Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak

This study was specifically carried out to identify host range and pathogenicity of Erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple. The infected pineapple plant showing the symptoms of water-soaked lesions on the basal parts of the leaves in the centre of the whorl, bliste...

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Main Author: Abd Razak, Radziah
Format: Student Project
Language:English
Published: Faculty of Plantation and Agrotechnology 2018
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Online Access:http://ir.uitm.edu.my/id/eprint/22848/1/22848.pdf
http://ir.uitm.edu.my/id/eprint/22848/
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Institution: Universiti Teknologi Mara
Language: English
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spelling my.uitm.ir.228482020-07-30T04:24:29Z http://ir.uitm.edu.my/id/eprint/22848/ Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak Abd Razak, Radziah Fruit and fruit culture Pineapple Pests and diseases This study was specifically carried out to identify host range and pathogenicity of Erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple. The infected pineapple plant showing the symptoms of water-soaked lesions on the basal parts of the leaves in the centre of the whorl, blisters. Meanwhile, infection on pineapple fruits known as a fruit collapse disease with symptoms of exudes juice and unusual odour. Based on previous reports of soft rot diseases caused by Erwinia spp., several commercial fruits in Malaysia that have been identified as potential hosts were selected for a pathogenicity test. The pathogenicity test was conducted onto healthy detached fruits of pineapple, banana, papaya, corn, jackfruit, honeydew, starfruit, mango, dragon fruit, and guava. Each selected fruit was dedicated into three treatments which were artificial inoculated with 8 mm in diameter inoculum discs of pathogen on (i) unwounded fruit skin area, (ii) wounded fruit skin area, and (iii) control (nutrient agar discs without pathogen). A 48 hrs-old culture of E. chrysanthemi grown on nutrient agar was used as source of disease inoculum. All treatments were replicated with six fruits and incubated at 28oC in the moist chambers for 7 days. The experimental results indicated that, among these fruits, only pineapple, banana, and dragon fruit were infected by the pathogen. The remaining fruits did not show any disease incidence and remained as asymptomatic fruits similar as in the control treatment. Besides pineapple, it showed that banana and dragon fruit could become alternative hosts to E. chrysanthemi .Therefore, these crops should be considered before intercropped with pineapple plant. The remaining fruits that did not infected by the pathogen could be used as intercropping plants in the pineapple cultivation without worry on the disease infection and spread. Faculty of Plantation and Agrotechnology 2018 Student Project NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/22848/1/22848.pdf Abd Razak, Radziah (2018) Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak. [Student Project] (Unpublished)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Fruit and fruit culture
Pineapple
Pests and diseases
spellingShingle Fruit and fruit culture
Pineapple
Pests and diseases
Abd Razak, Radziah
Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
description This study was specifically carried out to identify host range and pathogenicity of Erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple. The infected pineapple plant showing the symptoms of water-soaked lesions on the basal parts of the leaves in the centre of the whorl, blisters. Meanwhile, infection on pineapple fruits known as a fruit collapse disease with symptoms of exudes juice and unusual odour. Based on previous reports of soft rot diseases caused by Erwinia spp., several commercial fruits in Malaysia that have been identified as potential hosts were selected for a pathogenicity test. The pathogenicity test was conducted onto healthy detached fruits of pineapple, banana, papaya, corn, jackfruit, honeydew, starfruit, mango, dragon fruit, and guava. Each selected fruit was dedicated into three treatments which were artificial inoculated with 8 mm in diameter inoculum discs of pathogen on (i) unwounded fruit skin area, (ii) wounded fruit skin area, and (iii) control (nutrient agar discs without pathogen). A 48 hrs-old culture of E. chrysanthemi grown on nutrient agar was used as source of disease inoculum. All treatments were replicated with six fruits and incubated at 28oC in the moist chambers for 7 days. The experimental results indicated that, among these fruits, only pineapple, banana, and dragon fruit were infected by the pathogen. The remaining fruits did not show any disease incidence and remained as asymptomatic fruits similar as in the control treatment. Besides pineapple, it showed that banana and dragon fruit could become alternative hosts to E. chrysanthemi .Therefore, these crops should be considered before intercropped with pineapple plant. The remaining fruits that did not infected by the pathogen could be used as intercropping plants in the pineapple cultivation without worry on the disease infection and spread.
format Student Project
author Abd Razak, Radziah
author_facet Abd Razak, Radziah
author_sort Abd Razak, Radziah
title Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
title_short Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
title_full Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
title_fullStr Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
title_full_unstemmed Host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / Radziah Abd Razak
title_sort host range and pathogenicity of erwinia chrysanthemi, a causal pathogen of heart rot disease of pineapple / radziah abd razak
publisher Faculty of Plantation and Agrotechnology
publishDate 2018
url http://ir.uitm.edu.my/id/eprint/22848/1/22848.pdf
http://ir.uitm.edu.my/id/eprint/22848/
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