| Title: | Spotting of Volatile Signatures through GC-MS Analysis of Bacterial and Fungal Infections in Stored Potatoes (Solanum tuberosum L.) |
| Author(s): | Kate A; Tiwari S; Gujar JP; Modhera B; Tripathi MK; Ray H; Ghosh A; Mohapatra D; |
| Address: | "ICAR-Central Institute of Agricultural Engineering, Nabibagh, Berasia Road, Bhopal 462038, India. Maulana Azad National Institute of Technology, Bhopal 462003, India. Center for Development of Advanced Computing, Kolkata 700091, India" |
| ISSN/ISBN: | 2304-8158 (Print) 2304-8158 (Electronic) 2304-8158 (Linking) |
| Abstract: | "Potatoes inoculated with Pectobacterium carotovorum spp., Aspergillus flavus and Aspergillus niger, along with healthy (control) samples, were stored at different storage temperatures (4 +/- 1 degrees C, 8 +/- 1 degrees C, 25 +/- 1 degrees C) for three weeks. Volatile organic compounds (VOCs) were mapped using the headspace gas analysis through solid phase micro extraction-gas chromatography-mass spectroscopy every week. The VOC data were arranged into different groups and classified using principal component analysis (PCA) and partial least square discriminant analysis (PLS-DA) models. Based on a variable importance in projection (VIP) score > 2 and the heat map, prominent VOCs were identified as 1-butanol and 1-hexanol, which can act as biomarkers for Pectobacter related bacterial spoilage during storage of potatoes in different conditions. Meanwhile, hexadecanoic acid and acetic acid were signature VOCs for A. flavus, and hexadecane, undecane, tetracosane, octadecanoic acid, tridecene and undecene were associated with A. niger. The PLS-DA model performed better at classifying the VOCs of the three different species of infection and the control sample compared to PCA, with high values of R(2) (96-99%) and Q(2) (0.18-0.65). The model was also found to be reliable for predictability during random permutation test-based validation. This approach can be adopted for fast and accurate diagnosis of pathogenic invasion of potatoes during storage" |
| Keywords: | Aspergillus infection VOC classification multi-variate data analysis pectobacter infection potato storage; |
| Notes: | "PubMed-not-MEDLINEKate, Adinath Tiwari, Shikha Gujar, Jamna Prasad Modhera, Bharat Tripathi, Manoj Kumar Ray, Hena Ghosh, Alokesh Mohapatra, Debabandya eng NASF/Minimization-6033/2018-19/National Agricultural Science Fund/ Switzerland 2023/05/27 Foods. 2023 May 22; 12(10):2083. doi: 10.3390/foods12102083" |
