Valorization of Olive Pruning Residues through Bioconversion into Edible Mushroom Pleurotus ostreatus (Jacq. Ex Fr.) P. Kumm. (1871) of Improved Nutritional Value

Table 4

Mushroom (% fresh weight) and substrate (% dry weight) composition.

	WS		WS : OLPR 3 : 1 (v/v)		WS : OLPR 1 : 3 (v/v)
	S	M	S	M	S	M	S	M
Moisture	12.8 ± 0.2^a	87.7 ± 0.8^A	20.0 ± 0.2^b	87.5 ± 0.9^A	28.7 ± 0.1^c	88.0 ± 0.4^A	0.00	0.57
Total protein	5.5 ± 0.0^b	2.9 ± 0.0^B	5.00 ± 0.1^a	3.7 ± 0.0^C	7.3 ± 0.0^c	2.3 ± 0.0^A	0.00	0.00
Crude fiber	38.4 ± 0.0^a	3.9 ± 0.0^B	38.5 ± 0.0^a	5.3 ± 0.0^C	40.0 ± 0.0^b	2.9 ± 0.0^A	0.00	0.00
Carbohydrates	38.5 ± 0.0^a	6.2 ± 0.0^B	38.6 ± 0.0^a	6.3 ± 0.0^C	40.1 ± 0.0^b	5.0 ± 0.0^A	0.00	0.00
Fat	0.7 ± 0.0^b	0.3 ± 0.0^B	1.04 ± 0.00^c	0.11 ± 0.00^A	0.53 ± 0.00^a	0.11 ± 0.00^A	0.00	0.00
TSS	1.5 ± 0.0^c	0.01 ± 0.00^A	0.16 ± 0.00^a	0.10 ± 0.00^B	0.37 ± 0.00^b	0.11 ± 0.00^C	0.00	0.00
Fructose	0.6 ± 0.0^c	0.01 ± 0.00^A	0.01 ± 0.00^a	0.01 ± 0.02^A	0.04 ± 0.00^b	0.01 ± 0.00^A	0.00	0.21
Glucose	0.7 ± 0.0^c	0.01 ± 0.00^A	0.15 ± 0.00^a	0.09 ± 0.01^B	0.33 ± 0.00^b	0.1 ± 0.0^B	0.00	0.00
Sucrose	0.2 ± 0.0^b	<0.005^A	<0.005^a	<0.005^A	<0.005^a	<0.005^A	0.00	—

Values are mean ± SD; means within the same column followed by the same letters of lowercase (corresponding to substrate: S) or uppercase (corresponding to mushroom: M) are not significantly different at according to Duncan’s multiple range test. WS: wheat straw, OLPR: olive pruning residues, S: substrate, M: mushroom, and TSS: total soluble sugar.