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The role of ABCG-type ABC transporters in phytohormone transport.

Type of publication Peer-reviewed
Publikationsform Review article (peer-reviewed)
Publication date 2015
Author Borghi Lorenzo, Kang Joohyun, Ko Donghwi, Lee Youngsook, Martinoia Enrico,
Project Investigation of phytohormone transport and the fate of hypodermal passage cells, a cell type specialized to release strigolactones
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Review article (peer-reviewed)

Journal Biochem. Soc. Trans
Volume (Issue) 43
Page(s) 924 - 930
Title of proceedings Biochem. Soc. Trans
DOI 10.1042/BST20150106


Plant hormones (phytohormones) integrate endogenous and exogenous signals thus synchronizing plant growth with environmental and developmental changes. Similar to animals, phytohormones have distinct source and target tissues, hence controlled transport and focused targeting are required for their functions. Many evidences accumulated in the last years about the regulation of long-distance and directional transport of phytohormones. ATP-binding cassette (ABC) transporters turned out to play major roles in routing phytohormones not only in the plant body but also towards the outer environment. The ABCG-type proteins ABCG25 and ABCG40 are high affinity abscisic acid (ABA) transporters. ABCG14 is highly co-expressed with cytokinin biosynthesis and is the major root-to-shoot cytokinin transporter. Pleiotropic drug resistance1 (PDR1) from Petunia hybrida transports strigolactones (SLs) from the root tip to the plant shoot but also outside to the rhizosphere, where SLs are the main attractants to mycorrhizal fungi. Last but not least, ABCG36 and ABCG37 possibly play a dual role in coumarine and IBA transport.