Journal
MOLECULAR PLANT
Volume 9, Issue 1, Pages 86-100Publisher
CELL PRESS
DOI: 10.1016/j.molp.2015.12.003
Keywords
brassinosteroids; root meristem; root hair; lateral root development; gravitropic response; symbiosis
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Funding
- National Natural Science Foundation of China [91317311, 31470380, 31530005]
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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.
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