The apocarotenoid metabolite zaxinone regulates growth and strigolactone biosynthesis in rice.

Abstract:

:Carotenoid cleavage dioxygenases (CCDs) form hormones and signaling molecules. Here we show that a member of an overlooked plant CCD subfamily from rice, that we name Zaxinone Synthase (ZAS), can produce zaxinone, a novel apocarotenoid metabolite in vitro. Loss-of-function mutants (zas) contain less zaxinone, exhibit retarded growth and showed elevated levels of strigolactones (SLs), a hormone that determines plant architecture, mediates mycorrhization and facilitates infestation by root parasitic weeds, such as Striga spp. Application of zaxinone can rescue zas phenotypes, decrease SL content and release and promote root growth in wild-type seedlings. In conclusion, we show that zaxinone is a key regulator of rice development and biotic interactions and has potential for increasing crop growth and combating Striga, a severe threat to global food security.

journal_name

Nat Commun

journal_title

Nature communications

authors

Wang JY,Haider I,Jamil M,Fiorilli V,Saito Y,Mi J,Baz L,Kountche BA,Jia KP,Guo X,Balakrishna A,Ntui VO,Reinke B,Volpe V,Gojobori T,Blilou I,Lanfranco L,Bonfante P,Al-Babili S

doi

10.1038/s41467-019-08461-1

subject

Has Abstract

pub_date

2019-02-18 00:00:00

pages

810

issue

1

issn

2041-1723

pii

10.1038/s41467-019-08461-1

journal_volume

10

pub_type

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