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Type: Journal article
Title: Phloem transport of the receptor DWARF14 protein is required for full function of strigolactones
Author: Kameoka, H.
Dun, E.
Lopez-Obando, M.
Brewer, P.
de Saint Germain, A.
Rameau, C.
Beveridge, C.
Kyozuka, J.
Citation: Plant Physiology, 2016; 172(3):1844-1852
Publisher: American Society of Plant Biologists.
Issue Date: 2016
ISSN: 0032-0889
Statement of
Hiromu Kameoka, Elizabeth A. Dun, Mauricio Lopez-Obando, Philip B. Brewer, Alexandre de Saint Germain, Catherine Rameau, Christine A. Beveridge, and Junko Kyozuka
Abstract: The cell-to-cell transport of signaling molecules is essential for multicellular organisms to coordinate the action of their cells. Recent studies identified DWARF14 (D14) as a receptor of strigolactones (SLs), molecules that act as plant hormones and inhibit shoot branching. Here, we demonstrate that RAMOSUS3, a pea ortholog of D14, works as a graft-transmissible signal to suppress shoot branching. In addition, we show that D14 protein is contained in phloem sap and transported through the phloem to axillary buds in rice. SLs are not required for the transport of D14 protein. Disruption of D14 transport weakens the suppression of axillary bud outgrowth of rice. Taken together, we conclude that the D14 protein works as an intercellular signaling molecule to fine-tune SL function. Our findings provide evidence that the intercellular transport of a receptor can regulate the action of plant hormones.
Keywords: Phloem transport
Rights: © 2016 American Society of Plant Biologists. All Rights Reserved.
DOI: 10.1104/pp.16.01212
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Appears in Collections:Agriculture, Food and Wine publications
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