Open AccessA Circadian Rhythm in Oxygen Uptake by Samanea Pulvini
Author(s) -
Ruth L. Satter,
Alexander M. Hatch,
Marie K. Gill
Publication year - 1979
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.64.3.379
Subject(s) - circadian rhythm , respiration , rhythm , darkness , biology , botany , chemistry , medicine , endocrinology
The rate of O(2) uptake by excised Samanea pulvini oscillates with a circadian rhythm during 52 hours of darkness. Rates of respiration increase during pulvinar opening and decrease prior to and during closure, consistent with the concept that opening requires a greater expenditure of energy. Externally supplied sucrose, necessary for perpetuation of the leaflet movement rhythm, has a small promotive effect on the rate of respiration.
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