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J Basic Microbiol

Title:		Changes of volatile organic compounds and bioactivity of Alternaria brassicae GL07 in different ages
Author(s):		Pan Y; Jin H; Yang S; Liu H;
Address:		"College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, PR China. College of Life Science, Shihezi University, Shihezi, PR China"
Journal Title:		J Basic Microbiol
Year:		2019
Volume:		20190506
Issue:		7
Page Number:		713 - 722
DOI:		10.1002/jobm.201800729
ISSN/ISBN:		1521-4028 (Electronic) 0233-111X (Linking)
Abstract:		"Plant endophytes are rich in secondary metabolites and are widely used in medicine, chemical, food, agriculture, and other fields. Here, an endophytic fungus is isolated from Ginkgo biloba L. leaves and identified as Alternaria brassicae GL07 through genotypic characterizations. It can produce fruity scented volatiles. The analysis of volatile organic compounds (VOCs) was done by gas chromatography-mass spectrometry. A total of 32 components were identified; and at different culture times, the composition of VOCs was different. It had more components in the first two weeks, but a fewer components on the 21st day. More olefins, ketone, aldehyde, and alcohol were found in the growth period and more amines and esters were found in the decline period. Also, 2,5-dihydroxyacetophenone, beta-ionone, and nonanal were found. They were the same ingredients in Ginkgo essential oils and some of them were isolated for the first time in the volatile constituents of endophytes. The antioxidant activity and whitening activities of all extracts were also evaluated. When cultured for 10 days, it had the strongest 2,2-diphenyl-2-picrylhydrazyl radical (IC(50) , 0.56 g/L), hydroxyl radical scavenging ability (IC(50) , 0.47 g/L), reducing ability, and tyrosinase inhibition ability (IC(50) , 5.18 g/L), which may be due to a large amount of ketones and alcohols produced during the log phase. This demonstrates the potential of A. brassicae GL07 to produce bioactive compounds and to be used for perfume and cosmetic industries"
Keywords:		Alternaria/*chemistry/classification/genetics/*growth & development Antioxidants/*metabolism Endophytes/chemistry/classification/genetics/growth & development Ginkgo biloba/microbiology Oxidation-Reduction Phylogeny Plant Extracts/chemistry Plant Leaves/m;
Notes:		"MedlinePan, Yun Jin, Hongjie Yang, Shengli Liu, Hong eng 2015A22163/Science and Technology Department of Zhejiang Province/ Germany 2019/04/18 J Basic Microbiol. 2019 Jul; 59(7):713-722. doi: 10.1002/jobm.201800729. Epub 2019 May 6"