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Simplified strigolactams as potent analogues of strigolactones for the seed germination induction of Orobanche cumana Wallr.
Author(s) -
Lumbroso Alexandre,
VilledieuPercheron Emmanuelle,
Zurwerra Didier,
Screpanti Claudio,
Lachia Mathilde,
Dakas PierreYves,
Castelli Laure,
Paul Verity,
Wolf Hanno Christian,
Sayer Danielle,
Beck Andreas,
Rendine Stefano,
FonnéPfister Raymonde,
De Mesmaeker Alain
Publication year - 2016
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.4268
Subject(s) - orobanche , strigolactone , germination , weed , rhizosphere , biology , sunflower , shoot , striga , helianthus annuus , parasitic plant , allelopathy , agronomy , botany , ambrosia artemisiifolia , host (biology) , bacteria , ecology , biochemistry , genetics , arabidopsis , gene , mutant , allergy , ragweed , immunology
BACKGROUND Strigolactones play an important role in the rhizosphere as signalling molecules stimulating the seed germination of parasitic weed seeds and hyphal branching of arbuscular micorrhiza, and also act as hormones in plant roots and shoots. Strigolactone derivatives, e.g. strigolactams, could be used as suicidal germination inducers in the absence of a host crop for the decontamination of land infested with parasitic weed seeds. RESULTS We report the stereoselective synthesis of novel strigolactams, together with some of their critical physicochemical properties, such as water solubility, hydrolytic stability, as well as their short soil persistence. In addition, we show that such strigolactams are potent germination stimulants of O. cumana parasitic weed seeds and do not affect the seed germination and the root growth of sunflower. CONCLUSIONS The novel strigolactam derivatives described here compare favourably with the corresponding GR ‐28 strigolactones in terms of biological activity and physicochemical properties. However, we believe strigolactone and strigolactam derivatives require further structural optimisation to improve their soil persistence to demonstrate a potential for agronomical applications. © 2016 Society of Chemical Industry