Striga hermonthica MAX2 restores branching but not the Very Low Fluence Response in the Arabidopsis thaliana max2 mutant. Issue 2 (31st January 2014)

• Record Type: Journal Article
• Authors: Liu, Qing; Zhang, Yanxia; Matusova, Radoslava; Charnikhova, Tatsiana; Amini, Maryam; Jamil, Muhammad; Fernandez‐Aparicio, Monica; Huang, Kan; Timko, Michael P.; Westwood, James H.; Ruyter‐Spira, Carolien; van der, Sander; Bouwmeester, Harro J.
• Is Part Of: New phytologist. Volume 202:Issue 2(2014)
• Page Start: 531
• Page End: 541
• Publication Date: 2014-01-31
• Subjects: Botany -- Periodicals; 580
• DOI: 10.1111/nph.12692
• Languages: English
• ISSNs: 0028-646X

Abstract

<abstract abstract-type="main" id="nph12692-abs-0001"> <title>Summary</title> <p> <list id="nph12692-list-0001" list-type="bullet"> <list-item> <p>Seed germination of <italic>Striga</italic> 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 <italic>Striga</italic> 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 <italic>Striga</italic>.</p> </list-item> <list-item> <p>Strigolactones could not be detected in <italic>in vitro</italic> grown <italic>Striga</italic>, while for host‐grown <italic>Striga</italic>, the strigolactone profile is dominated by a subset of the strigolactones present in the host.</p> </list-item> <list-item> <p>Branching of <italic>in vitro</italic> grown <italic>Striga</italic> is affected by strigolactone biosynthesis inhibitors. <italic>ShMAX2</italic>, the <italic>Striga</italic> ortholog of <italic>Arabidopsis MORE AXILLARY BRANCHING 2</italic> (<italic>AtMAX2</italic>) – which mediates strigolactone signaling – complements several of the <italic>Arabidopsis max2‐1</italic> phenotypes, including the root and shoot phenotype, the High Irradiance Response and the response to strigolactones. Seed germination of <italic>max2‐1</italic> complemented with <italic>ShMAX2</italic> showed no complementation of the Very Low Fluence Response phenotype of <italic>max2‐1</italic>.</p> </list-item> <list-item> <p>Results provide indirect evidence for <italic>ShMAX2</italic> functions in <italic>Striga</italic>. A putative role of <italic>ShMAX2</italic> in strigolactone‐dependent seed germination of <italic>Striga</italic> is discussed.</p> </list-item> </list> </p> </abstract>