worldwide because of the important economical losses due to reduced yield of affected plants and their premature death. Neofusicoccum parvum and Diplodia seriata are among the causal agents. Vine green stems were artificially infected with N. parvum or D. seriata at the onset of three different phenological stages (G stage (separated clusters), flowering and veraison). Highest mean lesion lengths were recorded at flowering. Major proteome changes associated to artificial infections during the three different phenological stages were also reported using two dimensional gel electrophoresis (2D)-based analysis. Twenty (G stage), 15 (flowering) and 13 (veraison) differentially expressed protein spots were subjected to nanoLC-MS/MS and a total of 247, 54 and 25 proteins were respectively identified. At flowering, a weaker response to the infection was likely activated as compared to the other stages, and some defense-related proteins were even down regulated (e.g., superoxide dismutase, major latex-like protein, and pathogenesis related protein 10). Globally, the flowering period seemed to represent the period of highest sensitivity of grapevine to Botryosphaeria dieback agent infection, possibly being related to the high metabolic activity in the inflorescences.

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“…Griff & Maubl. (Botryosphaeriaceae) was isolated from typical dieback symptoms: reddish-brown lesions originating from leaf axils, yellowing of the leaves and subsequent stem death (Wilson & Pitkethley 1992 (Photita et al 2004;Pavlic et al 2007;Jami et al 2013;Pitt et al 2013), but the evidence for latent infection of noxious woody weeds in Australia is still scarce. What is not clear is the nature of the interaction of endophytes and pathogens obtained from healthy and dieback tree samples when inoculated back to plants in controlled and field conditions.…”

Section: Introductionmentioning

confidence: 99%

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

Sacdalan¹

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In this study, Mimosa pigra dieback is described as plants or population of plants which appeared to suffer from ill health, death of their growing points and the emergence of green reshoots coming from the base. Dieback is an important phenomenon, not only in many crops and natural forests worldwide, but also in many invasive trees and shrubs in Australia. The dieback phenomenon is thought to be caused by complex and interacting factors and causes are often difficult to disentangle. In some cases it is a result of an interaction between both biotic and abiotic factors. Since 1988, dieback has been widely observed in Mimosa pigra L.(Fabaceae), a woody shrub that is one of the most serious exotic invaders of floodplains and riparian areas in the Top End of the Northern Territory. However, there has been no conclusive evidence of links between M. pigra dieback and specific causal factors. In addition, the dieback phenomenon has not been previously quantified.This thesis aimed to describe M. pigra dieback phenomenon at plant and population levels and its effect on plant growth, survival and demography. Specifically, the aim of this thesis was to evaluate the role of biotic factors (insect borers and fungal pathogens), and abiotic factors (soil pH and salinity), in relation to the development of M. pigra dieback. In addition, the thesis examines the pathogenicity of the fungal endophytes/pathogens associated with diebackaffected and healthy M. pigra. M. pigra has been a focus of biological control programs for more than 30 years, but it still remains a serious threat in the wetlands and conservation areas in the Top End of the Northern Territory. While extensive studies have been conducted to evaluate the impact of biological control programs, little is actually known about dieback and its causal factors.To evaluate the causal factors of M. pigra dieback, repeated ground surveys, plant health assessment and specimen collection of stems and soils, were conducted in the period 2011 to 2013 in established M. pigra sites on Melaleuca Station, Mary River, Northern Territory. Insect borers were quantified and putative fungal pathogen abundance were surveyed. A combined morphological and phylogenetic approach was used for fungal pathogens/endophyte identification. Using a subset of isolates, trials were performed to examine differences in the pathogenicity of the recovered fungal pathogens/endophytes.Results of field research showed that dieback in M. pigra is highly dynamic and fluctuates in its severity. Different sites showed increases and/or decreases in plant health over time.iii Dieback affects plants in all age classes, from seedlings, juveniles to adult plants, resulting in partial mortality of plants in all age categories over the trial period. Contrary to expectations, none of the biotic and abiotic factors examined showed a direct relationship to the changing population dynamics of M. pigra dieback over time. Nevertheless, fungal isolations demonstrated that M. pigra is a host to a diverse range of endop...

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Pathogenicity and epidemiology of Botryosphaeriaceae species isolated from grapevines in Australia

Cited by 61 publications

References 27 publications

Dothiorella and Spencermartinsia, new species and records from grapevines in Australia

Dothiorella and Spencermartinsia, new species and records from grapevines in Australia

Flowering as the Most Highly Sensitive Period of Grapevine (Vitis vinifera L. cv Mourvèdre) to the Botryosphaeria Dieback Agents Neofusicoccum parvum and Diplodia seriata Infection

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

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