title: A study on accumulation of volatile organic compounds during ochratoxin a biosynthesis and characterization of the correlation in Aspergillus carbonarius isolated from grape and dried vine fruit.
abstract: Volatile organic compounds (VOCs) and ochratoxin A (OTA) were detected in Aspergillus carbonarius strains (AF, SD26 and SD27) during a 7-day growing period, using HS-SPME-GC-MS and HPLC-MS/MS, respectively. Results showed that 33 VOCs were detected in these strains. The AF strain showed the different sesquiterpene profile compared with the other strains. Principal component analysis revealed that the AF strain was segregated from the other two strains regarding the VOC profile, especially the sesquiterpene profile. Ester metabolites were produced more at the beginning of the strain growth period, whereas extension of the strain incubation resulted in an intense accumulation of hydrocarbon compounds. The prediction models on the correlation between OTA and VOCs were established using partial least squares regression analysis. This analysis indicated that C-8 alcohols, ketones, and trans-nerolidol showed a close relation with the OTA synthesis.
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China. Electronic address: zxxjoypeace@foxmail.com.
authors.forename: Xiaoxu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China. Electronic address: cz421420@163.com.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China; Supervision, Inspection & Testing Center for Agricultural Products Quality, Ministry of Agriculture, Beijing, China. Electronic address: lyma1203@cau.edu.cn.
authors.forename: Liyan
authors.initials: L
authors.lastname: Ma
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China. Electronic address: lijngming@cau.edu.cn.
authors.forename: Jingming
authors.initials: J
authors.lastname: Li
mesh_terms: D001230:Aspergillus / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D005638:Fruit / Q000737:chemistry / Q000382:microbiology; D009793:Ochratoxins / Q000032:analysis* / Q000378:metabolism; D064210:Secondary Metabolism; D053719:Tandem Mass Spectrometry; D027843:Vitis / Q000737:chemistry / Q000382:microbiology*; D055549:Volatile Organic Compounds / Q000032:analysis / Q000378:metabolism*
chemical_list: D009793:Ochratoxins; D055549:Volatile Organic Compounds; C025589:ochratoxin A
keywords: Aspergillus carbonarius; Ochratoxin A; PCA; PLSR model; Volatile organic compounds