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Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia

A new disease of jackfruit (Artocarpus heterophyllus) known as fruit bronzing was observed in the Pahang state of Malaysia between 2016 to 2017. Symptoms included yellowish-orange to reddish discoloration of the affected pulps and rags in the fruit. This disease is caused by Pantoea stewartii subspe...

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Main Authors: Mazlan, Safwan, Mohamed Zulperi, Dzarifah, Yusof, Siti Nurdiyana, Abidin, Nuraizat, Ismail Suhaimy, Noor Wahida, Ismail, Siti Izera, Yusof, Mohd Termizi
Format: Conference or Workshop Item
Language:English
Published: Faculty of Agriculture, Universiti Putra Malaysia 2018
Online Access:http://psasir.upm.edu.my/id/eprint/77374/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-53.pdf
http://psasir.upm.edu.my/id/eprint/77374/
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spelling my.upm.eprints.773742020-03-05T06:29:13Z http://psasir.upm.edu.my/id/eprint/77374/ Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia Mazlan, Safwan Mohamed Zulperi, Dzarifah Yusof, Siti Nurdiyana Abidin, Nuraizat Ismail Suhaimy, Noor Wahida Ismail, Siti Izera Yusof, Mohd Termizi A new disease of jackfruit (Artocarpus heterophyllus) known as fruit bronzing was observed in the Pahang state of Malaysia between 2016 to 2017. Symptoms included yellowish-orange to reddish discoloration of the affected pulps and rags in the fruit. This disease is caused by Pantoea stewartii subspecies stewartii (P. stewartii subsp. stewartii), a Gram-negative bacterium that primarily infected corn. It produced typical bacterial wilt or Stewart's wilt disease symptom in corn, sorghum, sudangrass, oat, triticale, and foxtail millet as well as localized rotting in pineapple. The aim of this study is to assess and evaluate the pathogenicity of P. stewartii subsp. stewartii in different local jackfruit cultivars and its other host plants. Three bacterial strains, which were earlier confirmed as of P. stewartii subsp. stewartii through phenotypic and molecular characterization were subjected to pathogenicity test in three different commercial jackfruit cultivars; J32, J33 and Cj3, and to other host plants genus; cucumber and pineapple. The emergence of bronzing symptom and disease severity were recorded daily up to 14 days of inoculation. After two weeks of incubation, the pathogen was re-isolated from infected fruits in order to complete Koch’s Postulates. Reddish-brown symptom was induced in the inoculated jackfruit, but at different time rate for each variety. As for pineapple, the symptom of localized ring was observed, while in inoculated cucumber produced wilting and changed of color from green to yellow. The outcome of this study is expected to enhance our understanding on pathogenic diversity of P. stewartii subsp. stewartii in various local jackfruit cultivars and other major hosts of the bacterium. Faculty of Agriculture, Universiti Putra Malaysia 2018 Conference or Workshop Item PeerReviewed text en http://psasir.upm.edu.my/id/eprint/77374/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-53.pdf Mazlan, Safwan and Mohamed Zulperi, Dzarifah and Yusof, Siti Nurdiyana and Abidin, Nuraizat and Ismail Suhaimy, Noor Wahida and Ismail, Siti Izera and Yusof, Mohd Termizi (2018) Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia. In: Joint Symposium of the 8th International Agriculture Congress 2018 and 6th International Symposium for Food & Agriculture 2018 (8th IAC – 6th ISFA 2018), 13-15 Nov. 2018, Auditorium Rashdan Baba, TNCPI Building, Universiti Putra Malaysia. (pp. 271-272).
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description A new disease of jackfruit (Artocarpus heterophyllus) known as fruit bronzing was observed in the Pahang state of Malaysia between 2016 to 2017. Symptoms included yellowish-orange to reddish discoloration of the affected pulps and rags in the fruit. This disease is caused by Pantoea stewartii subspecies stewartii (P. stewartii subsp. stewartii), a Gram-negative bacterium that primarily infected corn. It produced typical bacterial wilt or Stewart's wilt disease symptom in corn, sorghum, sudangrass, oat, triticale, and foxtail millet as well as localized rotting in pineapple. The aim of this study is to assess and evaluate the pathogenicity of P. stewartii subsp. stewartii in different local jackfruit cultivars and its other host plants. Three bacterial strains, which were earlier confirmed as of P. stewartii subsp. stewartii through phenotypic and molecular characterization were subjected to pathogenicity test in three different commercial jackfruit cultivars; J32, J33 and Cj3, and to other host plants genus; cucumber and pineapple. The emergence of bronzing symptom and disease severity were recorded daily up to 14 days of inoculation. After two weeks of incubation, the pathogen was re-isolated from infected fruits in order to complete Koch’s Postulates. Reddish-brown symptom was induced in the inoculated jackfruit, but at different time rate for each variety. As for pineapple, the symptom of localized ring was observed, while in inoculated cucumber produced wilting and changed of color from green to yellow. The outcome of this study is expected to enhance our understanding on pathogenic diversity of P. stewartii subsp. stewartii in various local jackfruit cultivars and other major hosts of the bacterium.
format Conference or Workshop Item
author Mazlan, Safwan
Mohamed Zulperi, Dzarifah
Yusof, Siti Nurdiyana
Abidin, Nuraizat
Ismail Suhaimy, Noor Wahida
Ismail, Siti Izera
Yusof, Mohd Termizi
spellingShingle Mazlan, Safwan
Mohamed Zulperi, Dzarifah
Yusof, Siti Nurdiyana
Abidin, Nuraizat
Ismail Suhaimy, Noor Wahida
Ismail, Siti Izera
Yusof, Mohd Termizi
Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
author_facet Mazlan, Safwan
Mohamed Zulperi, Dzarifah
Yusof, Siti Nurdiyana
Abidin, Nuraizat
Ismail Suhaimy, Noor Wahida
Ismail, Siti Izera
Yusof, Mohd Termizi
author_sort Mazlan, Safwan
title Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
title_short Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
title_full Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
title_fullStr Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
title_full_unstemmed Investigation on host specificity of Pantoea stewartii subspecies stewartii strains isolated from jackfruit (Artocarpus heterophyllus) infected with bronzing disease in Malaysia
title_sort investigation on host specificity of pantoea stewartii subspecies stewartii strains isolated from jackfruit (artocarpus heterophyllus) infected with bronzing disease in malaysia
publisher Faculty of Agriculture, Universiti Putra Malaysia
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/77374/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-53.pdf
http://psasir.upm.edu.my/id/eprint/77374/
_version_ 1662756653463764992
score 13.211869

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