Loading…

Effect of caffeine and tannins on cultivation and fructification of Pleurotus on coffee husks

The objective of this work was to study the effect of caffeine and tannins on Pleurotus sp. cultivation and to evaluate the feasibility of using coffee husks as substrate for mushroom cultivation. Eight strains of P. ostreatus and two strains of P. sajor-caju were screened on a medium prepared from...

Full description

Saved in:
Bibliographic Details
Published in:Brazilian journal of microbiology 2006-12, Vol.37 (4), p.420-424
Main Authors: Fan, Leifa(Zhejiang Academy of Agricultural Sciences Institute of Horticulture), Soccol, Andréa Thomaz(Universidade Federal do Paraná Laboratório de Processos Biotecnológicos Departamento de Engenharia Química), Pandey, Ashok(Regional Research Laboratory Biotechnology Division), Vandenberghe, Luciana Porto de Souza(Universidade Federal do Paraná Laboratório de Processos Biotecnológicos Departamento de Engenharia Química), Soccol, Carlos Ricardo(Universidade Federal do Paraná Laboratório de Processos Biotecnológicos Departamento de Engenharia Química)
Format: Article
Language:English
Subjects:
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The objective of this work was to study the effect of caffeine and tannins on Pleurotus sp. cultivation and to evaluate the feasibility of using coffee husks as substrate for mushroom cultivation. Eight strains of P. ostreatus and two strains of P. sajor-caju were screened on a medium prepared from agar extract of coffee husk. Based on best mycelial growth and biomass production, the strain P. ostreatus LPB 09 was selected for detailed studies. With the increase of caffeine concentration, the mycelial growth and the biomass production decreased, and no growth was observed when concentration of caffeine was 2500 mg/L. Furthermore, Pleurotus did not degrade the caffeine, but absorbed it. Tannin under 100 mg/L in the medium stimulated the growth of mycelia, but above 500 mg/L it had a negative effect. When the concentration reached 1000 mg/L, the fungus still survived and showed a certain tolerance to it. No tannic acid was found in the mycelia, but its concentration decreased in the medium. This fact confirmed that Pleurotus had the capacity of degrading tannic acid. Fructification occurred after 20 days of inoculation and the biological efficiency reached about 97% after 60 days. Caffeine content in the husk after cultivation was reduced to 60.7% and tannins to 79.2%. The results indicated the feasibility of using coffee husk without any pretreatment for the cultivation of Pleurotus. O objetivo do presente trabalho foi estudar o efeito da cafeína e taninos sobre o desenvolvimento do fungo Pleurotus sp. e avaliar a possibilidade do uso da casca de café como substrato no seu cultivo. Oito cepas de P. ostreatus e duas cepas de P. sajor-caju foram selecionadas em um meio à base de extrato aquoso de casca de café e Agar. A cepa P. ostreatus LPB 09 foi escolhida para estudos posteriores com base na velocidade de crescimento do micélio e produção de biomassa. O estudo do desenvolvimento do cogumelo em meio com diferentes concentrações de cafeína mostrou que o aumento da concentração da mesma influencia negativamente crescimento. A partir de uma concentração de cafeína de 2500 mg/L não foi observado crescimento. Observou-se ainda que o Pleurotus não degradou a cafeína, mas a absorveu. Os taninos em concentração abaixo de 100 mg/L no meio estimularam o crescimento do micélio, no entanto acima de 500 mg/L mostraram efeito negativo. Quando a concentração de taninos atingiu 1000 mg/L, o cogumelo ainda sobreviveu e mostrou uma certa tolerância. O ácido tânico não foi en
ISSN:1517-8382
1678-4405
1678-4405
DOI:10.1590/S1517-83822006000400003