Publication: Anatomical characterisation of wood decay pattern in Azadirachta indica (L.) Del. by the white-rot fungi Irpex lacteus and Phanerochaete chrysosporium
Authors
Koyani, Rina Dhirajlal ; Rajput, Kishore Shankarsinh
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DOI
http://dx.doi.org/10.6018/analesbio.37.10
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info:eu-repo/semantics/annotation
Description
Abstract
Caracterización anatómica del patrón de degradación de la
madera de Azadirachta indica A. Juss. por los hongos de la
podedumbre blanca Irpex lacteus y Phanerochaete chrysosporium
En estudios in vitro, la madera de Azadirachta indica, inoculada
con Phanerochaete chrysosporium y Irpex lacteus, fue completamente
invadida en la primera quincena por ambos hongos. No se
observó una pérdida de peso apreciable al final del primer mes
pero, a continuación, se aceleró y, tras 120 días, se registró un 28-
32 % de pérdida de peso. Ambas cepas mostraron delaminación
de las fibras como primer signo de la acción fúngica. Sucesivamente,
se distinguieron orificios en la pared lateral del parénquima,
de forma y tamaño irregular, debido a la deslignificación del margen
de las punteaduras. Aparecieron perforaciones adicionales en
todos los tipos celulares del xilema, excepto en los vasos. En el estado
avanzado, se observó un daño amplio del xilema secundario,
con los vasos relativamente resistente mientras que las células parenquimáticas
radiales fueron el tipo celular más susceptible.
Abstract: In vitro studies on Azadirachta indica wood inoculated with Phanerochaete chrysosporium and Irpex lacteus showed that both fungi completely invade woodblocks within the first fortnight. No appreciable weight loss was observed at the end of first month but subsequently it became faster and 28-32 % weight loss was recorded after 120 days. Both strains showed delamellation of fibres as the first sign of fungal action. Successively, lateral wall pits of parenchyma became distinct and irregular in shape and size due to delignification from pit margin. Additional boreholes occur on all the cell types of xylem except vessels. At the advanced stage, extensive damage was observed in the secondary xylem, in which vessels were relatively resistant while rays were the most susceptible to cell types.
Abstract: In vitro studies on Azadirachta indica wood inoculated with Phanerochaete chrysosporium and Irpex lacteus showed that both fungi completely invade woodblocks within the first fortnight. No appreciable weight loss was observed at the end of first month but subsequently it became faster and 28-32 % weight loss was recorded after 120 days. Both strains showed delamellation of fibres as the first sign of fungal action. Successively, lateral wall pits of parenchyma became distinct and irregular in shape and size due to delignification from pit margin. Additional boreholes occur on all the cell types of xylem except vessels. At the advanced stage, extensive damage was observed in the secondary xylem, in which vessels were relatively resistant while rays were the most susceptible to cell types.
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