Comparisons of virulence of pathogens associated with crown and root diseases of strawberry in Western Australia with special reference to the effect of temperature

Fang, Xiangling; Phillips, Dennis; Li, Hua; Sivasithamparam, Krishnapillai; Barbetti, Martin J.

doi:10.1016/j.scienta.2011.09.025

Cited by 62 publications

(38 citation statements)

References 25 publications

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“…In general, these accessions displayed symptoms that were less severe in the Spanish than in the Brazilian trial (Table 4). The lower average temperature in the Spanish trial (28 versus 33.6ºC) might explain these results as the virulence of M. phaseolina is influenced by the temperature regime (Fang et al 2011). Even so, all these control accessions ranged from susceptible to highly susceptible to M-248 (Table 4), confirming the aggressiveness of the isolate and the accuracy of the screening procedure in both assays.…”

Section: Insert Tablementioning

confidence: 73%

Screening a variable germplasm collection of Cucumis melo L. for seedling resistance to Macrophomina phaseolina

et al. 2015

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reported to be useful for predicting shoot resistance, were performed, and plants were scored using a scale of disease severity. The average disease severity was calculated for each accession and was used to cluster the accession in five reaction classes. The screening revealed that sources of natural resistance to this fungus are limited. However, seedlings of seven accessions of different botanic groups displayed a resistant response to the stem inoculation, one cantaloup from Israel, one conomon accession from Korea, two wild agrestis and one acidulus from Africa, and two dudaim accessions from Middle East. The response of the F1 progenies varied from susceptibility to high resistance, the latter in progenies from the two agrestis wild types. These results suggest differences in the genetic basis of the resistance in the different selected sources. The resistant accessions are suggested to be screened under field conditions to confirm the level of resistance at adult plant stage and under stressful conditions.

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Section: Insert Tablementioning

confidence: 73%

Screening a variable germplasm collection of Cucumis melo L. for seedling resistance to Macrophomina phaseolina

et al. 2015

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“…The symptomatology of the aerial part was monitored weekly during 10 weeks after inoculation, and was scored based on severity of symptoms according to a scale from 0 to 5 described by Fang et al [19], where 0 corresponds to a healthy plant and 5 to a dead plant. The severity of tissue damage in the crown was assessed at the end of the trial, by making longitudinal cuts of the crowns.…”

Section: Disease Assessmentmentioning

confidence: 99%

“…The disease caused by M. phaseolina is favored when the plants have been subjected to water stress and high temperature conditions [17][18][19]. Symptoms in the strawberry crop include wilting of foliage -older leaves wither and die, young leaves remain alive-, which causes stunted growth.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of strawberry cultivars to root and crown rot caused by Macrophomina phaseolina

Montejo‐Sánchez

Henríquez

Urcola

et al. 2016

JBR

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Abstract. BACKGROUND:A high incidence of root and crown rot of strawberries (Macrophomina phaseolina) has been observed in major strawberry production regions. In Chile, the pathogen was reported in strawberry plants in 2013. A strategy for disease management is the use of resistant cultivars. OBJECTIVE: The aim of this study was to evaluate the susceptibility of eleven strawberry cultivars to the disease. METHODS: Two trials were conducted. A first trial was performed under greenhouse conditions, with plants propagated by runners and inoculated by oat seeds infected with M. phaseolina. The impact of the disease on the growth of the plants and incidence were assessed. The second trial was performed in a growth chamber. Plants were obtained by in-vitro multiplication and were inoculated with a suspension of sclerotia of the same isolate. Plant mortality was assessed. RESULTS: Significant differences in susceptibility were observed among the eleven strawberry cultivars, with 'Florida Festival', 'Amiga' and 'Naiad' as the least susceptible cultivars, while 'Florida Fortuna' was the most susceptible cultivar in both trials. CONCLUSIONS: Differences were detected in terms of susceptibility of cultivars to root and crown rot of strawberry caused by M. phaseolina. This work contributes to knowledge about the susceptibility of strawberry cultivars to this disease.

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“…The negative control was inoculated with wheat kernels and without antagonistic bacteria. The plants were harvested after 30 days from sowing date and some growth parameters were recorded as well disease severity (Fang et al, 2011).…”

Section: Pot Experimentsmentioning

confidence: 99%

Antifungal Activity and Genetic Diversity of Selected Endophytic Fluorescent Pseudomonads

Fathalla

El-Azeem

Baraka

et al. 2015

Journal of Applied Plant Protection

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Fluorescent Pseudomonads have been effectively utilized for controlling major fungal plant diseases because of their antifungal metabolites. In this study, thirty-four bacterial isolates were isolated from root samples of different crops and screened as potential biological control agents against Rhizoctoniasolani AG 2-2, Pythium arrhenomanes and Fusarium solani. On the basis of dual culture assays, twenty isolates were selected for phenotypic characterization, identification and plant growth promoting traits; four isolates were selected for greenhouse studies. The selected Pseudomonas strains were characterized by PCR methods using rpob primer. Eight showed the ability to produce indole acetic acid (IAA) while 12 isolates have no IAA produced, thirteen isolates could solubilize inorganic phosphate and six strains produced hydrogen cyanide. Tested Pseudomonas strains had positive response on bean growth and health.Obtained results indicated that the tested antagonistic fluorescent pseudomonads reduced disease severity in beans and disease development under greenhouse pot experiment. However, further study is needed to apply to these results under field conditions.

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Comparisons of virulence of pathogens associated with crown and root diseases of strawberry in Western Australia with special reference to the effect of temperature

Cited by 62 publications

References 25 publications

Screening a variable germplasm collection of Cucumis melo L. for seedling resistance to Macrophomina phaseolina

Screening a variable germplasm collection of Cucumis melo L. for seedling resistance to Macrophomina phaseolina

Susceptibility of strawberry cultivars to root and crown rot caused by Macrophomina phaseolina

Antifungal Activity and Genetic Diversity of Selected Endophytic Fluorescent Pseudomonads

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