Role of Strigolactones in Root Development and Communication

Authored by: Hinanit Koltai

Plant Roots

Print publication date:  April  2013
Online publication date:  April  2013

Print ISBN: 9781439846483
eBook ISBN: 9781439846490
Adobe ISBN:

10.1201/b14550-22

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Abstract

Strigolactones (SLs) are carotenoid-derived terpenoid lactones (Matusova et al. 2005). They were identified 40 years ago as germination stimulants for the parasitic plants Striga and Orobanche (e.g., Cook et al. 1966, 1972; Yokota et al. 1998; Matusova et al. 2005; Akiyama and Hayashi 2006; Xie et al. 2007, 2008a,b, 2009; Goldwasser et al. 2008; Gomez-Roldan et al. 2008; recently reviewed by Xie et al. 2010) and later, as stimulants of hyphal branching of the symbiotic arbuscular mycorrhizal fungi (AMF; reviewed by Xie et al. 2010). More recently, SLs have been found to act as long-distance branching factors that suppress growth of preformed axillary buds (Gomez-Roldan et al. 2008; Umehara et al. 2008). Thus, they fit the characteristics of a novel branch-inhibiting signal acting as a long-distance signal transmitter (e.g., Gomez-Roldan et al. 2008; Umehara et al. 2008; Brewer et al. 2009; Ferguson and Beveridge 2009; reviewed by Dun et al. 2009). SLs or their derivatives have therefore been defined as a new group of plant hormones.

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