Light-stimulated inositolphospholipid turnover in Samanea saman leaf pulvini
نویسندگان
چکیده
منابع مشابه
Potassium Flux and Leaf Movement in Samanea saman
Samanea leaflets usually open in white light and fold together when darkened, but also open and dose with a circadian rhythm during prolonged darkness. Leaflet movement results from differential changes in the turgor and shape of motor cells on opposite sides of the pulvinus; extensor cells expand during opening and shrink during closure, while flexor cells shrink during opening and expand duri...
متن کاملA circadian rhythm in oxygen uptake by samanea pulvini.
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 pro...
متن کاملEffects of Light on the Membrane Potential of Protoplasts from Samanea saman Pulvini : Involvement of K Channels and the H -ATPase.
Rhythmic light-sensitive movements of the leaflets of Samanea saman depend upon ion fluxes across the plasma membrane of extensor and flexor cells in opposing regions of the leaf-movement organ (pulvinus). We have isolated protoplasts from the extensor and flexor regions of S. saman pulvini and have examined the effects of brief 30-second exposures to white, blue, or red light on the relative m...
متن کامل12-hydroxyjasmonic acid glucoside is a COI1-JAZ-independent activator of leaf-closing movement in Samanea saman.
Jasmonates are ubiquitously occurring plant growth regulators with high structural diversity that mediate numerous developmental processes and stress responses. We have recently identified 12-O-β-D-glucopyranosyljasmonic acid as the bioactive metabolite, leaf-closing factor (LCF), which induced nyctinastic leaf closure of Samanea saman. We demonstrate that leaf closure of isolated Samanea pinna...
متن کاملDiurnal and circadian regulation of putative potassium channels in a leaf moving organ.
In a search for potassium channels involved in light- and clock-regulated leaf movements, we cloned four putative K channel genes from the leaf-moving organs, pulvini, of the legume Samanea saman. The S. saman SPOCK1 is homologous to KCO1, an Arabidopsis two-pore-domain K channel, the S. saman SPORK1 is similar to SKOR and GORK, Arabidopsis outward-rectifying Shaker-like K channels, and the S. ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1987
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.84.20.7075