Anti-Rice Pathogenic Microbial Activity of Persicaria sp. Extracts

Authors

  • Pragatsawat Chanprapai Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
  • Isao Kubo Department of Environmental Science, University of California, Berkley, CA 94720-3112, USA
  • Warinthorn Chavasiri Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

Keywords:

Antimicrobial activity, Essential oil, Persicaria sp., Rice pathogens, Structure activity relationship

Abstract

The dichloromethane and methanol extracts, and the essential oil of Persicaria sp. were subjected to in vitro anti-rice pathogenic microbial activity tests. The essential oil displayed the most potential antimicrobial activity. GC-MS analysis revealed thirteen main compounds as dodecanal (54%), decanal (15%), trans-caryophyllene (8%), cyclododecane (7%) and α-humulene (5%). Strong antimicrobial activities of the oil and dodecanal were found against Rhizoctonia solani (IC50 of 0.066 and 0.851 mg/mL) and Xanthomonas oryzae pv. oryzicola (MIC/MBC of 0.78/12.50 and 0.78/25.00 mg/mL), and potent activities against Bipolaris oryzae (IC50 of 3.047 and 3.341 mg/mL) and X. oryzae pv. oryzae (MIC/MBC of 3.12/12.50 and 3.12/25.00 mg/mL). In terms of structure-activity relationship, 2-dodecanone and 2-dodecanol displayed significantly anti-fungal activity, while 1- and 2-dodecanols expressed potent anti-bacterial activity. The essential oil might be used for new microcides controlling rice pathogenic bacteria and fungi.

Downloads

Published

2018-12-18

How to Cite

Chanprapai, P., Kubo, I., & Chavasiri, W. (2018). Anti-Rice Pathogenic Microbial Activity of Persicaria sp. Extracts. Science & Technology Asia, 23(4), 32–41. Retrieved from https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/160803

Issue

Section

Biological sciences