The plant hormone auxin is essential for plant growth and development, controlling both organ development and overall plant architecture. Auxin homeostasis is regulated by coordination of biosynthesis, transport, conjugation, sequestration/storage, and catabolism to optimize concentration-dependent growth responses and adaptive responses to temperature, water stress, herbivory and pathogens. At present, the best defined pathway of auxin biosynthesis is the TAA/YUC route, in which the tryptophan aminotransferases TAA and TAR and YUCCA flavin-dependent monooxygenases produce the auxin indole-3-acetic acid from tryptophan. This review highlights recent advances in our knowledge of TAA/YUC-dependent auxin biosynthesis focussing on membrane localisation of auxin biosynthetic enzymes, differential regulation in root and shoot tissue, and auxin biosynthesis during abiotic stress.
Blakeslee, Joshua J.Spatola Rossi, TatianaKriechbaumer, Verena
Faculty of Health and Life Sciences\Department of Biological and Medical Sciences
Year of publication: 2019Date of RADAR deposit: 2019-06-04
“This is a pre-copyedited, author-produced version of an article accepted for publication in Journal of Experimental Botany following peer review.”