Nematocidni i-kromanski glikozid iz listov rasline Kigelia pinnata

Olubunmi ATOLANI, Oluwatoyin Adenike FABIYI, Gabriel Ademola OLATUNJI

Povzetek


Sintetični nematocidi, kot na primer oxamyl in karbofuran igrajo pomembno vlogo pri zatiranju nematod, ki parazitirajo na rastlinah, zaradi njihovega negativnega vpliva na okolje pa je nujno iskanje varnejših alternativ. Naš prispevek na področju raziskav bioloških nematocidov je poskus osamitve potencialnih nematocidnih substanc rastlinskega izvora. Nov glikozid, izoliran iz listov rastline Kigelia pinnata (Lam.) Benth (Bignoniaceae) smo proeizkusili na nematocidno aktivnost. Strukturo predlagane spojine smo opredelili z različnimi metodami, vključno z UV, FTIR, 1D in 2D-NMR, FAB-MS, TOF-ESI-MS in TOF_ESI_MS/MS (TANDEM). In vitro poskus z glikozidom na jajčecih in juvenilnih osebkih Meloidogyne incognita je nakazal povečano smrtnost. Njegova aktivnost je primerljiva z oxamylom v koncentraciji 0,1 mg/mL. Po štirih urah opazovanja nismo opazili nobenih značilnih razlik med glikozidom in oxamylom. Dosedanji podatki kažejo, da je naravni glikozid obetavna alternativa za oxamyl za kontrolo z nematodami povzročenih koreninskih vozlov in da lahko prispeva k naravnemu načinu zatiranja škodljivcev.

Ključne besede


varstvo rastlin; nematode; Kigelia pinnata; i-kromanski glikozid; nematocidi

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2014.104.1.3

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