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Parasitic weed management by using strigolactone‐degrading fungi
Author(s) -
Boari Angela,
Ciasca Biancamaria,
PinedaMartos Rocío,
Lattanzio Veronica MT,
Yoneyama Koichi,
Vurro Maurizio
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.4226
Subject(s) - strigolactone , trichoderma harzianum , botrytis cinerea , fusarium oxysporum , germination , biology , botany , fungus , botrytis , weed , orobanche , trichoderma , fungicide , biological pest control , horticulture , biochemistry , arabidopsis , gene , mutant
Abstract BACKGROUND Seed germination is a key phase of the parasitic plant life cycle that is stimulated by the secondary metabolites, mainly strigolactones ( SLs ), secreted by the host roots. Interventions during this stage would be particularly suitable for parasitic weed management practices, as blocking these chemical signals would prevent seed germination and thus parasite attack. Four fungal strains with different ecological functions were considered for their possible ability to metabolise SLs : Fusarium oxysporum and F. solani , biocontrol agents of Phelipanche ramosa ; Trichoderma harzianum , a potential biopesticide; Botrytis cinerea , a phytopathogenic fungus. Four different SLs [the natural strigol, 5‐deoxystrigol ( 5DS ) and 4‐deoxyorobanchol ( 4DO ), and the synthetic analogue GR24 ] were added to fungal cultures, followed by determination of the SL content by liquid chromatography–tandem mass spectrometry. RESULTS Differences were observed among microorganisms, treatments and SLs used. T. harzianum and F. oxysporum were the most capable of reducing the SL content; considering the whole set of fungi used, 5DS and 4DO proved to be the most degradable SLs . CONCLUSIONS Beneficial microscopic fungi could differently be used for biocontrolling parasitic weeds, acting as a ‘physiological’ barrier, by preventing the germination of their seeds through the ability to biotransform the stimulatory signals. © 2016 Society of Chemical Industry