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Title

Striga hermonthica MAX2 restores branching but not the Very Low Fluence Response in the Arabidopsis thaliana max2 mutant

AuthorsLiu, Qing; Fernández-Aparicio, Mónica ; Bouwmeester, Harro J.
KeywordsMAX2
Signaling
Striga hermonthica
Strigolactone
Biosynthesis
Issue DateApr-2014
PublisherWiley-Blackwell
CitationNew Phytologist 202(2): 531-541 (2014)
AbstractSummary: Seed germination of Striga spp. (witchweeds), one of the world's most destructive parasitic weeds, cannot be induced by light but is specifically induced by strigolactones. It is not known whether Striga uses the same components for strigolactone signaling as host plants, whether it has endogenous strigolactone biosynthesis and whether there is post-germination strigolactone signaling in Striga. Strigolactones could not be detected in in vitro grown Striga, while for host-grown Striga, the strigolactone profile is dominated by a subset of the strigolactones present in the host. Branching of in vitro grown Striga is affected by strigolactone biosynthesis inhibitors. ShMAX2, the Striga ortholog of Arabidopsis MORE AXILLARY BRANCHING 2 (AtMAX2) - which mediates strigolactone signaling - complements several of the Arabidopsis max2-1 phenotypes, including the root and shoot phenotype, the High Irradiance Response and the response to strigolactones. Seed germination of max2-1 complemented with ShMAX2 showed no complementation of the Very Low Fluence Response phenotype of max2-1. Results provide indirect evidence for ShMAX2 functions in Striga. A putative role of ShMAX2 in strigolactone-dependent seed germination of Striga is discussed. © 2014 New Phytologist Trust.
Publisher version (URL)http://dx.doi.org/10.1111/nph.12692
URIhttp://hdl.handle.net/10261/101241
DOIhttp://dx.doi.org/10.1111/nph.12692
Identifiersdoi: 10.1111/nph.12692
issn: 0028-646X
e-issn: 1469-8137
Appears in Collections:(IAS) Artículos
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