OBJECTIVETo isolate and identify the high-yield poly-malic acid (PMLA) bacterial strains from the nature.

METHODSSamples were collected and cultured. The high-yield PMLA bacterial strains were screened through morphological observation, qualitative PMLA tests by HPLC and ITS sequence analysis on the isolated bacterial strains.

RESULTSA high-yield PMLA strain II 04 was isolated, the yield of PMLA of the strain reached to 26.23g/L in the rotary shaker at 25 degree for 7d. From morphological observation and ITS sequences analysis, the strain belonged to Aureobasidium pullulans, and named as Aureobasidium pullulans ZUCC-41.

CONCLUSIONA high-yield bacterial strain has been isolated from the nature and identified to be Aureobasidium pullulans.

Fermentation ; Malates ; metabolism ; Mitosporic Fungi ; isolation & purification ; metabolism ; Polymers ; metabolism

The efficient production of lignocellulolytic enzyme systems is an important support for large-scale biorefinery of plant biomass. On-site production of lignocellulolytic enzymes could increase the economic benefits of the process by lowering the cost of enzyme usage. Penicillium species are commonly found lignocellulose-degrading fungi in nature, and have been used for industrial production of cellulase preparations due to their abilities to secrete complete and well-balanced lignocellulolytic enzyme systems. Here, we introduce the reported Penicillium species for cellulase production, summarize the characteristics of their enzymes, and describe the strategies of strain engineering for improving the production and performance of lignocellulolytic enzymes. We also review the progress in fermentation process optimization regarding the on-site production of lignocellulolytic enzymes using Penicillium species, and suggest prospect of future work from the perspective of building a "sugar platform" for the biorefinery of lignocellulosic biomass.
Biomass ; Cellulase/metabolism* ; Fermentation ; Fungi/metabolism* ; Lignin/metabolism* ; Penicillium

Biological Evolution ; Chitin ; chemistry ; metabolism ; Fungi ; classification ; genetics ; metabolism ; Phylogeny

Some degradation products from lignocellulose pretreatment strongly inhibit the activities of cellulolytic enzymes and ethanol fermentation strains, thus the efficient removal of the inhibitor substances ("detoxification") is the inevitable step for the biotransformation processes. In this study, the biological detoxification of furfural by a newly isolated fungus, Amorphotheca resinae ZN1, was studied and the metabolic pathways of furfural degradation was analyzed. The metabolic pathway of furfural degradation in A. resinae ZN1 was described as follows: first, furfural was quickly converted into the low toxic furfuryl alcohol; then the furfuryl alcohol was gradually converted into furfural again but under the low concentration under aerobic condition, which was not lethal to the growth of the fungi; furfural continued to be oxidized to furoic acid by A. resinae ZN1. It is likely that furoic acid was further degraded in the TCA cycle to complete the biological degradation of furfural. The present study provided the important experimental basis for speeding up the biodetoxification of furfural by A. resinae ZN1 and the rate-limiting step in the lignocellulose biotransformation to ethanol.
Biodegradation, Environmental ; Biotransformation ; Ethanol ; metabolism ; Fermentation ; Fungi ; metabolism ; Furaldehyde ; isolation & purification ; metabolism ; Furans ; metabolism ; Lignin ; metabolism

Animals ; Biological Evolution ; Fungi ; genetics ; Plants ; genetics ; RNA, Messenger ; metabolism

Filamentous fungi are one of the platforms for producing fermented products. The specific characteristic of their submerged fermentation is the aggregation of mycelia that is affected by environmental conditions, leading to significantly different rheology for fermentation broth. Such a rheological change not only affects the transfer of mass, heat and momentum, but also the biosynthesis of target products and the efficiency of their production. In this article, strategies for morphological regulation of filamentous fungi are reviewed, and the impact of calcium signal transduction and chitin biosynthesis on apical growth of hyphae and branching of mycelia for their aggregation are further commented.
Fermentation ; Fungi ; physiology ; Hot Temperature ; Mycelium ; metabolism ; Rheology

The progress of Chinese medicine modernization is slow in china, and one of the reason is the dated process method. The fermentation technology of pharmaceutical fungi is more and more perfect. To process Chinese medicine by pharmaceutical fungi could enhance the effective density of active ingredient in Chinese medicine, and the fungi could produce a variety of active secondary metabolite, moreover, some compounds in Chinese medicine could be bio-transformed to produce new compound by pharmaceutical fungi in the fermentation. So process Chinese medicine by pharmaceutical fungi could produce de novo Chinese medicine preparations which include a variety of bioactive compounds, and it is suitable to produce in a large scale and convenient to control the quality. To process Chinese medicine by submerged fermentation of pharmaceutical fungi provides a new process method for Chinese medicine.
Biotransformation ; Drugs, Chinese Herbal ; metabolism ; Fermentation ; Fungi ; metabolism ; Plants, Medicinal ; metabolism ; Quality Control ; Technology, Pharmaceutical ; methods

OBJECTIVETo research the function of endophytes of mistletoe in parasitism process of mistletoe in Pterocarya stenoptera.

METHODEndophytes from eight different parts of the mistletoe were separated by explant culture, and further screened by different CMC plates culture and DNS method to get cellulase high productive strains. The distribution of the endophytic fungus parasitized in mistletoe were prepared and stained to demonstrate by histological section of the intumescentia part of the P. stenoptera.

RESULTThe histological section indicated that aboundent of hyphasma were distributed around the haustorium of the mistletoe. Eighty three strains of endophytic fungus were separated, 38 of them were able to degrade cellulose, 19 strains showed high cellulase activity and 10 of which were separated from the parasitic position.

CONCLUSIONEndophytic fungus of mistletoe can secrete cellulase and assist the haustorium of mistletoe to breakthrough the cell walls as well as intercellular space tissues of the P. stenoptera, thus, the endophytic fungus plays an important role in the parasitism process of mistletoe in P. stenoptera.

Cellulase ; metabolism ; Cellulose ; metabolism ; Fungi ; metabolism ; Juglandaceae ; Symbiosis ; Viscum ; cytology ; microbiology

The present study was conducted to explore the effect of endophytic fungi fraction on growth and anti-oxidative activity of Eleutherococcus senticosus. The growth,yield,contents of MDA,and antioxidant activities were assessed in E. senticosus under five fungi fractions,namely BZ,MH,DT,JS,and XFZ. The results showed that fungi fractions and component significantly affected the growth,low concentration of DT fungi fraction significantly increased the biomass of E. senticosus,reduced the MDA content in cells,and the antioxidant activities of the aqueous extracts were superior to the others. The results indicated that low concentration of DT fungi fraction was the optimum fraction to achieve high yield and quality of E. senticosus.
Antioxidants ; metabolism ; Eleutherococcus ; growth & development ; metabolism ; Fungi ; chemistry ; Malondialdehyde ; metabolism ; Oxidative Stress

Inefficient degradation of lignocellulose is one of the main barriers for the utilization of renewable plant biomass for biofuel production. The bottleneck of the biorefinery process is the generation of fermentable sugars from complicated biomass polymers. In nature, the main microbes of lignocelluloses deconstruction are fungi. Therefore, elucidating the mechanism of lignocelluloses degradation by fungi is of critical importance for the commercialization of lignocellulosic biofuels. This review focuses on the progress in lignocelluloses degradation pathways in fungi, especially on the advances made by functional genomics studies.
Biofuels ; Fungi ; genetics ; metabolism ; Genetic Engineering ; Genome, Fungal ; genetics ; Industrial Microbiology ; Lignin ; metabolism