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Diversity of bacterial endophytes in roots of Mexican husk tomato plants (Physalis ixocarpa) and their detection in the rhizosphere.

Authors
  • Marquez-Santacruz, H A
  • Hernandez-Leon, R
  • Orozco-Mosqueda, M C
  • Velazquez-Sepulveda, I
  • Santoyo, G
Type
Published Article
Journal
Genetics and Molecular Research
Publisher
Genetics and Molecular Research
Publication Date
Jan 01, 2010
Volume
9
Issue
4
Pages
2372–2380
Identifiers
DOI: 10.4238/vol9-4gmr921
PMID: 21157706
Source
Medline
License
Unknown

Abstract

Endophytic bacterial diversity was estimated in Mexican husk tomato plant roots by amplified rDNA restriction analysis and sequence homology comparison of the 16S rDNA genes. Sixteen operational taxonomic units from the 16S rDNA root library were identified based on sequence analysis, including the classes Gammaproteobacteria, Betaproteobacteria, Actinobacteria, and Bacilli. The predominant genera were Stenotrophomonas (21.9%), Microbacterium (17.1%), Burkholderia (14.3%), Bacillus (14.3%), and Pseudomonas (10.5%). In a 16S rDNA gene library of the same plant species' rhizosphere, only common soil bacteria, including Stenotrophomonas, Burkholderia, Bacillus, and Pseudomonas, were detected. We suggest that the endophytic bacterial diversity within the roots of Mexican husk tomato plants is a subset of the rhizosphere bacterial population, dominated by a few genera.

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