<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>Paeonia ostii</italic> is known for its excellent medicinal values as Chinese traditional plant. To date, the diversity of culturable endophytes associated with <italic>P. ostii</italic> is in its initial phase of exploration. In this study, 56 endophytic bacteria and 51 endophytic fungi were isolated from <italic>P. ostii</italic> roots in China. Subsequent characterization of 56 bacterial strains by 16S rDNA gene sequence analysis revealed that nine families and 13 different genera were represented. All the fungal strains were classed into six families and 12 genera based on ITS gene sequence. The biosynthetic potential of all the endophytes was further investigated by the detection of putative polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) genes. The PCR screens were successful in targeting thirteen bacterial PKS, five bacterial NRPS, ten fungal PKS and nine fungal NRPS gene fragments. Bioinformatic analysis of these detected endophyte gene fragments facilitated inference of the potential bioactivity of endophyte bioactive products, suggesting that the isolated endophytes are capable of producing a plethora of secondary metabolites. These results suggest that endophytes isolated from <italic>P. ostii</italic> had abundant population diversity and biosynthetic potential, which further proved that endophytes are valuable reservoirs of novel bioactive compounds.</p></abstract>

Paeonia ostii is known for its excellent medicinal values as Chinese traditional plant. To date, the diversity of culturable endophytes associated with P. ostii is in its initial phase of exploration. In this study, 56 endophytic bacteria and 51 endophytic fungi were isolated from P. ostii roots in China. Subsequent characterization of 56 bacterial strains by 16S rDNA gene sequence analysis revealed that nine families and 13 different genera were represented. All the fungal strains were classed into six families and 12 genera based on ITS gene sequence. The biosynthetic potential of all the endophytes was further investigated by the detection of putative polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) genes. The PCR screens were successful in targeting thirteen bacterial PKS, five bacterial NRPS, ten fungal PKS and nine fungal NRPS gene fragments. Bioinformatic analysis of these detected endophyte gene fragments facilitated inference of the potential bioactivity of endophyte bioactive products, suggesting that the isolated endophytes are capable of producing a plethora of secondary metabolites. These results suggest that endophytes isolated from P. ostii had abundant population diversity and biosynthetic potential, which further proved that endophytes are valuable reservoirs of novel bioactive compounds.

Culturable Endophytes Diversity Isolated from <italic>Paeonia ostii</italic> and the Genetic Basis for Their Bioactivity

Polish Journal of Microbiology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Culturable Endophytes Diversity Isolated from  and the Genetic Basis for Their Bioactivity

Paeonia ostii is known for its excellent medicinal values as Chinese traditional plant. To date, the diversity of culturable endophytes associated with P....

Culturable Endophytes Diversity Isolated from Paeonia ostii and the Genetic Basis for Their Bioactivity

Article Category: original-paper

Publié en ligne: 10 déc. 2018

Pages: 441 - 454

Reçu: 26 mars 2018

Accepté: 15 juil. 2018

DOI: https://doi.org/10.21307/pjm-2018-052

Mots clés
endophytes, diversity, polyketide synthase, nonribosomal peptide synthetase

© 2018 Rui-xian Yang et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Culturable Endophytes Diversity Isolated from Paeonia ostii and the Genetic Basis for Their Bioactivity

Article Category: original-paper

Publié en ligne: 10 déc. 2018

Pages: 441 - 454

Reçu: 26 mars 2018

Accepté: 15 juil. 2018

DOI: https://doi.org/10.21307/pjm-2018-052

Mots clésendophytes, diversity, polyketide synthase, nonribosomal peptide synthetase

© 2018 Rui-xian Yang et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
endophytes, diversity, polyketide synthase, nonribosomal peptide synthetase