Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia

Winged bean (Psophocarpus tetranologobus) is an important vegetable crop grown in various tropical climates around South East Asia and Oceania. Its edible parts include leaves and bean pods. An important disease damaging to winged bean is false rust or orange gall caused by Synchytrium psophocar...

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Main Author:	Karami, Abdollah
Format:	Thesis
Language:	English English
Published:	2010
Subjects:	Bacteria - Pathogenicity Beans - Diseases and pests
Online Access:	http://psasir.upm.edu.my/id/eprint/10716/1/FP_2010_2_A.pdf
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id	my-upm-ir.10716
record_format	uketd_dc
spelling	my-upm-ir.107162013-05-27T07:46:52Z Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia 2010-02 Karami, Abdollah Winged bean (Psophocarpus tetranologobus) is an important vegetable crop grown in various tropical climates around South East Asia and Oceania. Its edible parts include leaves and bean pods. An important disease damaging to winged bean is false rust or orange gall caused by Synchytrium psophocarpi (Rac.) Baumann. It causes the appearance of bright-orange pustules along the veins of young leaves, stems, pods, and sepals of winged bean flowers. It also reduces pod production and seed yield which is more prevalent during rainy season and high moisture. Thus far, there has been no literature documenting the incidences of orange gall and the causal organism on winged bean in Malaysia. The main objective of this study were to record the local distribution of the disease and to characterized of the causal organism. Evaluation of pathogenicity on winged bean and various other leguminous plants was also conducted. Fungi occurring on diseased winged bean leaves, pods and stems collected from the states of Selangor and Johor showed typical symptoms. Samples were examined using light and scanning electron microscope for the characterization of sporangia and zoospores. The sporangia have thin walls that are clear and colorless. At higher magnification (1000x), these sporangia appear to contain yellow or orange granules that can be very dense. The average diameter of each sporangium is about 28.64μm by 40.77μm, implying the variation in the sizes. They were generally spherical than ovoid in shape. This diameter is in accordance with previous reports where the average was about 41.20μm. Bacteria - Pathogenicity Beans - Diseases and pests 2010-02 Thesis http://psasir.upm.edu.my/id/eprint/10716/ http://psasir.upm.edu.my/id/eprint/10716/1/FP_2010_2_A.pdf application/pdf en public masters Universiti Putra Malaysia Bacteria - Pathogenicity Beans - Diseases and pests Faculty of Agriculture English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Bacteria - Pathogenicity Beans - Diseases and pests
spellingShingle	Bacteria - Pathogenicity Beans - Diseases and pests Karami, Abdollah Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
description	Winged bean (Psophocarpus tetranologobus) is an important vegetable crop grown in various tropical climates around South East Asia and Oceania. Its edible parts include leaves and bean pods. An important disease damaging to winged bean is false rust or orange gall caused by Synchytrium psophocarpi (Rac.) Baumann. It causes the appearance of bright-orange pustules along the veins of young leaves, stems, pods, and sepals of winged bean flowers. It also reduces pod production and seed yield which is more prevalent during rainy season and high moisture. Thus far, there has been no literature documenting the incidences of orange gall and the causal organism on winged bean in Malaysia. The main objective of this study were to record the local distribution of the disease and to characterized of the causal organism. Evaluation of pathogenicity on winged bean and various other leguminous plants was also conducted. Fungi occurring on diseased winged bean leaves, pods and stems collected from the states of Selangor and Johor showed typical symptoms. Samples were examined using light and scanning electron microscope for the characterization of sporangia and zoospores. The sporangia have thin walls that are clear and colorless. At higher magnification (1000x), these sporangia appear to contain yellow or orange granules that can be very dense. The average diameter of each sporangium is about 28.64μm by 40.77μm, implying the variation in the sizes. They were generally spherical than ovoid in shape. This diameter is in accordance with previous reports where the average was about 41.20μm.
format	Thesis
qualification_level	Master's degree
author	Karami, Abdollah
author_facet	Karami, Abdollah
author_sort	Karami, Abdollah
title	Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
title_short	Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
title_full	Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
title_fullStr	Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
title_full_unstemmed	Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia
title_sort	characterisation of synchytrium psophocarpi (rac.) baumann and its pathogenicity on winged bean in peninsular malaysia
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Agriculture
publishDate	2010
url	http://psasir.upm.edu.my/id/eprint/10716/1/FP_2010_2_A.pdf
_version_	1747811181125435392

Characterisation of Synchytrium Psophocarpi (Rac.) Baumann and its Pathogenicity on Winged Bean in Peninsular Malaysia

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