Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa
Oil palm seedlings (one-leaf stage) grown from Malaysian seed were inoculated with six African isolates of Fusarium oxysporum f. sp. elaeidis and one African isolate of Fusarium oxysporum var. redolens. All the isolates induced similar symptoms and anatomical responses in the inoculated palms. The p...
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| Format: | Article |
| Language: | English |
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Wiley
1985
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39443/ http://psasir.upm.edu.my/id/eprint/39443/1/3%20-%20Histopathology%20of%20Oil%20Palm%20Seedlings%20Infected%20by%20Pathogenic%20Fusarium%20oxysporum%20Isolates%20from%20Afr.pdf |
| _version_ | 1848849144487084032 |
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| author | Ho, Yin Wan Varghese, George Taylor, G. S. |
| author_facet | Ho, Yin Wan Varghese, George Taylor, G. S. |
| author_sort | Ho, Yin Wan |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Oil palm seedlings (one-leaf stage) grown from Malaysian seed were inoculated with six African isolates of Fusarium oxysporum f. sp. elaeidis and one African isolate of Fusarium oxysporum var. redolens. All the isolates induced similar symptoms and anatomical responses in the inoculated palms. The pathogen invaded the root, bulb, leaf bases and leaves in that sequence. In the root and bulb, infection resulted in plugging of xylem elements with mycelium, conidia, tyloses and gums, disintegration and plugging of phloem tissues, disintegration of plugged vascular elements forming gaps and cavities, and collapse of cortical tissues leading to the isolation of the infected vascular tissues. Formation of hypertrophic or hyperplastic cells in the xylem parenchyma was not observed. Anatomical changes in the infected leaf bases and petioles were similar to those occurring in the infected bulb; except that tyloses were formed less frequently. Generally there was no sign of the pathogen in the wilted leaf blade, but the epidermal, hypodermal and mesophyll cells appeared shrunken or to have collapsed. No hyphae or anatomical changes were observed m the tissues of symptomless inoculated palms. |
| first_indexed | 2025-11-15T09:45:43Z |
| format | Article |
| id | upm-39443 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:45:43Z |
| publishDate | 1985 |
| publisher | Wiley |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-394432015-08-10T08:36:04Z http://psasir.upm.edu.my/id/eprint/39443/ Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa Ho, Yin Wan Varghese, George Taylor, G. S. Oil palm seedlings (one-leaf stage) grown from Malaysian seed were inoculated with six African isolates of Fusarium oxysporum f. sp. elaeidis and one African isolate of Fusarium oxysporum var. redolens. All the isolates induced similar symptoms and anatomical responses in the inoculated palms. The pathogen invaded the root, bulb, leaf bases and leaves in that sequence. In the root and bulb, infection resulted in plugging of xylem elements with mycelium, conidia, tyloses and gums, disintegration and plugging of phloem tissues, disintegration of plugged vascular elements forming gaps and cavities, and collapse of cortical tissues leading to the isolation of the infected vascular tissues. Formation of hypertrophic or hyperplastic cells in the xylem parenchyma was not observed. Anatomical changes in the infected leaf bases and petioles were similar to those occurring in the infected bulb; except that tyloses were formed less frequently. Generally there was no sign of the pathogen in the wilted leaf blade, but the epidermal, hypodermal and mesophyll cells appeared shrunken or to have collapsed. No hyphae or anatomical changes were observed m the tissues of symptomless inoculated palms. Wiley 1985-12 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/39443/1/3%20-%20Histopathology%20of%20Oil%20Palm%20Seedlings%20Infected%20by%20Pathogenic%20Fusarium%20oxysporum%20Isolates%20from%20Afr.pdf Ho, Yin Wan and Varghese, George and Taylor, G. S. (1985) Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa. Journal of Phytopathology, 114 ( 4). art. no. . pp. 312-324. ISSN 0931-1785; ESSN: 1439-0434 |
| spellingShingle | Ho, Yin Wan Varghese, George Taylor, G. S. Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title | Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title_full | Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title_fullStr | Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title_full_unstemmed | Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title_short | Histopathology of oil palm seedlings infected by Pathogenic Fusarium oxysporum isolates from Africa |
| title_sort | histopathology of oil palm seedlings infected by pathogenic fusarium oxysporum isolates from africa |
| url | http://psasir.upm.edu.my/id/eprint/39443/ http://psasir.upm.edu.my/id/eprint/39443/1/3%20-%20Histopathology%20of%20Oil%20Palm%20Seedlings%20Infected%20by%20Pathogenic%20Fusarium%20oxysporum%20Isolates%20from%20Afr.pdf |