Incidence of heartrot in harvest-age Acacia mangium in Indonesia, using a rapid survey method

Barry, KM; Irianto, Ragil S.B.; Santoso, Eddy; Turjaman, Maman; Widyati, Enny; Sitepu, Indrawaty; Mohammed, CL

doi:10.1016/j.foreco.2003.10.017

Cited by 23 publications

(24 citation statements)

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“…The seed source of trees grown in these regions and descriptions of the soil and climate, have been described elsewhere. 4 Freshly harvested logs of trees with and without heart rot were sampled.…”

Section: Plant Materialsmentioning

confidence: 99%

“…1 One of the major impediments to using A. mangium for solid wood products is the prevalence of heart rot, which is fungal decay of heartwood in living trees. [2][3][4] Field studies have revealed that while A. mangium trees are susceptible to heart rot, Acacia auriculiformis and hybrids between the two species appear to be resistant. 5,6 Smaller branch sizes of A. auriculformis have been suggested as a basis for the lower incidence of heart rot 5 because infection is established mostly through dead stubs and branches.…”

Section: Introductionmentioning

confidence: 99%

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Polyphenols in Acacia mangium and Acacia auriculiformis heartwood with reference to heart rot susceptibility

et al. 2005

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The heartwood of Acacia mangium is vulnerable to heart rot and this is the first study to investigate the role of heartwood extractives in its susceptibility. Acacia auriculiformis was compared with A. mangium because it is rarely associated with heart rot. The heartwood extracts of both species were dominated by three flavonoids (2,3-trans-3,4¢,7,8-tetrahydroxyflavanone, teracacidin, and 4¢,7,8,-trihydroxyflavanone), which were purified and identified by nuclear magnetic resonance spectroscopy. The latter compound has not been previously reported in A. mangium and evidence for melacacidin is also newly reported. The mass spectrometric (MS) behavior of these compounds is given, for example teracacidin does not form molecular ions by either electrospray ionization or atmospheric-pressure chemical ionization. The nature of Acacia tannins was compared to quebracho tannin (composed of profisetinidins) using oxidative cleavage to enable MS detection but a negative reaction was obtained for both, which suggests the Acacia tannins may also be of the 5-deoxy proanthocyanidin type. The concentration of flavanones was less when A. mangium heartwood was decayed but the amount of proanthocyanidins was only slightly reduced and therefore these compounds may be more resistant to degradation by heart rot fungi. We found that the total phenol content of A. auriculiformis was about fivefold that of A. mangium, and, while preliminary, this provides evidence for a role played by phenolic extractives in heart rot resistance of these Acacia species.

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Section: Plant Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyphenols in Acacia mangium and Acacia auriculiformis heartwood with reference to heart rot susceptibility

et al. 2005

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“…Pedley]. Foi relatada pela primeira vez por Gibson, em 1981(Lee, 2002, em plantas de 33 meses, na Malásia, e também em Bangladesh, Índia, Indonésia, Papua Nova Guiné, Tailândia e Vietnã (Basak, 1997;Old et al, 2000;Lee, 2002;Barry et al, 2004).…”

Section: Heartrot In Homogeneous Stands Of Acacia Mangiumunclassified

Podridão-do-lenho em plantios homogêneos de Acacia mangium

Halfeld-Vieira

Júnior

Tonini

et al. 2006

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi relatar a ocorrência da podridão-do-lenho em plantios homogêneos de Acacia mangium no Estado de Roraima. A observação dos sintomas iniciais em ferimentos de poda indica que a desrama artificial é um fator de predisposição. Estimativas realizadas em dois talhões comerciais constataram cerca de 8 e 39% de incidência da doença em árvores de três anos. Isolamentos a partir de árvores sintomáticas e testes de patogenicidade demonstram que Lasiodiplodia theobromae pode contribuir no processo de podridão. Este é o primeiro relato da podridão-do-lenho em A. mangium no Brasil, o que pode limitar sua exploração comercial.Termos para indexação: Racosperma mangium, podridão-do-cerne, patologia florestal. Heartrot in homogeneous stands of Acacia mangiumAbstract -The objective of this work was to report the occurrence of heartrot in homogeneous stands of Acacia mangium in the State of Roraima, Brazil. Observations of symptoms initiating from pruning wounds indicated that the artificial pruning is a predisposing factor. A survey carried out in two commercial stands showed 8 and 39% of disease incidence in three-year-old trees. Isolations performed from symptomatic trees and pathogenicity tests demonstrated that the fungus Lasiodiplodia theobromae can incite the rot development. This is the first record of A. mangium heartrot in Brazil. The disease can restrict its commercial exploration.

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“…Rimbawanto (2002) and Barry et al (2004) reported that around 80% of plantations in Indonesia managed by state and private companies are composed of A. mangium. Around 1.3 million ha of A. mangium plantations have been established in Indonesia for pulpwood production (Ministry of Forestry 2003).…”

Section: Introductionmentioning

confidence: 99%