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Regulation of brassinosteroid responses by Phytochrome DONG-HOON JEONG, SHINYOUNG LEE, SONG LIM KIM, ILDOO HWANG & GYNHEUNG AN
 

Summary: Regulation of brassinosteroid responses by Phytochrome
B in rice
DONG-HOON JEONG, SHINYOUNG LEE, SONG LIM KIM, ILDOO HWANG & GYNHEUNG AN
Department of Life Science and Functional Genomic Center, Pohang University of Science and Technology (POSTECH),
Pohang 790-784, Republic of Korea
ABSTRACT
Plant growth and development are coordinately controlled
by environmental signals and internal factors. Light signals,
mediated by phytochromes, regulate photomorphogenesis
by interacting with endogenous programmes that involve
multiple phytohormones. Brassinosteroids (BRs) are a
group of growth-promoting phytohormones with a crucial
role in the light-dependent development of plants. How-
ever, the interaction between light-signalling pathways and
BR signalling is not well understood. Here, we examined
the responses of lamina joint inclination and coleoptile
elongation to exogenous brassinolide (BL) under light or
dark conditions. Both responses were more pronounced
under darkness, implying that BR signalling is inhibited by
light. To elucidate which phytochrome is involved in this

  

Source: An, Gynheung - Department of Life Science, Pohang University of Science and Technology

 

Collections: Biotechnology; Biology and Medicine