Polyporus tenuiculus: a new naturally occurring mushroom that can be industrially cultivated on agricultural waste

Abstract

Polyporus tenuiculus is a naturally occurring species from Central and South America that is consumed by different ethnic groups in the region. To determine the optimal conditions for fruiting body production, two strains were assayed on wheat straw and sawdust with or without supplements. Sixty days of incubation at 25 degrees C were needed to produce a solid block. The highest yield was obtained with strain ICFC 383/00 grown on supplemented willow sawdust. In a second experiment the strain ICFC 383/00 and different supplements were used to improve the biological efficiency (BE) and to determine the quality traits and its biodegradation capacity. The highest yields were obtained on sawdust with 25% of supplements reaching 82.7% of BE. Supplements raised the number of flushes, generally from four to five, contributing to increased yields. The type of substrate had a significant effect on fruiting body diameters of P. tenuiculus, and the largest mushrooms were harvested on supplemented substrate with the highest BE coinciding with the highest dry matter loss in substrates. P. tenuiculus showed a capacity to degrade sawdust, causing a decrease of 67.2-74.5% in cellulose, 80.4-85.7% in hemicellulose, and 60.6-66.2% in lignin content at the end of the cultivation cycle. The decrease in hemicellulose was relatively greater than that of cellulose and lignin on supplemented substrates. This is the first report of the cultivation of P. tenuiculus on lignocellulosic waste, and it is a promising species both for commercial production and for its potential use in the degradation of other biowastes.

Volatile composition and nutritional quality of the edible mushroom Polyporus tenuiculus grown on different agro‐industrial waste

“…Cropping conditions to induce fruiting bodies formation for all substrates were 22 ± 2 °C, 9‐h light/15‐h dark photoperiod (20 W fluorescent light), 75–85% relative humidity levels and watering by spray (fog type) and automatically watering with a fog system for 5 min every 8 h. Fruiting bodies were harvested when mature (see Omarini et al. , 2009) and they were frozen at −20 °C for assays.…”

“…Mushrooms of the genus Polyporus are known to have a great capacity for producing and transforming high-value compounds (Wu et al, 2005), which makes them an interesting subject for further study. We have focused on Polyporus tenuiculus, a species widely distributed in America which is harvested by different ethnic groups for human consumption and to be sold in the markets in Me´xico (Omarini et al, 2009). Recently, Omarini et al (2009) managed to obtain fruiting bodies of P. tenuiculus on agriculture waste.…”

“…We have focused on Polyporus tenuiculus, a species widely distributed in America which is harvested by different ethnic groups for human consumption and to be sold in the markets in Me´xico (Omarini et al, 2009). Recently, Omarini et al (2009) managed to obtain fruiting bodies of P. tenuiculus on agriculture waste. They also studied the sensory attributes of dried specimens and proved that they can vary with the substrate where it is cultivated (Omarini et al, 2010).…”

Effect of cultivating Pleurotus ostreatus on substrates supplemented with herb residues on yield characteristics, substrates degradation, and fruiting bodies’ properties

“…31 Variation in the degradation of components of lignocelluloe is associated with the nature of the substrate and genetic factors of the species. 32 Furthermore, the decrease in lignin content was much lower relative to the other fiber components because of its aromatic, branched, and complex structure, and thus required more time for decomposition by microorganisms. 28 After mushroom cultivation, we analyzed the substrates without mycelial removal; the N contents in spent 45CKI and 60QTC were comparable to the initial substrates, thereby suggesting that N was converted into mycelial mass, and N content significantly increased in spent CC and 30SSC.…”

Crosses between monokaryons of Pleurotus sapidus or Pleurotus florida show an improved biotransformation of (+)-valencene to (+)-nootkatone

“…Dikaryotic strains of Pleurotus (PSA-69, PSA-224 and PFL-216) were cultivated in 500 ml flasks containing 10 g of hemp with a water content of 70% (Omarini et al, 2009). The flasks were autoclaved at 121°C for 1 h. Each flask was inoculated with four agar plugs (10 mm diameter) of mycelia (7-day old culture) grown on SNL-agar Petri dish, and left at 25°C in the dark until the mycelia completely covered the substrate.…”