Bioactive phenolic substances in important tree species. Part 3: Knots and stemwood of Acacia crassicarpa and A. mangium

Holzforschung ◽  
2005 ◽  
Vol 59 (1) ◽  
pp. 94-101 ◽  
Author(s):  
Suvi P. Pietarinen ◽  
Stefan M. Willför ◽  
Rainer E. Sjöholm ◽  
Bjarne R. Holmbom
Keyword(s):  
Tree Species ◽  
Acacia Mangium ◽  
Acacia Crassicarpa ◽  
Phenolic Substances

Abstract Polyphenols in heartwood, sapwood, and knots of Acacia crassicarpa and Acacia mangium were analysed using GC, GC-MS, HPSEC, and NMR. Melacacidin and isomelacacidin dominated in A. crassicarpa and teracacidin and its ketone in A. mangium. Also, bi- and triflavonoids were tentatively identified in the samples. The amounts of polyphenols were larger in the knots than in the heartwood of both species, while the composition within the species was the same.

scholarly journals Diversité Et Structure Floristiques Sous Des Peuplements d’Acacias Australiens En Zone Forestière De La Côte d’Ivoire

2016 ◽  
Vol 12 (35) ◽  
pp. 229
Author(s):  
Kouadio Kouassi Richard ◽  
Bakayoko Adama ◽  
N’guessan Kanga Anatole ◽  
Konan Djezou
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Acacia Mangium ◽  
Research Station ◽  
Cote D’Ivoire ◽  
Acacia Species ◽  
Côte D'ivoire ◽  
African Flora ◽  
Acacia Crassicarpa ◽  
The Impact

Since thirty years, four Australian Acacias species are introduced and studied in Anguédédou Research station. The station research is located in evergreen forest in the south of Côte d'Ivoire. The objective of the introduction of these species, is to rehabilitate degraded grounds and fallow after growing. The study aims at appreciating the impact of Acacia species on floristic diversity and the regeneration of forest species. For collecting data, we use quadrat method (35 x 50 m and 6 x 6 m).This method permitted the inventory of 212 species on 1.05 ha. Among these species, 1.89 % are Ivorian endemic species and 11.32 % are endemic of West African flora. The flora under the different species of Acacia are relatively diversified and dense. The majority of plant inventoried under Acacia species have small diameters. The highest specific richness average per plots (36 m2) were noted in the 11 years old parcels of Acacia mangium (26.20±2.34) and 27 years old parcels of Acacia auriculaeformis (25.40±2.34) and Acacia crassicarpa (30.60±2.34). The mean values of diameters (dbh ≥ 2.5 cm) fluctuate from 2.94±0.56 cm for the 8 years old stands of Acacia mangium to 8.09±0.56 cm for the 27 years old settlements of Acacia crassicarpa. The results show that leguminous trees can be used for recolonization of the deforested areas in order to rebuild quickly their plant biodiversity.

Canopy knockdown of arthropods in exotic plantations and natural forest in Sabah, north-east Borneo, using insecticidal mist-blowing

1998 ◽  
Vol 88 (1) ◽  
pp. 15-24 ◽  
Author(s):  
V.K. Chey ◽  
J.D. Holloway ◽  
C. Hambler ◽  
M.R. Speight
Keyword(s):  
Tree Species ◽  
Secondary Forest ◽  
Acacia Mangium ◽  
Natural Forest ◽  
Pinus Caribaea ◽  
North East ◽  
Arthropod Species ◽  
Exotic Tree ◽  
Arthropod Biodiversity ◽  
One Year

AbstractCanopy knockdown of arthropods using mist-blowing was carried out in Brumas, Sabah (north-east Borneo), in plantations of exotic (non-indigenous) tree species (Acacia mangium, Eucalyptus deglupta, Gmelina arborea, Paraserianthes [=Albizia] falcataria, and Pinus caribaea), plus secondary natural forest and dense understorey within E. deglupta stands. Each habitat had three 1 m2 samples taken four times in one year. The average arthropod species richness within the stands of the exotic tree species ranged from 27 in E. deglupta, to 68 in natural, secondary forest. The total number of individuals caught ranged from 137 in G. arborea to 1628 in secondary forest. The dense and plant-species rich understorey within E. deglupta stands yielded both higher numbers of species and individuals than the eucalypt trees themselves, indicating the importance of allowing the development of a luxuriant understorey for the enhancement of conservation and biodiversity. Though arthropod biodiversity is reduced by the conversion of tropical forests to plantations, abundance and richness are still substantial in the latter habitats.

