title: Brassinosteroids Regulate Root Growth, Development, and Symbiosis.
abstract: Brassinosteroids (BRs) are natural plant hormones critical for growth and development. BR deficient or signaling mutants show significantly shortened root phenotypes. However, for a long time, it was thought that these phenotypes were solely caused by reduced cell elongation in the mutant roots. Functions of BRs in regulating root development have been largely neglected. Nonetheless, recent detailed analyses, revealed that BRs are not only involved in root cell elongation but are also involved in many aspects of root development, such as maintenance of meristem size, root hair formation, lateral root initiation, gravitropic response, mycorrhiza formation, and nodulation in legume species. In this review, current findings on the functions of BRs in mediating root growth, development, and symbiosis are discussed.
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
authors.forename: Zhuoyun
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China. Electronic address: lijia@lzu.edu.cn.
authors.forename: Jia
authors.initials: J
authors.lastname: Li
mesh_terms: D060406:Brassinosteroids / Q000506:poisoning*; D018517:Plant Roots / Q000254:growth & development*; D013559:Symbiosis
chemical_list: D060406:Brassinosteroids
keywords: brassinosteroids; gravitropic response; lateral root development; root hair; root meristem; symbiosis