Lopez Obando, Mauricio
- National Institute of Agricultural Research (INRA)
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.
Published in
Plant Physiology
2016, volume: 172, number: 3, pages: 1844-1852
SLU Authors
UKÄ Subject classification
Developmental Biology
Cell Biology
Publication identifier
- DOI: https://doi.org/10.1104/pp.16.01212
Permanent link to this page (URI)
https://res.slu.se/id/publ/84593