Non-dormant turions of the duckweed Spirodela polyrhiza (L.) Schleiden were used to investigate endogenous ion currents in light-induced germination and early growth of higher plants. Before light treatment, a small outward current was measured at the ventral side of the turions near the pocket containing the most developed sprout primordium. After a light pulse the direction of the endogenous current changed from outward to inward. Dormant turions showed no significant light-induced endogenous current. After germination, young sprouts of Spirodela showed highest inward current near the sprout base where cells grew rapidly and divide frequently. Ageing of sprouts resulted in a fast decrease of endogenous current.
|Number of pages||5|
|Journal||Journal of Plant Physiology|
|Publication status||Published - May 2000|
Bibliographical noteFunding Information:
This work was supported by the Deutsche Forschungsgemeinschaft (DFG 436RusI7/37/95 and Ap54/5-1). We thank Pro£ M. H. Weisenseel, University of Karlsruhe, Germany who provided the equipment for measurement of the ion currents and has supported the work in each period. We thank Dr. I. Dahse for critical comments and Pro£ I. D. Volotovsky, Belarus Academy of Sciences, Minsk for his general support.
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- Endogenous ion current
- Spirodela polyrhiza