Evaluation of Schizophyllum commune Fr. potential for biodegradation of lignin: A light microscopic analysis

Lignin biodegradation potential of Schizophyllum commune Fr. is studied by using sound wood blocks of Ailanthus excelsa , Azadirachta indica , Tectona grandis , Eucalyptus sp. and Leucaena leucocephala . Initially, in vitro wood decay test showed minor weight loss, but it became rapid after one mont...

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Bibliographic Details
Published in:Wood material science and engineering 2016-01, Vol.11 (1), p.46-56
Main Authors: Koyani, Rina D., Bhatt, Isha M., Patel, Hiral R., Vasava, Ajit M., Rajput, Kishore S.
Format: Article
Language:English
Subjects:
Ailanthus
Azadirachta
Azadirachta indica
Biodegradation
Boreholes
Eucalyptus
Fibers
Fungi
Leucaena
Leucaena leucocephala
Lignin
Pits
Schizophyllum commune
Separation
Tectona
Tectona grandis
Walls
Weight loss
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Summary:Lignin biodegradation potential of Schizophyllum commune Fr. is studied by using sound wood blocks of Ailanthus excelsa , Azadirachta indica , Tectona grandis , Eucalyptus sp. and Leucaena leucocephala . Initially, in vitro wood decay test showed minor weight loss, but it became rapid after one month. After 120 days of incubation, weight loss was minimum in T. grandis (24.05%) whereas it was maximum in A. excelsa (34.44%). Treated test blocks were characterised by enlargement of pits on ray cell wall, formation of additional boreholes in rays, separation of fibres and cell wall thinning and formation of ‘U’-shape notches. Fungal hyphae moved through the xylem cell lumen, and intercellular spaces formed in response to separation of fibres. Hyphae traverse in adjacent cell through the cell wall pits or by making additional boreholes. In all the species studied, xylem fibres and parenchyma (axial and ray) cells were more susceptible while vessels were resistant to fungal attack. In advanced stage of decay, fibres and axial parenchyma lost their rigidity while vessel walls showed uneven thinning. In the tension wood, G-fibres remained unaffected initially but loosening and separation of gelatinous layer facilitated fungal action and showed similar pattern of cell wall deterioration. Among the wood of different species studied, Tectona was more resistant whereas Ailanthus was more susceptible to fungal attack.
ISSN:1748-0280
1748-0272
1748-0280
DOI:10.1080/17480272.2014.945957