Transport mechanisms of plant hormones

• Published in: Current opinion in plant biology Vol. 63; p. 102055
• Main Authors: Anfang, Moran, Shani, Eilon
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2021
• Subjects: ABA; ABC transporters; Abscisic acid; Auxin; auxins; biosynthesis; Brassinosteroid; brassinosteroids; Cytokinin; cytokinins; Ethylene; Gibberellin; gibberellins; Hormone transport; IAA; Jasmonic acid; NPF transporters; Phytohormones; plant growth; Plant hormones; Salicylic acid; Strigolactone; strigolactones; substrate specificity; Transport mechanisms; ABA; Salicylic acid; Auxin; Ethylene; IAA; Gibberellin; Strigolactone; Plant hormones; Cytokinin; Brassinosteroid; Transport mechanisms; Hormone transport; Phytohormones; Abscisic acid; ABC transporters; NPF transporters; Jasmonic acid
• ISSN: 1369-5266; 1879-0356; 1879-0356
• DOI: 10.1016/j.pbi.2021.102055

Plant growth, development, and response to the environment are mediated by a group of small signaling molecules named hormones. Plants regulate hormone response pathways at multiple levels, including biosynthesis, metabolism, perception, and signaling. In addition, plants exhibit the unique ability to spatially control hormone distribution. In recent years, multiple transporters have been identified for most of the plant hormones. Here we present an updated snapshot of the known transporters for the hormones abscisic acid, auxin, brassinosteroid, cytokinin, ethylene, gibberellin, jasmonic acid, salicylic acid, and strigolactone. We also describe new findings regarding hormone movement and elaborate on hormone substrate specificity and possible genetic redundancy in hormone transport and distribution. Finally, we discuss subcellular, cell-to-cell, and long-distance hormone movement and local hormone sinks that trigger or prevent hormone-mediated responses.