scholarly journals Botryosphaeriaceae Species Associated With Cankers and Dieback Symptoms of Acacia mangium and Pinus caribaea var. hondurensis in Venezuela

Plant Disease ◽  
2016 ◽  
Vol 100 (12) ◽  
pp. 2455-2464 ◽  
Author(s):  
J. R. Úrbez-Torres ◽  
F. Castro-Medina ◽  
S. R. Mohali ◽  
W. D. Gubler
Keyword(s):  
Dna Sequences ◽  
Tree Species ◽  
Phylogenetic Analyses ◽  
Elongation Factor ◽  
Acacia Mangium ◽  
Forest Tree ◽  
Pinus Caribaea ◽  
Internal Transcribed Spacer Region ◽  
Forest Tree Species ◽  
Wide Range

Several species in the Botryosphaeriaceae family cause wood stain, cankers, and dieback of trunks and branches in a wide range of forest tree species. The aim of this study was to characterize the botryosphaeriaceous fungi associated with decline symptoms observed in Acacia mangium and Pinus caribaea var. hondurensis, two economically important forest tree species grown in commercial plantations in Venezuela. Fungi isolated from symptomatic samples collected from both hosts in commercial sites were identified based on their morphology and DNA sequences of the internal transcribed spacer region (ITS1-5.8S-ITS2) and part of the β-tubulin and translation elongation factor 1-α genes. Lasiodiplodia theobromae and L. venezuelensis were routinely isolated from A. mangium and P. caribaea var. hondurensis. Additionally, the novel species Diplodia guayanensis was isolated and characterized from symptomatic and asymptomatic tissues of A. mangium. Multigene phylogenetic analyses along with restriction fragment length polymorphism studies further supported the identification of these species. A pathogenicity study was conducted under natural conditions and 12 weeks after inoculation all Botryosphaeriaceae spp. were shown to be highly virulent on A. mangium. Contrary, no lesions were observed in the wood of P. caribaea var. hondurensis when inoculated with L. theobromae and L. venezuelensis. However, both species were consistently reisolated from the asymptomatic tissue beyond the inoculation point. This study contributes to a better understand the role that species in the Botryosphaeriaceae play on disease symptoms and dieback of A. mangium and P. caribaea var. hondurensis from plantations in eastern Venezuela.

scholarly journals Pengaruh Lama Penyimpanan Chip Terhadap Kualitas Pulp

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Rachmawati Apriani ◽  
Muhammad Akbar
Keyword(s):  
Acacia Mangium ◽  
Total Solid ◽  
Kappa Number ◽  
Acacia Crassicarpa

Pada penelitian ini bertujuan untuk mengetahui lama penyimpanan bahan baku chip guna mengetahui kualitas pulp yang dihasilkan dan pengaruhnya apabila disimpan dalam waktu yang lama. Di dalam penelitian ini ada beberapa tahap proses yakni, proses cooking dengan memvariasikan waktu penyimpanan chip selama 1 minggu, 2 minggu, 3 minggu dan 4 minggu dengan bahan baku yang berupa kayu Acacia mangium, Acacia crasicarpa, dan Eucalyptus. Untuk waktu optimum diperoleh maksimal waktu tunggu yakni dua minggu. Semakin lama chip disimpan maka akan membuat tingkat kekeringan chip meningkat sehingga lebih banyak larutan pemasakan yang akan digunakan. Dengan nilai parameter yang dihasilkan minggu kedua total solid acacia mangium 16.23%, acacia crassicarpa 16.78% dan Eucalyptus 17.23%. Nilai yield acacia mangium 54.87%, acacia crassicarpa 54.15% dan Eucalyptus 48.33%. Nilai kappa number Acacia mangium 22.3, Acacia crassicarpa 21.7 dan Eucalyptus 20.4. Nilai viskositas Acacia mangium 1228.23 cm3/gr, Acacia crassicarpa 1200.13 cm3/gr dan eucalyptus 1162.87 cm3/gr. Nilai REA Acacia mangium 9.43 g/L, Acacia crassicarpa 8.73 g/L dan eucalyptus 8.41 g/L. Nilai brightness Acacia mangium 28.23 %, Acacia crassicarpa 24.99 % dan Eucalyptus 37.51 %. Nilai reject Acacia mangium 0.57 %, Acacia crassicarpa 0.42 % dan Eucalyptus 0.31%.

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