ISHS Acta Horticulturae 458: International Symposium on Water Quality & Quantity-Greenhouse
INVESTIGATION OF OPPOSITELY DIRECTED WATER FLOWS IN ROOTS AS AN APPROACH TO THE IDENTIFICATION OF THE PLANT'S INTEGRAL HYDRODYNAMIC SYSTEM |
| Author: | V.S. Volkov |
| Keywords: | Zea mays L., exudation, root segments, integral hydrodynamic system, biomediators |
| Abstract:
Experiments with root segments of 5–6-day-old Zea mays L. seedlings demonstrated that the segments maintained the ability to exude not only from their basal end (ascending water flow), but from their apical end (descending water flow) too. Exudation from the basal end of segments resembled bleeding, whereas the exudation from the apical end differed in its rate, Vant Hoff temperature coefficient Q10, exudate osmotic pressure and sensitivity to biomediators (noradrenaline and acetylcholine). This system of oppositely directed water flows in root segments is considered with respect to the plant's integral hydrodynamic system. Problems of plant demands for water consumption related to water circulation in plants are discussed as well. | |
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