pcaH, a molecular marker for estimating the diversity of the protocatechuate-degrading bacterial community in the soil environment

Najoi El Azhari

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Microorganisms degrading phenolic compounds play an important role in soil carbon cycling as well as in pesticide degradation. The pcaH gene encoding a key ring-cleaving enzyme of the β-ketoadipate pathway was selected as a functional marker. Using a degenerate primer pair, pcaH fragments were cloned from two agricultural soils. Restriction fragment length polymorphism (RFLP) screening of 150 pcaH clones yielded 68 RFLP families. Comparison of 86 deduced amino acid sequences displayed 70% identity to known PcaH sequences. Phylogenetic analysis results in two major groups mainly related to PcaH sequences from Actinobacteria and Proteobacteria phyla. This confirms that the developed primer pair targets a wide diversity of pcaH sequences, thereby constituting a suitable molecular marker to estimate the response of the pca community to agricultural practices.
Original languageEnglish
JournalPest Management Science
Volume63
Pages (from-to)459-467
ISSN1526-498X
DOIs
Publication statusPublished - 2007

Keywords

  • protocatechuate 3,4-dioxygenase
  • bacterial community
  • soil DNA

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