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Braz J Microbiol. 2018 Apr - Jun;49(2):362-369. doi: 10.1016/j.bjm.2017.04.013. Epub 2017 Nov 5.

The improvement of bioactive secondary metabolites accumulation in Rumex gmelini Turcz through co-culture with endophytic fungi.

Author information

1
Heilongjiang University of Chinese Medicine, Pharmacy College, Harbin, China.
2
The First Affiliated Hospital of Guangdong Pharmaceutical University, Department of Pharmacy, Guangzhou, China.
3
Heilongjiang University of Chinese Medicine, Pharmacy College, Harbin, China. Electronic address: goodluckdd81@126.com.

Abstract

Aspergillus sp., Fusarium sp., and Ramularia sp. were endophytic fungi isolated from Rumex gmelini Turcz (RGT), all of these three strains could produce some similar bioactive secondary metabolites of their host. However the ability to produce active components degraded significantly after cultured these fungi alone for a long time, and were difficult to recover. In order to obtain more bioactive secondary metabolites, the co-culture of tissue culture seedlings of RGT and its endophytic fungi were established respectively, and RGT seedling was selected as producer. Among these fungi, Aspergillus sp. showed the most significant enhancement on bioactive components accumulation in RGT seedlings. When inoculated Aspergillus sp. spores into media of RGT seedlings that had taken root for 20d, and made spore concentration in co-culture medium was 1×104mL-1, after co-cultured for 12d, the yield of chrysophaein, resveratrol, chrysophanol, emodin and physcion were 3.52-, 3.70-, 3.60-, 4.25-, 3.85-fold of the control group. The extreme value of musizin yield was 0.289mg, which was not detected in the control groups. The results indicated that co-culture with endophytic fungi could significantly enhance bioactive secondary metabolites production of RGT seedlings.

KEYWORDS:

Aspergillus sp.; Bioactive secondary metabolites; Endophytic fungi; Rumex gmelini Turcz (RGT); Seedlings

PMID:
29254631
PMCID:
PMC5913822
DOI:
10.1016/j.bjm.2017.04.013
[Indexed for MEDLINE]
Free PMC Article

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