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Soyasapogenol B and trans ‐22‐dehydrocam‐ pesterol from common vetch ( Vicia sativa L.) root exudates stimulate broomrape seed germination
Author(s) -
Evidente Antonio,
Cimmino Alessio,
FernándezAparicio Mónica,
Rubiales Diego,
Andolfi Anna,
Melck Dominique
Publication year - 2011
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.2153
Subject(s) - vicia sativa , germination , biology , orobanche , vicia , botany , vicia faba , agronomy
BACKGROUND: Orobanche and Phelipanche species (the broomrapes) are root parasitic plants, some of which represent serious weed problems causing severe yield losses on important crops. Control strategies have largely focused on agronomic practices, resistant crop varieties and herbicides, albeit with marginal success. An alternative control method is the induction of suicidal seed germination with natural substances isolated from root exudates of host and non‐host plants. RESULTS: Soyasapogenol B [olean‐12‐ene‐3,22,24‐triol(3β,4β,22β)] and trans ‐22‐dehydrocampesterol [(ergosta‐5,22‐dien‐3‐ol, (3β,22 E ,24 S )] were isolated from Vicia sativa root exudates. They were identified by comparing their spectroscopic and optical properties with those reported in the literature. Soyasapogenol B was very specific, stimulating the germination of O. minor seeds only, whereas trans ‐22‐dehydrocampesterol stimulated P. aegyptiaca, O. crenata, O. foetida and O. minor . CONCLUSION: Soyasapogenol B and trans ‐22‐deydrocampesterol were isolated for the first time from Vicia sativa root exudates, and their biological activity as stimulants of Orobanche or Phelipanche sp. seed germination was reported. Copyright © 2011 Society of Chemical Industry