Cultivation and nutritional studies of an edible mushroom from North Brazil

Abstract

The vertical mycelial growth to investigate the feasibility of Pleurotus ostreatoroseus DPUA 1720 production in lignocellulosic Amazonic residues was evaluated. Mycelial development was carried out in cupuaçu exocarp (Theobroma grandiflorum Willd Former Spreng Schum), açai seed (Euterpe oleracea) and sawdust as substrates. Each residue was supplemented with rice bran, crown and pineapple peel. The average speed of mycelial growth was determined using three replicates for 15 days at 25°C in the absence and presence of light and mycelial vigor and density were evaluated. Five replicates of the selected substrate were used in mushroom production. Vigorous mycelium and strongly dense growth were observed in cupuaçu exocarp treatment supplemented with rice bran. The biological efficiency, production rate and productivity were 22.90, 54.33 and 3.55%, respectively in this substrate. The basidiomata showed low levels of minerals and fat and can be considered as a source of protein (23.53%) and fiber (12.79%).

Effect of Substrates on Nutritional Composition and Functional Properties of Pleurotus Ostreatus

“…These results are confirmed by Victor and Olatomiwa [30] who obtain moisture content of dried Pleurotus ostreatus ranges from 9.00% to 10.72%. The moisture content of Pleurotus ostreatus harvested from hardwood sawdust (Anogeissus leiocarpus) [32] was higher (8.93% db) than that harvested from softwood sawdust (Daniellia oliveri) (7.88% db) Ogundele, et al [31]. On cottonseed waste the moisture content was 8.45%, which is in the range of report of Manzi, et al [8] for the fruiting bodies of fresh P.ostreatus cultivated on different lignocellulosic agro-wastes.…”

“…The crude fat content of mushroom from hardwood sawdust (Anogeissus leiocarpus) were lower 1.72 % db compare to mushroom harvested from softwood sawdust (Daniellia oliveri) (1.81%) [31]. With rice bran substrate, fat contents was 3.8% [32]. To conclude, Pleurotus cultivated on hardwood sawdust (Anogeissus leiocarpus)…”

“…According to Ogundele, et al [31] there was no significant difference at p < 0.05 in values of ash content of mushroom harvested from the substrates. Although, in an early studies, Tamiris, et al [32] observe significant difference in values of ash content: 9.14, 4.53, 3.96 and 3.45% in rice bran, cupuaçu exocarp, pineapple crown and pineapple peel, respectively.…”

“…Ogundele, et al [31] reported in a study that phosphorus have a value range to (10.36 and 10.09 mg/100 g) for mushroom harvested from hardwood (Anogeissus leiocarpus) sawdust and softwood (Daniellia oliveri) sawdust respectively. Tamiris, et al [32] also reported that in P. ostreatoroseus mushrooms the macrominerals K and P were significant while Mg and Ca were determined in minor amounts.…”

Biotechnological potential of açaí (Euterpe oleracea Mart.) seeds for biofuel production

“…The açaí seed is an oleaginous seed formed by a small solid endosperm attached to a tegument rich in sugars. Several authors have characterized the kernel as containing cellulose (40.29 to 53.2%), hemicellulose (1.26 to 14%), lignin (4 to 22%), lipids (0.61 to 3.56%), total fiber (29 to 63%), total ash (0.15 to 1.7%), variable moisture (10.15%), protein (5 to 7%) and fixed carbon (0.83%) (Rodríguez-zúñiga et al, 2008;Qiu et.al., 2012;Tamiris et al, 2015;Cordeiro et al, 2019;Serrão et al, 2021). However, recent studies have shown that unlike what was previously reported, the fruit is predominantly composed of the polysaccharide mannan -which when hydrolyzed we obtain mannose -and not cellulose.…”