Strigolactones Are Involved in Root Response to Low Phosphate Conditions in Arabidopsis

• DOI: 10.1104/pp.112.202358
• Publication Date: 2012-09-12T05:31:38Z
• Authors: Einav Mayzlish-Gati; Carolien De-Cuyper; Sofie Goormachtig; Tom Beeckman; Marnik Vuylsteke; Philip B. Brewer; Christine A. Beve...; Uri Yermiyahu; Yulia Kaplan; Yael Enzer; Smadar Wininger; Natalie Resnick; Maja Cohen; Yoram Kapulnik; Hinanit Koltai
• Keywords: Root (linguistics)

Strigolactones (SLs) are plant hormones that suppress lateral shoot branching, and act to regulate root hair elongation formation. Here, we show SLs regulators of perception or response low inorganic phosphate (Pi) conditions. This regulation is mediated by MORE AXILLARY GROWTH2 (MAX2) correlated with transcriptional induction the auxin receptor TRANSPORT INHIBITOR RESPONSE1 (TIR1). Mutants SL signaling (max2-1) biosynthesis (max4-1) showed reduced Pi conditions relative wild type. In max4-1, but not max2-1, reduction in was compensated application a synthetic strigolactone GR24. Moreover, AbamineSG, which decreases levels plants, type, SL-signaling mutants. accordance max2-1 several phosphate-starvation phosphate-transporter genes displayed even though content type were similar. Auxin, ethylene, sufficient compensate for expression level TIR1 induced under max2-1. Accordingly, tir1-1 mutant transient density comparison Therefore, suggest plants regulated SLs; this transmitted via MAX2 component receptor.