2018 journal article

Local Auxin Biosynthesis Is a Key Regulator of Plant Development

DEVELOPMENTAL CELL, 47(3), 306-+.

By: J. Brumos n, L. Robles n, J. Yun n, T. Vu n, S. Jackson n, J. Alonso n, A. Stepanova n

co-author countries: United States of America 🇺🇸
MeSH headings : Arabidopsis / metabolism; Arabidopsis Proteins / metabolism; Biological Transport; Ethylenes / metabolism; Flowers / metabolism; Gene Expression Regulation, Plant / genetics; Indoleacetic Acids / metabolism; Meristem / embryology; Meristem / metabolism; Morphogenesis; Oxygenases; Plant Development / genetics; Plant Growth Regulators / genetics; Plant Growth Regulators / metabolism; Plant Roots / embryology; Plant Roots / genetics; Plant Roots / metabolism; Spatio-Temporal Analysis
Source: Web Of Science
Added: November 26, 2018

Auxin is a major phytohormone that controls numerous aspects of plant development and coordinates plant responses to the environment. Morphogenic gradients of auxin govern cell fate decisions and underlie plant phenotypic plasticity. Polar auxin transport plays a central role in auxin maxima generation. The discovery of the exquisite spatiotemporal expression patterns of auxin biosynthesis genes of the WEI8/TAR and YUC families suggested that local auxin production may contribute to the formation of auxin maxima. Herein, we systematically addressed the role of local auxin biosynthesis in plant development and responses to the stress phytohormone ethylene by manipulating spatiotemporal patterns of WEI8. Our study revealed that local auxin biosynthesis and transport act synergistically and are individually dispensable for root meristem maintenance. In contrast, flower fertility and root responses to ethylene require local auxin production that cannot be fully compensated for by transport in the generation of morphogenic auxin maxima.