Use of lignocellulosic wastes of pecan (Carya illinoinensis) in the cultivation of Ganoderma lucidum / Utilización de residuos lignocelulósicos de la pacana (Carya illinoinensis) para el cultivo del hongo Ganoderma lucidum

Background: The wastes of pecan nut (Carya illinoinensis (Wangenh.) K. Koch) production are increasing worldwide and have high concentrations of tannins and phenols. Aims: To study the biodegradation of lignocellulosic wastes of pecan used as solid substrate for the cultivation of the white-rot fungus Ganoderma lucidum (Curtis) P. Karst. Methods: Six formulations of pecan wastes were used as solid substrate: pecan shells (PS100), pecan pericarp (PP100), pecan wood-chips (PB100), and the combinations PS50+PP50, PB50+PS50 and PB50+PP50. The substrates were inoculated with a wild strain of G. lucidum collected in the Iberian Peninsula. The biodegradation capability of G. lucidum was estimated by using the mycelial growth rate, the biological efficiency, the production and the dry biological efficiency. Results: Notably, all solid substrates were suitable for G. lucidum growth and mushroom yield. The best performance in mushroom yield was obtained with PB100 (55.4% BE), followed by PB50+PP50 (31.7% BE) and PB50+PS50 (25.4% BE). The mushroom yield in the substrates containing pecan wood-chips (PB) was significantly higher. Conclusions: Our study is leading the way in attempting the cultivation of G. lucidum on lignocellulosic pecan waste. These results show an environmentally friendly alternative that increases the benefits for the global pecan industry, especially in rural areas, and transforms biomass into mushrooms with nutraceutical properties and biotechnological applications

Antecedentes: Los residuos de la producción de pacana (Carya illinoinensis [Wangenh.] K. Koch) se distribuyen por todo el mundo y poseen elevadas concentraciones de taninos y fenoles. Objetivos: Estudiar la biodegradación de los residuos lignocelulósicos de la pacana usados como sustrato sólido para el cultivo de Ganoderma lucidum (Curtis) P. Karst. Métodos: Se utilizaron seis formulaciones de sustratos sólidos a partir de los residuos: cáscara de la nuez (PS100), pericarpio de la nuez (PP100), astillas de ramas de poda (PB100) y las combinaciones PS50+PP50, PB50+PS50 y PB50+PP50. Los sustratos se inocularon con las hifas de una cepa silvestre de G. lucidum procedente de la península ibérica. La capacidad de biodegradación de G. lucidum se estimó mediante el ratio de crecimiento micelial, la eficiencia biológica, la producción de carpóforos y la eficiencia biológica en seco. Resultados: Notablemente, todos los sustratos sólidos utilizados resultaron adecuados para ser colonizados por G. lucidum y producir carpóforos. Los mejores rendimientos en cultivo se obtuvieron con la formulación PB100 (55,4% BE), seguida por PB50+PP50 (31,7% BE) y PB50+PS50 (25,4% BE). La producción de carpóforos en sustratos con astillas de ramas del árbol (PB) fue considerablemente más elevada que en aquellos que no contenían este residuo. Conclusiones: Este estudio muestra la posibilidad de cultivar G. lucidum sobre residuos lignocelulósicos de pacana. Los resultados obtenidos sugieren una alternativa respetuosa con el medio ambiente para el incremento de los beneficios en la industria de la pacana a nivel internacional, especialmente en zonas rurales, al convertir biomasa en la producción de un hongo de interés nutracéutico y con aplicaciones biotecnológicas

Use of lignocellulosic wastes of pecan (Carya illinoinensis) in the cultivation of Ganoderma lucidum.

BACKGROUND: The wastes of pecan nut (Carya illinoinensis (Wangenh.) K. Koch) production are increasing worldwide and have high concentrations of tannins and phenols. AIMS: To study the biodegradation of lignocellulosic wastes of pecan used as solid substrate for the cultivation of the white-rot fungus Ganoderma lucidum (Curtis) P. Karst. METHODS: Six formulations of pecan wastes were used as solid substrate: pecan shells (PS100), pecan pericarp (PP100), pecan wood-chips (PB100), and the combinations PS50+PP50, PB50+PS50 and PB50+PP50. The substrates were inoculated with a wild strain of G. lucidum collected in the Iberian Peninsula. The biodegradation capability of G. lucidum was estimated by using the mycelial growth rate, the biological efficiency, the production and the dry biological efficiency. RESULTS: Notably, all solid substrates were suitable for G. lucidum growth and mushroom yield. The best performance in mushroom yield was obtained with PB100 (55.4% BE), followed by PB50+PP50 (31.7% BE) and PB50+PS50 (25.4% BE). The mushroom yield in the substrates containing pecan wood-chips (PB) was significantly higher. CONCLUSIONS: Our study is leading the way in attempting the cultivation of G. lucidum on lignocellulosic pecan waste. These results show an environmentally friendly alternative that increases the benefits for the global pecan industry, especially in rural areas, and transforms biomass into mushrooms with nutraceutical properties and biotechnological applications.