Soyasapogenol B and trans-22-dehydrocampesterol from common vetch (Vicia sativa L.) root exudates stimulate broomrape seed germination

作者：Evidente Antonio^*; Cimmino Alessio; Fernandez Aparicio Monica; Rubiales Diego; Andolfi Anna; Melck Dominique

来源：Pest Management Science, 2011, 67(8): 1015-1022.

DOI：10.1002/ps.2153

• parasitic weeds
• Orobanche
• Phelipanche
• seed germination
• Vicia sativa root exudates
• soyasapogenol B
• 22-dehydrocampesterol

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(3 beta,4 beta,22 beta)] and trans-22-dehydrocampesterol [(ergosta-5,22-dien-3-ol, (3 beta,22E,24S)] 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.

• 出版日期2011-8
• 单位美国弗吉尼亚理工大学(Virginia Tech)