Electrical conductivity and capacitance of root tissues in different conditions of energetic metabolism

Černohorská, Jana; Dvořák, Miroslav; Wiedenroth, E. M.

doi:10.1007/978-94-009-0891-8_18

Cited by 2 publications

(1 citation statement)

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“…This potassium efflux is attributed to depolarization of root cell membranes, a direct consequence of H+-ATP-ase inhibition (Buwalda et al, 1988;Cheeseman and Hanson, 1979) : a test carried out on beet root cells showed that after 5 hours of hypoxia the membrane electrical potential drops from -156 mV to -95 mV (Zhang et al, 1992). This is confirmed by an increase in tissue electrical conductivity, indicating a loss of membrane permeability (Cernohorska et al, 1989). In this case, the normal efflux o f K + ions is not compensated by root cell active influx of these ions.…”

Section: Root Excretions In Culture Mediummentioning

confidence: 99%

Plant injury due to oxygen deficiency in the root environment of soilless culture: A review

1996

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The deficiency of oxygen concentration in root environment linked to waterlogging conditions caused important injuries for plants. These effects could be reproduced by oxygen deficient nutrient solution. This bibliographical synthesis has been centered on experimental results obtained on plants cultivated in soilless culture. This review paper presents a methodology used to study oxygen depletion in a nutrient solution and to calculate root respiration rates. The main factors influencing root respiration are reviewed as well as the consequences of oxygen deficiency on roots and shoots functioning. This study would not be complete without some information on the main mechanisms of plant adaptation to oxygen deficiency. Root system respirationRoot system physiological activities require energy provided by glucidic substances produced in aerials parts and oxygen molecules. First, glucose is transformed into pyruvic acid by glycolysis. Then, pyruvic acid, oxidized in the Krebs cycle, is transformed into

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Section: Root Excretions In Culture Mediummentioning

confidence: 99%