Potential volatile markers of brown rice infested by the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Xuemei Tian; Fenghua Wu; Guoxin Zhou; Jian Guo; Xingquan Liu; Tao Zhang

doi:10.1016/j.fochx.2022.100540

Potential volatile markers of brown rice infested by the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Food Chem X. 2022 Dec 6:17:100540. doi: 10.1016/j.fochx.2022.100540. eCollection 2023 Mar 30.

Authors

Xuemei Tian^{1

2}, Fenghua Wu¹, Guoxin Zhou¹, Jian Guo¹, Xingquan Liu¹, Tao Zhang^{1

2}

Affiliations

¹ College of Food and Health, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China.
² Academy of National Food and Strategic Reserves Administration, Beijing 100037, China.

Abstract

The rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae) could cause significant grain loss by feeding internally on seeds. In this study, we tried to analyze the volatile compounds in non-infested and S. oryzae-infested brown rice during different storage periods to identify potential markers in S. oryzae-infested brown rice and facilitate pest monitoring during brown rice storage. Headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS) and headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) were used to identify the volatile compounds. On the basis of GC-MS and GC-IMS data, a reliable method to distinguish between non-infested and S. oryzae-infested brown rice was discovered using partial least squares-discriminant analysis (PLS-DA). 1-Octen-3-ol, 1-hexanol and 3-octanone were co-selected as potential markers because their variable importance in projection (VIP) was greater than 1 in both models. The current study's findings lay a foundation for further research on the brown rice infestation mechanism and safe storage monitoring.

Keywords: 1-Hexanol (PubChem CID: 8103); 1-Octen-3-ol (PubChem CID: 18827); 2-Propenenitrile (PubChem CID: 7855); 3-Octanone (PubChem CID: 246728); Allyl cyanide (PubChem CID: 8009); Ammonia (PubChem CID: 222); Brown rice; HS-GC-IMS; HS-SPME-GC–MS; Methylpropanal (PubChem CID: 6561); Sitophilus oryzae; Trimethylamine (PubChem CID: 1146); Volatile compounds.