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Light‐ and Clock‐Controlled Leaflet Movements in Samanea saman *: A Physiological, Biophysical and Biochemical Analysis **
Author(s) -
Satter Ruth L.,
Morse M. J.,
Lee Youngsook,
Crain Richard C.,
Coté Gary G.,
Moran Nava
Publication year - 1988
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1988.tb00034.x
Subject(s) - leaflet (botany) , circadian rhythm , biophysics , circadian clock , biology , chemistry , neuroscience , botany
Leaflet movements in the legume Samanea saman are under joint control by light and a circadian oscillator. The movements are driven by massive fluxes of K + , Cl − , and H + through pulvinar motor cell membranes. Light and the oscillator affect leaflet movements by altering the activity of ion transport systems. Some effects of light on ion transport may be mediated by the phosphatidylinositol (PI) cycle, since brief irradiation of the pulvinus with white light accelerates PI turnover.