Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 59, Issue 19, Pages 10485-10490Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf2024193
Keywords
Striga gesnerioides; Vigna unguiculata; ent-2 '-epi-orobanchol; ent-2 '-epi-orobanchyl acetate; Trifolium pratense; strigolactone
Funding
- Japan Society for the Promotion of Science and JST/JICA
- Science and Technology Research Partnership for Sustainable Development (SATREPS)
- Grants-in-Aid for Scientific Research [23405023, 23580149, 22580119] Funding Source: KAKEN
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Striga gesnerioides is a root parasitic weed of economic significance to cowpea ( Vigna unguiculata) crops in Western Africa. Seeds of the parasite germinate in response to cowpea root exudates. Germination stimulants for the seeds were isolated from the hydroponic culture filtrate of cowpea, and their structures were unambiguously determined as (-)-(3aR,412,8bR,2'R)-ent-2'-epi-orobanchol and (+)-(3aR,4R,8bR,2'R)-ent-2'-epi-orobanchyl acetate, on the basis of mass, CD, and (1)H NMR spectra; optical rotatory power; and chromatographic behavior on HPLC. The alcohol was first isolated and identified from the cowpea root exudates, and the acetate maybe the same compound that had been previously isolated from the exudates and designated as alectrol. Identity of the stimulants produced by cowpea to those produced by red clover (Trifolium pratense) was confirmed.
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