<i>Erwinia papayae</i> causing papaya dieback in Malaysia

Maktar, N. H.; Kamis, S.; Yusof, Farida Zuraina Mohd; Hussain, N.

doi:10.1111/j.1365-3059.2008.01877.x

Cited by 28 publications

(32 citation statements)

References 2 publications

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“…Luria broth (LB) agar is a nutrient-rich media commonly used to culture the bacteria in the lab [23]. The addition of agar to LB resulted in gel formation, which is suitable for bacteria growing, as these bacteria are able to gather the nutrient from the LB agar without undergo digestion of agar.…”

Section: A Preparation Of the Cultured Samplesmentioning

confidence: 99%

Analysis and feasibility study of plant disease using e-nose

Chang

Zakaria

Nasir

et al. 2014

2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE 2014)

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Agriculture is one of the main sources that contribute to the economic development in the country. However, diseases that attack the crops have given a little impact to the agricultural production. Generally, plant pathologist has the difficulties to detect the symptoms that relate to the plant disease. The plant usually gets infected that are caused by different plant pathogens such as bacteria, fungus and virus that attack the plant.Therefore, some method of solution needs to be uncounted in order to provide faster solution in detecting this disease. In order to overcome this problem, the current study proposes detection of plant disease using an electronic nose (e-nose) called PEN3 e nose. This type of e-nose will detect the volatile organic compounds that are produced by two types of plants which are chilies and papaya. The data that have been collected from PEN3 e-nose are processed using principal component analysis (PCA) and linear discriminant analysis (LDA) methods. In order to validate the detection result, the bacteria sample will be stained based on Gram staining procedure in order to observe the structure and colony of the bacteria cells using a digital microscope. Thus, this study shows that the PEN3 e-nose is able to detect the presence of plant pathogenic bacteria on both chilli and papaya plants.Index Terms-Plant disease, pathogenic bacteria, e-nose, principal component analysis, linear discriminant analysis.

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Section: A Preparation Of the Cultured Samplesmentioning

confidence: 99%

Analysis and feasibility study of plant disease using e-nose

Chang

Zakaria

Nasir

et al. 2014

2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE 2014)

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“…, 2010). In Malaysia, no phytoplasma was found associated with papaya dieback, and the causal agent was identified as Erwinia papayae (Maktar et al. , 2008).…”

Section: Introductionmentioning

confidence: 99%

Use of a real‐time LAMP isothermal assay for detecting 16SrII and XII phytoplasmas in fruit and weeds of the Ethiopian Rift Valley

et al. 2010

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A study to investigate the association of phytoplasmas with papaya dieback and citrus decline syndromes in Ethiopia was carried out between July 2009 and February 2010, with sampling performed in major papaya-and citrus-growing areas of the Rift Valley. Samples of plants with symptoms were collected from papaya, citrus and suspected phytoplasma weed hosts and crops in and around the papaya and citrus fields studied. Nested polymerase chain reaction (nested-PCR) was used for initial characterization, using primers that amplify regions of the 16S rRNA and secA genes, and results were then confirmed with rapid real-time group-specific LAMP (loop-mediated isothermal amplification) assays. The results identified the occurrence of a phytoplasma belonging to the stolbur (16SrXII-A) group in papaya plants showing dieback symptoms, whilst no phytoplasmas were found associated with citrus decline. These results contradict previous reports that a 16SrII phytoplasma was associated with both papaya dieback and citrus decline in Ethiopia, but correspond with the association of a 16SrXII phytoplasmas with Nivum-Haamir-Dieback of papaya in Israel and papaya dieback in Australia. No 16SrXII phytoplasmas were found in any of the weeds and potential alternative hosts studied, although 16SrII phytoplasmas were consistently found in Parthenium hysterophorus weed plants. These results indicate that a 16SrXII phytoplasma is associated with papaya dieback in Ethiopia, whilst the causal agent of citrus decline is not a phytoplasma and remains unidentified.

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“…However, E. psidii was previously associated with watery lesions in the petioles, trunk and fruits of papaya plants found in Malaysia. The authors of that study identified the causal agent of the disease as E. psidii by aligning a partial 16S-rDNA sequence with sequences deposited in GenBank(Chai et al, 2017). This report is very relevant for our knowledge about the geographic distribution and host range of E. psidii, and since up to the time of the study (the year 2016), the pathogen had only been reported on Eucalyptus and Psidium species in South America(Arriel et al, 2014;Coutinho et al, 2011).…”

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confidence: 97%

“…Initial studies have suggested that the host range of this pathogen is restricted to Myrtaceae species. However, E. psidii was recently associated with watery lesions on papaya plants (Chai et al, 2017), indicating a much broader host range. As Myrtaceae is one of the most important families in Brazil and its species are used for various purposes, including as food, ornamentals and pharmacological products, among others, a clear understanding of the host range of E. psidii is important to prevent its dissemination to additional potential host species.…”

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confidence: 99%

Host range ofErwinia psidiiand genetic resistance ofEucalyptusandCorymbiaspecies to this pathogen

Caires

Hermenegildo²,

Guimarães

et al. 2019

Forest Pathology

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Dieback caused by Erwinia psidii is currently one of the most important emerging diseases in eucalypt plantations in Brazil. However, little is known in terms of the host range of this pathogen or the potential sources of resistance against the disease it causes. In this study, we inoculated plants of species from nine families to gain insight into the host range of E. psidii. Plants of all inoculated species of Myrtaceae except Acca sellowiana exhibited disease symptoms and therefore represent potential hosts for the pathogen under natural conditions. In addition, the response of four Corymbia species, 29 Eucalyptus species and three interspecific Eucalyptus hybrids to inoculation with E. psidii was evaluated. All Corymbia henryi, Corymbia maculata, Eucalyptus thozetiana, Eucalyptus cloeziana, Eucalyptus viminalis, Eucalyptus dalrympleana and Eucalyptus pilularis plants were highly resistant to the pathogen, whereas differential disease resistance was observed in the other species. This study provides important information on sources of resistance to Erwinia psidii with potential use in the development of clones with enhanced resistance in eucalypt species of economic importance.

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Erwinia papayae causing papaya dieback in Malaysia

Cited by 28 publications

References 2 publications

Analysis and feasibility study of plant disease using e-nose

Analysis and feasibility study of plant disease using e-nose

Use of a real‐time LAMP isothermal assay for detecting 16SrII and XII phytoplasmas in fruit and weeds of the Ethiopian Rift Valley

Host range ofErwinia psidiiand genetic resistance ofEucalyptusandCorymbiaspecies to this pathogen

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