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An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots
Thesis (PhDAgric)--Stellenbosch University, 1971.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867614099537395713 |
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| access_status_str | Open Access |
| author | Joubert, D. J. (Daniel Jakobus) |
| author2 | Orffer, C. J. |
| author_browse | Joubert, D. J. (Daniel Jakobus) Orffer, C. J. |
| author_facet | Orffer, C. J. Joubert, D. J. (Daniel Jakobus) |
| author_sort | Joubert, D. J. (Daniel Jakobus) |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (PhDAgric)--Stellenbosch University, 1971. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/56966 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:46:39.009Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/56966 An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots Joubert, D. J. (Daniel Jakobus) Orffer, C. J. De Vos, M. P. Stellenbosch University. Faculty of AgriSciences. Dept. of Viticulture and Oenology and Institute for Wine Biotechnology . Grapes Grapes -- Roots (Botany) -- Anatomy Meloidae Theses -- Wine biotechnology Dissertations -- Wine biotechnology Thesis (PhDAgric)--Stellenbosch University, 1971. ENGLISH ABSTRACT: The object of this anatomical study was to collect scientific data on the effect of Metoidogyne hapta Chitwood, 1949, on the roots of the following grapevine cultivars viz: Vitis vinifePa L. cvs. Steen and White French and the root-stocks, Jacquez, 1202 C, 99 R, Salt.Creek and Dogridge. These cultivars differed widely in their resistance to M. hapta attacks. In the roots of Steen, White French, Jacquez and 1202 C the formation of multinucleate syncytia by the destruction of the walls of groups of cells often occurred. In Salt Creek, Dogridge and 99 R roots, syncytia were observed in the stele only. The formation o,f abnormal xylem as a result of nematodal activities was a common occurrence. In the roots of these latter three cultivars, M. hapta could not complete its life cycle. Salt Creek, Dogridge, 99 R and often Steen formed a wound periderm which prevented the nematodes from reaching the xylem. Histological changes were often induced in advance of the invading nematodes. AFRIKAANSE OPSOMMING: Die doel met hierdie anatomiese studie was om wetenskaplike inligting te versamel aangaande die uitwerking van Metoidogyne hapta Chitwood, 1949, op enkele cultivars van wingerdstokke,te wete Steen en Fransdruif van Vitis vinifera L. en die onderstokke Jacquez, 1202 C, 99 R, Salt Creek en Dogridge. Hierdie cultivars het onderling baie verskil in hul weerstandvermoe teen M. hapta. Ten gevolge van die vernietiging van die wande van selgroepe, in die wortels van Steen, Fransdruif, Jacquez en 1202 C, is veelkernige sinsiete (Eng. syncytia) gevorm. In die wortels van Salt Creek, Dogridge en 99 R, is sinsiete net in die sentrale silinder waargeneem. Die vorming van abnormale xileem weens nematodiese bedrywighede was 'n baie algemene verskynsel. M. hapta kon in laasgenoemde drie cultivars nie sy lewenskringloop voltooi nie. In Salt Creek, Dogridge, 99 R en dikwels ook in Steen, is wondperiderm gevorm, waardeur die nematodes verhinder was om die xileem te bereik. Die indringende nematodes het voor hulle uit dikwels histologiese veranderinge in die wortels teweeggebring. Doctoral 2012-08-27T11:38:14Z 2012-08-27T11:38:14Z 1971 Thesis http://hdl.handle.net/10019.1/56966 en_ZA Stellenbosch University 209 p. : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Grapes Grapes -- Roots (Botany) -- Anatomy Meloidae Theses -- Wine biotechnology Dissertations -- Wine biotechnology Joubert, D. J. (Daniel Jakobus) An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title | An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title_full | An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title_fullStr | An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title_full_unstemmed | An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title_short | An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots |
| title_sort | anatomical and experimental study on changes induced by meloidogyne hapla chitwood 1949 in vitis roots |
| topic | Grapes Grapes -- Roots (Botany) -- Anatomy Meloidae Theses -- Wine biotechnology Dissertations -- Wine biotechnology |
| url | http://hdl.handle.net/10019.1/56966 |
| work_keys_str_mv | AT joubertdjdanieljakobus ananatomicalandexperimentalstudyonchangesinducedbymeloidogynehaplachitwood1949invitisroots AT joubertdjdanieljakobus anatomicalandexperimentalstudyonchangesinducedbymeloidogynehaplachitwood1949invitisroots |