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Trichoderma harzianum MTCC 5179 impacts the population and functional dynamics of microbial community in the rhizosphere of black pepper (Piper nigrum L.).

Authors
  • Umadevi, Palaniyandi1
  • Anandaraj, Muthuswamy2
  • Srivastav, Vivek3
  • Benjamin, Sailas4
  • 1 ICAR-Indian Institute of Spices Research, Kerala, India; University of Calicut, Department of Botan, Biotechnology Division, Kerala, India. , (India)
  • 2 ICAR-Indian Institute of Spices Research, Kerala, India. Electronic address: [email protected] , (India)
  • 3 ICAR-Indian Institute of Spices Research, Kerala, India. , (India)
  • 4 University of Calicut, Department of Botan, Biotechnology Division, Kerala, India. , (India)
Type
Published Article
Journal
Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]
Publication Date
Nov 29, 2017
Identifiers
DOI: 10.1016/j.bjm.2017.05.011
PMID: 29229530
Source
Medline
Keywords
License
Unknown

Abstract

Employing Illumina Hiseq whole genome metagenome sequencing approach, we studied the impact of Trichoderma harzianum on altering the microbial community and its functional dynamics in the rhizhosphere soil of black pepper (Piper nigrum L.). The metagenomic datasets from the rhizosphere with (treatment) and without (control) T. harzianum inoculation were annotated using dual approach, i.e., stand alone and MG-RAST. The probiotic application of T. harzianum in the rhizhosphere soil of black pepper impacted the population dynamics of rhizosphere bacteria, archae, eukaryote as reflected through the selective recruitment of bacteria [Acidobacteriaceae bacterium (p=1.24e-12), Candidatus koribacter versatilis (p=2.66e-10)] and fungi [(Fusarium oxysporum (p=0.013), Talaromyces stipitatus (p=0.219) and Pestalotiopsis fici (p=0.443)] in terms of abundance in population and bacterial chemotaxis (p=0.012), iron metabolism (p=2.97e-5) with the reduction in abundance for pathogenicity islands (p=7.30e-3), phages and prophages (p=7.30e-3) with regard to functional abundance. Interestingly, it was found that the enriched functional metagenomic signatures on phytoremediation such as benzoate transport and degradation (p=2.34e-4), and degradation of heterocyclic aromatic compounds (p=3.59e-13) in the treatment influenced the rhizosphere micro ecosystem favoring growth and health of pepper plant. The population dynamics and functional richness of rhizosphere ecosystem in black pepper influenced by the treatment with T. harzianum provides the ecological importance of T. harzianum in the cultivation of black pepper.

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