dc.contributor.author |
Bihon, Wubetu
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dc.contributor.author |
Slippers, Bernard
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dc.contributor.author |
Burgess, Treena I.
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dc.contributor.author |
Wingfield, Michael J.
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dc.contributor.author |
Wingfield, Brenda D.
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dc.date.accessioned |
2011-02-07T06:26:50Z |
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dc.date.available |
2011-02-07T06:26:50Z |
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dc.date.issued |
2011 |
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dc.description.abstract |
Diplodia pinea, an opportunistic and latent pathogen, can significantly affect Pinus productivity worldwide. Despite being studied in South Africa for almost 100 years, the source of D. pinea inoculum responsible for seedling infection is unknown. The aim of this study was to determine the role of seed in vertical transmission of D. pinea and to investigate sources of inoculum leading to horizontal transmission to pine seedlings. Surface-disinfected seeds were inoculated with spore and mycelium suspensions of D. pinea to determine its effect on germination. In addition, isolation of the fungus was performed from surface-disinfected seeds, asymptomatic seedlings collected from nurseries, plantations where pines naturally regenerate and recently established fields, to assess transmission and incidence of endophytic D. pinea infections. Inoculation of seeds with D. pinea spore suspensions affected speed and rate of germination. The fungus was isolated from surface-disinfected seeds in only a few instances (2–3%) and was not found in healthy seedlings collected from greenhouses and nurseries, suggesting that vertical transmission of the fungus does not occur or is rare. In contrast, D. pinea was isolated from 40% of seedlings obtained from the understory of mature P. patula trees showing that horizontal transmission from mature to young trees sustains the D. pinea inoculum in South African pine plantations. |
en |
dc.description.sponsorship |
DST/NRF Centre of Excellence in Tree Health Biotechnology, Tree Protection Co-operative Program, International Foundation for Science through a grant to Mr Wubetu Bihon |
en_US |
dc.identifier.citation |
Bihon, W, Slippers, B, Burgess, TI, Wingfield, MJ & Wingfield, BD 2011, 'Sources of Diplodia pinea endophytic infections in Pinus patula and P. radiata seedlings in South Africa', Forest Pathology, in press. [http://www3.interscience.wiley.com/journal/120081776/grouphome/home.html] |
en |
dc.identifier.issn |
1437-4781 |
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dc.identifier.other |
10.1111/j.1439-0329.2010.00691.x |
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dc.identifier.uri |
http://hdl.handle.net/2263/15820 |
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dc.language.iso |
en |
en_US |
dc.publisher |
Wiley-Blackwell |
en_US |
dc.rights |
Wiley-Blackwell. This is the pre-peer reviewed version of the following article: Bihon, W, Slippers, B, Burgess, TI, Wingfield, MJ & Wingfield, BD 2011, 'Sources of Diplodia pinea endophytic infections in Pinus patula and P. radiata seedlings in South Africa', Forest Pathology which has been published in final form at www.interscience.wiley.com. This article is embargoed by the publisher until 2013. |
en_US |
dc.subject |
Diplodia pinea |
en |
dc.subject.lcsh |
Pinus patula -- Seedlings -- Diseases and pests -- South Africa |
en |
dc.subject.lcsh |
Pinus radiata -- Seedlings -- Diseases and pests -- South Africa |
en |
dc.title |
Sources of Diplodia pinea endophytic infections in Pinus patula and P. radiata seedlings in South Africa |
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dc.type |
Postprint Article |
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