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Activity of Adesmia boronioides resinous exudate against phytopathogenic bacteria

2019; Taylor & Francis; Volume: 35; Issue: 12 Linguagem: Inglês

10.1080/14786419.2019.1648465

1478-6427

Iván Montenegro, Miryam Valenzuela, Nicolas Zamorano, Rocío Santander, Carolina Baez, Alejandro Madrid,

Phytochemistry and Biological Activities

Resinous exudate obtained from the aerial parts of Adesmia boronioides Hook.f. were evaluated to determine anti-phytopathogenic effects. Briefly, resinous exudate was obtained by dipping fresh plant material in dichloromethane; chemical composition was determined by GC–MS; and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were evaluated against four phytopathogenic bacteria. Resinous exudate yield was 8.5% (resin/fresh plant), of which esquel-6-en-9-one (14.25%), esquel-7-en-9-one (5.86%), and veratric acid (2.59%) were the effective antibacterial compounds. Tested against Pectobacterium carotovorum subsp. carotovora, Erwinia amylovora, Bacillus subtilis, and Pseudomonas syringae, MICs and MBCs ranged from 16 to 128 µg/mL and 32–256 µg/mL, respectively. These results provide initial evidence that resinous bush A. boronioides is a new and alternative source of substances with agricultural interest.