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Detection of changes in mould cell wall stress-related gene expression by a novel reverse transcription real-time PCR method.

Abstract：

:The cell wall integrity (CWI) pathway is activated in response to cell wall stresses due to different food-related environments. Rho1 is one of the main regulators within such pathway. The objective of this work was to design an easy-to-use RT-qPCR technique for the evaluation of the Rho1 gene expression useful to measure responses to the presence of cell wall stressors such as the antifungal protein PgAFP. Two primer pairs were designed from published conserved regions. Their specificity initially was determined by in silico analysis for several fungal species. After optimising the qPCR, the primer pair Rho1-F1/R2 was selected due to the lowest Cq values obtained and its specificity. The qPCR method showed efficiencies between 97.5% and 100.5%. Applicability of the designed qPCR method was evaluated in the presence of the stressor PgAFP. The PgAFP-resistant Penicillium polonicum and the PgAFP-sensitive Aspergillus flavus showed Rho1 gene over- and under- expression, respectively, indicating that the CWI pathway is activated in the former species but not activated in the latter one in response to the stress caused by PgAFP. This novel qPCR methodology able to detect changes in CWI-related gene expression in filamentous fungi will be useful in future studies to evaluate physiological mould responses to different food environmental challenges.

journal_name

Int J Food Microbiol

journal_title

International journal of food microbiology

authors

da Cruz Cabral L,Delgado J,Andrade MJ,Rodríguez M,Rodríguez A

doi

10.1016/j.ijfoodmicro.2018.03.020

subject

Has Abstract

pub_date

2018-06-20 00:00:00

pages

17-23

eissn

0168-1605

issn

1879-3460

pii

S0168-1605(18)30123-5

journal_volume

275

pub_type

杂志文章

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