Journal Article

Chemical Basis of Plant Leaf Movement

Minoru Ueda and Yoko Nakamura

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 48, issue 7, pages 900-907
Published in print July 2007 | ISSN: 0032-0781
Published online July 2007 | e-ISSN: 1471-9053 | DOI:
Chemical Basis of Plant Leaf Movement

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry


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Nyctinastic plants open and close leaves with a circadian rhythm. Here we discuss chemical aspects of the mechanism of nyctinastic leaf movement. Nyctinastic plants from five different genera are known to contain species-specific leaf-opening and leaf-closing factors. The relative concentrations of leaf-closing and leaf-opening factors of the nyctinastic plant Phyllanthus urinaria change circadianly, suggesting that nyctinastic movement is regulated by two classes of circadianly regulated factors with opposing functions. A closing and an opening factor of Albizzia, when linked to a fluorescent dye, both specifically labeled motor cells of pluvini. A membrane fraction of pluvini contains proteins of 210 and 180 kDa that bind to a leaf-opening factor of Cassia mimosoides. The molecular identification of these proteins is underway.

Keywords: Endogenous bioactive substance; Legumes; Motor cell; Nyctinasty; Receptor

Journal Article.  3122 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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