The chemical NJ15 affects hypocotyl elongation and shoot gravitropism via cutin polymerization

Naiyanate Jaroensanti-Tanaka, Sho Miyazaki, Akito Hosoi, Keisuke Tanaka, Shinsaku Ito, Satoshi Iuchi, Takeshi Nakano, Masatomo Kobayashi, Masatoshi Nakajima, Tadao Asami

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We previously found a chemical, designated as NJ15, which inhibited both auxin and brassinosteroid responses in dark-grown Arabidopsis. To study its mode of action, we performed a phenotypic screening of NJ15-low-sensitive lines among mutant pools of Arabidopsis. One line (f127) showed clear NJ15-low-sensitivity in terms of hypocotyl elongation and shoot gravitropism. After further testing, it was determined that DCR, an enzyme involved in cutin polymerization, had lost its function in the mutant, which caused its low sensitivity to NJ15. Fatty acids are the base materials for polymers such as cutin and cuticular wax. We confirmed that NJ15 affects fatty acid biosynthesis, and that it does differently from cafenstrole, a known inhibitor of cuticular wax formation. Based on these results, we propose that the target of NJ15 is likely located within the cutin polymer formation pathway.

Original languageEnglish
Pages (from-to)1770-1779
Number of pages10
JournalBioscience, Biotechnology and Biochemistry
Issue number10
Publication statusPublished - 2018


  • Crosstalk
  • Cuticle
  • DCR
  • Fatty acid
  • Wax

ASJC Scopus subject areas

  • General Medicine


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