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Bacillus licheniformis strain POT1 mediated polyphenol biosynthetic pathways genes activation and systemic resistance in potato plants against Alfalfa mosaic virus
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Bacillus licheniformis strain POT1 mediated polyphenol biosynthetic pathways genes activation and systemic resistance in potato plants against Alfalfa mosaic virus
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Journal Article
Bacillus licheniformis strain POT1 mediated polyphenol biosynthetic pathways genes activation and systemic resistance in potato plants against Alfalfa mosaic virus
2020
Overview
Alfalfa mosaic virus (AMV) is a worldwide distributed virus that has a very wide host range and causes significant crop losses of many economically important crops, including potato (
Solanum tuberosum
L.). In this study, the antiviral activity of
Bacillus licheniformis
strain POT1 against AMV on potato plants was evaluated. The dual foliar application of culture filtrate (CF), 24 h before and after AMV-inoculation, was the most effective treatment that showed 86.79% reduction of the viral accumulation level and improvement of different growth parameters. Moreover, HPLC analysis showed that a 20 polyphenolic compound was accumulated with a total amount of 7,218.86 and 1606.49 mg/kg in POT1-treated and non-treated plants, respectively. Additionally, the transcriptional analysis of thirteen genes controlling the phenylpropanoid, chlorogenic acid and flavonoid biosynthetic pathways revealed that most of the studied genes were induced after POT1 treatments. The stronger expression level of
F3H
, the key enzyme in flavonoid biosynthesis in plants, (588.133-fold) and
AN2
, anthocyanin 2 transcription factor, (97.005-fold) suggested that the accumulation flavonoid, especially anthocyanin, might play significant roles in plant defense against viral infection. Gas chromatography-mass spectrometry (GC-MS) analysis showed that pyrrolo[1,2-a]pyrazine-1,4-dione is the major compound in CF ethyl acetate extract, that is suggesting it acts as elicitor molecules for induction of systemic acquired resistance in potato plants. To our knowledge, this is the first study of biological control of AMV mediated by PGPR in potato plants.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Alfalfa
/ Alfalfa mosaic virus - pathogenicity
/ Bacillus licheniformis - genetics
/ Biosynthetic Pathways - genetics
/ Biosynthetic Pathways - physiology
/ Chlorogenic Acid - metabolism
/ Filtrate
/ Gene Expression Regulation, Plant - genetics
/ High-performance liquid chromatography
/ Humanities and Social Sciences
/ Potatoes
/ Pyrazine
/ Science
/ Solanum tuberosum - microbiology
/ Solanum tuberosum - virology
