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2 International Letters of Natural Sciences

2 2014

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New records of lignicolous fungi from Krishna District, Andhra Pradesh, India

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Nagadesi P. K. , Bhavani J. , Arya A.

International Letters of Natural Sciences

2014

tom 12

nr 1

Lignicolous fungi include many wood decay fungi. Studies on molds and decay fungi are necessary to enable us to control their growth on wood and wood products. A survey was undertaken during 2012-2013 to detect the various ligniclous fungi in Andhra Loyola College, Vijayawada and Krishna District, Andhra Pradesh. In a recent study, lignicolous fungi were collected from living trees and fallen branches from Andhra Loyola College, Vijayawada, India. On the basis of occurrence Coriolopsis aspera (Junghuhn) Teng. Fulvifomes nilgheriensis (Montagne) Bondartseva & S. Herrera, Ganoderma australe (Fr.) Pat., G. lucidum (Curtis) P. Karsten, Hexagonia apiaria (Pers.) Fr. Phellinus linteus (Berk. & Curt.) Teng. Trametes cingulata Berk. Hook., T. cotonea (Pat. & Har.) Ryv. T. gibbosa (Pers.) Fr. Schizophyllum commune Fr. were reported from Krishna district for the first time. F. nilgheriensis (Montagne) Bondartseva & S. Herrera is recorded for the first time from India. Even though being preliminary, our results point to the necessity of conservation and protection of recent fungal diversity but, in our opinion, not by making so-called “Red list of endangered species", which, due to the lack of information and very poor evidence on this group of organisms in the region under the consideration, are extremely unreliable and therefore disputable, but rather through the very short list of few not endangered species, conditionally called “White list of not endangered fungal species", if such species recently exist at all.

Delignification of valuable timbers decayed by India lignicolous fungi

100%

Nagadesi P. K. , Arya A.

International Letters of Natural Sciences

2014

tom 11

nr 2

Wood degrading capacity of lignicolous fungi was studied by decay test. In which two methods were followed, i) wood chips method ii) wood block method. Eight timbers infected by six fungi were selected for studying percentage of decay and biochemical test was done to know delignification. After 12 months, 90 % of wood block of T. arjuna was decayed by L. stereoides. In teak wood 16.82 % of decay was due to H. apiaria in 3 months. As the percentage of moisture was less, percentage of weight loss was also less; this indicated that decay capacity of fungi will depends on % moisture content in wood. The percentage loss in hot water soluble substrates was more in case of T. crenulata due to L. stereoides for 5 months, whereas lowest in case of teak wood decayed by H. apiaria for 5 months. The percentage loss in ethanol benzene soluble substrate was more in case of Adina wood decayed by C. versicolor for 5 months, whereas lowest in case of teak wood infected with L. stereoides for 3 months. As the incubation period increases, percentage loss in acid soluble lignin was more in case of infected woods. L. stereoides, C. versicolor, and H. apiaria showed selective delignification in all infected woods, whereas T. pini showed simultaneous degradation of lignin in all woods tested. The valuable timber like teak wood was not resistant to wood decay because they loss 50% of lignin. The in vitro wood decay test can‟t be taken as absolute evidence for wood decay behavior of lignin-degrading fungi, so we should conform decay of wood by consider biochemical test. For rapid evaluation of wood decay the wood chip method was best suitable. For the first time the wood decay and biochemical test of 8 wood samples infected by white rot fungi like S. commune, L. stereoides, H. apiaria, C. versicolor, T. pini and soft rot fungi like T. viride was studied.