Screening of <i>Auricularia auricula</i> strains for strong production ability of melanin pigments

ZOU, Yu; MA, Kun

doi:10.1590/1678-457X.00117

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Food Science and Technology

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Research Papers • Food Sci. Technol (Campinas) 38 (1) • Jan-Mar 2018 • https://doi.org/10.1590/1678-457X.00117 copy

Screening of Auricularia auricula strains for strong production ability of melanin pigments

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Melanin pigments have great application value and development potential in food industry to use as nature functional food colorants. In initial study, twenty-two Auricularia auricula strains were screened for stronger production ability of melanin pigments by solid culture. Three A. auricula strains (RF201, QD2 and QD6) with higher pigment production capacity were selected for further study through submerged culture supplementing 1 g/L l-tyrosine. The maximal pigment yields of A. auricula RF201, QD2 and QD6 were 493.9, 367.6 and 318.5 mg/L, respectively. Among three strains, A. auricula RF201 possessed the strongest production ability of melanin pigments. The present study indicated that A. auricula RF201 could be used as potential excellent producer of melanin pigments.

Keywords:
screening; Auricularia auricula; production ability; melanin pigments

Strains	Growth rate (mm/day)	Visual colors
Strains	Growth rate (mm/day)	L*	a*	b*
NKY01	7.9±0.1 ^b	58.9±0.2 ^c	0.6±0.1 ⁿ	19.7±0.1 ^d
F1	4.9±0.2 ^j	58.2±0.4 ^d	3.7±0.1 ^h	20.3±0.6 ^d
F2	5.4±0.1 ^h	52.9±0.2 ^h	6.8±0.2 ^d	23.4±0.5 ^b
F3	3.9±0.2 ^l	57.5±0.3 ^e	5.4±0.1 ^f	25.1±0.2 ^a
F4	5.5±0.1 ^g	49.4±0.2 ^k	7.1±0.2 ^d	21.3±0.5 ^c
F5	6.2±0.1 ^e	51.3±1.4 ^j	5.1±0.5 ^f	19.4±1.4 ^d
QD1	6.8±0.2 ^c	50.9±0.3 ^j	4.4±0.5 ^g	17.5±0.7 ^e
QD2	4.8±0.1 ^j	37.3±0.7 ^o	15.4±0.6 ^a	19.5±1.6 ^d
QD4	5.1±0.1 ⁱ	54.5±0.3 ^g	3.7±0.2 ^h	14.9±0.5 ^g
QD6	6.9±0.2 ^c	40.3±0.4 ⁿ	4.4±0.2 ^g	12.5±0.3 ^j
QD7	5.4±0.1 ^h	53.5±0.5 ^h	1.3±0.1 ^m	11.9±0.4 ^j
QY8582	6.1±0.1 ^f	45.4±1.1 ^m	10.3±0.9 ^b	25.1±0.2 ^a
QY8583	6.5±0.1 ^d	47.3±1.1 ^l	8.9±0.5 ^c	25.3±0.4 ^a
QY8584	4.1±0.2 ^l	59.1±0.1 ^c	2.9±0.1 ⁱ	20.3±0.1 ^d
RF173	5.5±0.1 ^g	52.6±0.1 ⁱ	3.9±0.1 ^h	17.9±0.1 ^e
RF201	5.5±0.1 ^g	36.5±0.2 ^o	6.2±0.1 ^e	13.3±0.1 ⁱ
RF204	6.9±0.2 ^c	57.3±0.2 ^e	1.6±0.1 ^l	15.8±0.3 ^f
RF218	6.6±0.2 ^d	52.4±0.6 ⁱ	5.1±0.5 ^f	19.4±1.2 ^d
RF230	9.3±0.2 ^a	59.9±0.2 ^a	-0.8±0.1 ^o	13.7±0.1 ^h
RF231	4.2±0.1 ^k	59.4±0.3 ^b	5.1±0.1 ^f	25.1±0.3 ^a
RF233	5.1±0.1 ⁱ	56.9±0.1 ^f	2.1±0.1 ^j	15.7±0.2 ^f
RF235	4.8±0.1 ^j	58.9±0.4 ^c	1.9±0.1 ^k	19.5±0.4 ^d

Strains	Incubation time (days)	Pigment yield (mg/L)	Dry weight of mycelium (g/L)
RF201	6	493.9±23.7 ^a	8.1±0.4 ^a
QD2	7	367.6±35.8 ^b	6.3±0.4 ^b
QD6	7	318.5±13.9 ^c	6.8±0.8 ^b

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[1] *Corresponding author: yuzou126@126.com