Early warning of Diaporthe infection in kiwifruit soft rot by plasmonic dimer-enhanced Raman spectroscopy

Ting Yu; Huanhuan Li; Baomei Zhou; Kui Liu; Hao Jiang; Min Xu; Mengke Su; Yongsheng Liu; Min Miao; Honglin Liu

doi:10.1016/j.isci.2022.105650

Early warning of Diaporthe infection in kiwifruit soft rot by plasmonic dimer-enhanced Raman spectroscopy

iScience. 2022 Nov 22;25(12):105650. doi: 10.1016/j.isci.2022.105650. eCollection 2022 Dec 22.

Authors

Ting Yu¹, Huanhuan Li², Baomei Zhou¹, Kui Liu¹, Hao Jiang¹, Min Xu¹, Mengke Su^{1

3}, Yongsheng Liu³, Min Miao¹, Honglin Liu¹

Affiliations

¹ China Light Industry Key Laboratory of Meat Microbial Control and Utilization, School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P.R. China.
² School of Biological Science and Engineering, North Minzu University, Yinchuan 750021, P.R. China.
³ State Key Laboratory of Tea Plant Biology and Utilization, School of Horticulture, Anhui Agricultural University, Hefei 230036, P.R. China.

Abstract

Diaporthe genus is the dominant pathogens of kiwifruit soft rot with long incubation period and rapid onset and very hard to detect in advance. It is of great significance to develop point-of-care tests for disease prevention and field management. Here we screen a pair of genus-level primers for constructing plasmonic dimer Rayleigh/Raman spectroscopy, which enables rapid, specific, and sensitive detection of Diaporthe genus in real kiwifruits. Dark-filed Rayleigh scattering clearly visualizes the target-induced dimer assembly of nanoprobes. Plasmonic dimer-enhanced Raman spectroscopy has high specificity for 12 common isolates of Diaporthe genus in one batch samples with highly accurate results and much higher sensitivity than polymerase chain reaction (PCR). It realizes the recognition of Diaporthe infection at an early stage of 24 h when the kiwifruits do not have any noticeable symptoms. It demonstrates a bright prospect of point-of-care tests for early warning of kiwifruit soft rot infection and quality control.

Keywords: Molecular plant pathology; Plant biotechnology; Plant pathology.