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Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars

Greenhouse evaluation of 42 accessions/cultivars of Capsicum spp. to bacterial wilt caused by Ralstonia solanacearum revealed that the Malaysian local cultivar 'Kulai' was highly resistant. Three accessions, namely CO 1969, CO 1970 and CO 1553, were moderately resistant; all other access...

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Main Authors: M. A., Rahman, Abdullah, Hiryati
Format: Article
Language:English
Published: Universiti Putra Malaysia Press 1997
Online Access:http://psasir.upm.edu.my/id/eprint/3647/1/Susceptibility_of_Capsicum_Species_and_Cultivars_to_Ralstonia_solanacearum.pdf
http://psasir.upm.edu.my/id/eprint/3647/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2020%20(1)%20Apr.%201997/01%20JTAS%20Vol.20%20(1)%201997%20(Pg%201-11).pdf
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spelling my.upm.eprints.36472015-09-07T02:11:27Z http://psasir.upm.edu.my/id/eprint/3647/ Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars M. A., Rahman Abdullah, Hiryati Greenhouse evaluation of 42 accessions/cultivars of Capsicum spp. to bacterial wilt caused by Ralstonia solanacearum revealed that the Malaysian local cultivar 'Kulai' was highly resistant. Three accessions, namely CO 1969, CO 1970 and CO 1553, were moderately resistant; all other accessions were susceptible to highly susceptible. Anatomical study of resistant and susceptible cultivars indicated significant differences in certain anatomical characters. The number of vascular strands per root was fewer, the cortex was thicker, and the length of xylem elements was shorter in the roots of resistant cultivars than the susceptible cultivar. The average number of vascular bundles per plant and the number of xylem elements per vascular bundle were fewer and the length and diameter of xylem elements were shorter in the mid-stem of resistant cultivars. These anatomical characters of resistant plants may contribute to limit or slow down the infection process, movement and multiplication of the pathogen. Multiplication ofR. solanacearum at mid-stem, collar and tap root in stem-inoculated susceptible and resistant chilli cultivars revealed that in susceptible cultivars the bacterial population did not differ at all sites tested, but it differed significantly between cultivars at similar sampling sites. These findings show that the mechanism of resistance to the disease is mainly due to the reduced rate of multiplication of the pathogen within the resistant host. Universiti Putra Malaysia Press 1997 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3647/1/Susceptibility_of_Capsicum_Species_and_Cultivars_to_Ralstonia_solanacearum.pdf M. A., Rahman and Abdullah, Hiryati (1997) Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars. Pertanika Journal of Tropical Agricultural Science, 20 (1). pp. 1-11. ISSN 0126-6128 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2020%20(1)%20Apr.%201997/01%20JTAS%20Vol.20%20(1)%201997%20(Pg%201-11).pdf
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 Greenhouse evaluation of 42 accessions/cultivars of Capsicum spp. to bacterial wilt caused by Ralstonia solanacearum revealed that the Malaysian local cultivar 'Kulai' was highly resistant. Three accessions, namely CO 1969, CO 1970 and CO 1553, were moderately resistant; all other accessions were susceptible to highly susceptible. Anatomical study of resistant and susceptible cultivars indicated significant differences in certain anatomical characters. The number of vascular strands per root was fewer, the cortex was thicker, and the length of xylem elements was shorter in the roots of resistant cultivars than the susceptible cultivar. The average number of vascular bundles per plant and the number of xylem elements per vascular bundle were fewer and the length and diameter of xylem elements were shorter in the mid-stem of resistant cultivars. These anatomical characters of resistant plants may contribute to limit or slow down the infection process, movement and multiplication of the pathogen. Multiplication ofR. solanacearum at mid-stem, collar and tap root in stem-inoculated susceptible and resistant chilli cultivars revealed that in susceptible cultivars the bacterial population did not differ at all sites tested, but it differed significantly between cultivars at similar sampling sites. These findings show that the mechanism of resistance to the disease is mainly due to the reduced rate of multiplication of the pathogen within the resistant host.
format Article
author M. A., Rahman
Abdullah, Hiryati
spellingShingle M. A., Rahman
Abdullah, Hiryati
Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
author_facet M. A., Rahman
Abdullah, Hiryati
author_sort M. A., Rahman
title Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
title_short Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
title_full Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
title_fullStr Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
title_full_unstemmed Susceptibility of capsicum species and cultivars to ralstonia solanacearum: Anatomical differences and bacterial multiplication in resistant and susceptible cultivars
title_sort susceptibility of capsicum species and cultivars to ralstonia solanacearum: anatomical differences and bacterial multiplication in resistant and susceptible cultivars
publisher Universiti Putra Malaysia Press
publishDate 1997
url http://psasir.upm.edu.my/id/eprint/3647/1/Susceptibility_of_Capsicum_Species_and_Cultivars_to_Ralstonia_solanacearum.pdf
http://psasir.upm.edu.my/id/eprint/3647/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2020%20(1)%20Apr.%201997/01%20JTAS%20Vol.20%20(1)%201997%20(Pg%201-11).pdf
_version_ 1643822671525314560
score 13.211869

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