DWARF overexpression induces alteration in phytohormone homeostasis, development, architecture and carotenoid accumulation in tomato.

ABSTRACT: Brassinosteroids (BRs) play a critical role in plant growth, development and stress response; however, genetic evidence for the BR-mediated integrated regulation of plant growth still remains elusive in crop species. Here, we clarified the function of DWARF (DWF), the key BR biosynthetic gene in tomato, in the regulation of plant growth and architecture, phytohormone homeostasis and fruit development by comparing wild type, d^(im), a weak allele mutant impaired in DWF, and DWF-overexpressing plants in tomato. Results showed that increases in DWF transcripts and endogenous BR level resulted in improved germination, lateral root development, CO2 assimilation and eventually plant growth as characterized by slender and compact plant architecture. However, an increase in DWF transcript down-reg

SUBMITTER: Li XJ 

PROVIDER: S-EPMC11388817 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature