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Variation of heartrot, sapwood infection and polyphenol extractives with provenance of Acacia mangium


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Barry, KM, Irianto, RSB, Tjahjono, B, Tarigan, M, Agustini, L, Hardiyanto, EB and Mohammed, CL 2006 , 'Variation of heartrot, sapwood infection and polyphenol extractives with provenance of Acacia mangium' , Forest Pathology, vol. 36, no. 3 , pp. 183-197 , doi: 10.1111/j.1439-0329.2006.00444.x.

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Infection of heartwood by decay fungi (heartrot) is a concern for growers of Acacia mangium for solidwood
products as the incidence can be high in some regions of Indonesia. Variation of heartrot
incidence for different provenances of A. mangium was determined using two field trials in Sumatra,
Indonesia. In a Riau Province trial of 21 provenances, the effect of provenance was statistically
significant for natural heartrot incidence, which ranged from 1.6% to 27.2%. In a smaller trial using
artificial inoculation in South Sumatra, heartwood infection incidence ranged from 39.4% to 70.8%
across six provenances and both wound type and provenance were statistically significant factors.
There was also significant variation in sapwood infection length related to provenance. Wood
extractives (yield, total phenols, protein-precipitable tannin and 2,3-trans-3,4¢,7,8-tetrahydroxyflavanone)
were quantified from a subsample of trees for each trial. However, no significant differences in
extractive concentration were detectable according to provenance and evidence for a relationship
between heartwood extractives and heartrot incidence was generally poor. While further studies need
to be completed to establish the basis for heartrot incidence, results from these trials allow for
recommendations on provenance selection to reduce heartrot incidence and provide information for
further genetic selection programmes.

Item Type: Article
Authors/Creators:Barry, KM and Irianto, RSB and Tjahjono, B and Tarigan, M and Agustini, L and Hardiyanto, EB and Mohammed, CL
Keywords: heartwood ; decay ; fungi ; Acacia mangium
Journal or Publication Title: Forest Pathology
DOI / ID Number: 10.1111/j.1439-0329.2006.00444.x
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