Soni, P and Pandey, A K and Nayak, S N and Pandey, M K and Tolani, P and Pandey, S and Sudini, H K and Bajaj, P and Fountain, J C and Singam, P and Guo, B and Varshney, R K (2021) Global Transcriptome Profiling Identified Transcription Factors, Biological Process, and Associated Pathways for Pre-Harvest Aflatoxin Contamination in Groundnut. Journal of Fungi (TSI), 7 (6). pp. 1-18. ISSN 2309-608X
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Abstract
Pre-harvest aflatoxin contamination (PAC) in groundnut is a serious quality concern globally, and drought stress before harvest further exacerbate its intensity, leading to the deterioration of produce quality. Understanding the host–pathogen interaction and identifying the candidate genes responsible for resistance to PAC will provide insights into the defense mechanism of the groundnut. In this context, about 971.63 million reads have been generated from 16 RNA samples under controlled and Aspergillus flavus infected conditions, from one susceptible and seven resistant genotypes. The RNA-seq analysis identified 45,336 genome-wide transcripts under control and infected conditions. This study identified 57 transcription factor (TF) families with major contributions from 6570 genes coding for bHLH (719), MYB-related (479), NAC (437), FAR1 family protein (320), and a few other families. In the host (groundnut), defense-related genes such as senescenceassociated proteins, resveratrol synthase, seed linoleate, pathogenesis-related proteins, peroxidases, glutathione-S-transferases, chalcone synthase, ABA-responsive gene, and chitinases were found to be differentially expressed among resistant genotypes as compared to susceptible genotypes. This study also indicated the vital role of ABA-responsive ABR17, which co-regulates the genes of ABA responsive elements during drought stress, while providing resistance against A. flavus infection. It belongs to the PR-10 class and is also present in several plant–pathogen interactions.
| Item Type: | Article |
|---|---|
| Divisions: | Global Research Program - Accelerated Crop Improvement Research Program : Asia |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Aflatoxin, Aspergillus flavus, Biotechnology, Food safety, Gene expression, Genomics, Pre-harvest aflatoxin ontamination (PAC); RNA-seq; transcriptome analysis |
| Subjects: | Others > Biotechnology Mandate crops > Groundnut Others > Genetics and Genomics Others > Food Security Others > Aflatoxins |
| Depositing User: | Mr Arun S |
| Date Deposited: | 19 Aug 2021 09:14 |
| Last Modified: | 19 Aug 2021 09:14 |
| URI: | http://oar.icrisat.org/id/eprint/11875 |
| Official URL: | https://doi.org/10.3390/jof7060413 |
| Projects: | UNSPECIFIED |
| Funders: | MARS-Wrigley, the USA, CGIAR-Natural Science Foundation of China (NSFC), China, Bill & Melinda Gates Foundation |
| Acknowledgement: | We thank Ashwin Jayale and U. Naga Mangala for the technical support given during glass house experiments and aflatoxin estimation. |
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