Leaf-movement factors of nyctinastic plant, Phyllanthus urinaria L.; the universal mechanism for the regulation of nyctinastic leaf-movement

Minoru Ueda, Miho Asano, Yoshiyuki Sawai, Shosuke Yamamura

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Phyllanthurinolactone (1) and phyllurine (2) were isolated from Phyllanthus urinaria L. as bioactive substances for nyctinasty. Compound 1 was quite effective for leaf-closing of the plant at 1 x 10-7 M in the daytime and 2 was quite effective for the leaf-opening at 2.5 x 10-5 M, whereas both 1 and 2 were not effective for other nyctinastic plants even at 1 x 10-4 M. The concentration of 1 increased before leaf-closure in the plant body, whereas that of 2 was constant through a day. Thus, the leaf- movement of P. urinaria L. is proposed to be controlled by the change in the balance of concentration between 1 and 2, which is regulated by a β- glucosidase, similar to the case of Lespedeza cuneata G. Don.

Original languageEnglish
Pages (from-to)5781-5792
Number of pages12
JournalTetrahedron
Volume55
Issue number18
DOIs
Publication statusPublished - 1999 Apr 30
Externally publishedYes

Keywords

  • Biologically active compounds
  • Natural products
  • Plants

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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