Articles
INVESTIGATION OF OPPOSITELY DIRECTED WATER FLOWS IN ROOTS AS AN APPROACH TO THE IDENTIFICATION OF THE PLANT’S INTEGRAL HYDRODYNAMIC SYSTEM
Article number
458_30
Pages
247 – 252
Language
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.
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.
Authors
V.S. Volkov
Keywords
Zea mays L., exudation, root segments, integral hydrodynamic system, biomediators
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