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Screening for host responses in Acacia to a canker and wilt pathogen, Ceratocystis manginecans

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Trang, TT ORCID: 0000-0003-4960-5513, Eyles, A ORCID: 0000-0003-4432-6216, Davies, N ORCID: 0000-0002-9624-0935, Glen, M ORCID: 0000-0003-3164-0468, Ratkowsky, D and Mohammed, C ORCID: 0000-0002-2878-1094 2017 , 'Screening for host responses in Acacia to a canker and wilt pathogen, Ceratocystis manginecans' , Forest Pathology, vol. 48, no. 1 , pp. 1-9 , doi: 10.1111/efp.12390.

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Abstract

In Vietnam, the productivity of Acacia hybrid (Acacia mangium x A. auriculiformis) plantations is being threatened by an aggressive canker pathogen, Ceratocystis manginecans and selection for tolerance is the main control strategy. A pot trial was established in Binh Duong province to screen for the host response of nine Acacia genotypes (six Acacia hybrid clones, two A. auriculiformis clones and mixed provenance seedlings of A. mangium) to artificial inoculation with three isolates of C. manginecans. Lesion lengths as measured on the inner bark suggested that the two A. auriculiformis clones were relatively more tolerant to C. manginecans than the A. mangium genotype. In contrast, the lesion lengths of all six Acacia hybrid clones fell between the A. auriculiformis and A. mangium genotypes. The results of this study indicate that among the Acacia hybrid clones, BV10 showed the most tolerance to C. manginecans. Chemical analysis of crude sapwood extracts sampled from the lesion provided some evidence that induced phenolic compounds, particularly tetrahydroxyflavanone and condensed tannins may have a defensive role in the Acacia – C. manginecans pathosystem. However, results were not consistent across individual Acacia hybrid clones and A. mangium genotypes.

Item Type: Article
Authors/Creators:Trang, TT and Eyles, A and Davies, N and Glen, M and Ratkowsky, D and Mohammed, C
Keywords: Acacia genotypes, basidiomycetes, Ceratocystis manginecans, phenolic compounds
Journal or Publication Title: Forest Pathology
Publisher: Blackwell Verlag Gmbh
ISSN: 1437-4781
DOI / ID Number: 10.1111/efp.12390
Copyright Information:

© 2017 Blackwell Verlag GmbHThis is the pre-peer reviewed version of the following article: Trang, T.T., Eyles, A., Davies, N., Glen, M., Ratkowsky, D., Mohammed, C., 2017. Screening for host responses in Acacia to a canker and wilt pathogen, Ceratocystis manginecans, Forest pathology, 48(1) Article e12390, which has been published in final form at http://dx.doi.org/10.1111/efp.12390 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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