EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

How tree roots gather oxygen from soil for energy supply by respiration






Zeitschrift fuer Naturforschung Section C Journal of Biosciences 52(11-12): 824-827

How tree roots gather oxygen from soil for energy supply by respiration

The gas exchange between the root system of the European alder (Alnus glutinosa (L.) Gaertn.) and the surrounding soil is studied using four-year-old trees. For the experiments the root system connected to its stump is exposed to gases of different molar mass. The stump is cut above the soil surface and in contact with the external atmosphere. A net convective volume flow of gas from the soil into the roots and out of the stump is observed if the mean molar mass of the gas present in the soil is lower than that present in the intercellular space of the roots. The direction of the convective gas flow can be reversed by increasing the molar mass of the gas present in the soil. These phenomena are governed by Graham's law of diffusion. They demonstrate the importance of gas convection for the gas exchange in tree roots.


Accession: 003162672



Related references

Influence of nitrogen and potassium nutrition of wheat and oxygen supply of roots on bacterial numbers, respiration of roots and denitrification in the rhizosphere. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abt.: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie 126(2): 130-141, 1971

Oxygen diffusion in the soil-plant system. 4. Oxygen concentration profiles, respiration rates, and radial oxygen losses predicted for rice roots. Agron. J, 62: 3, 329-332. Blbl. 9, 1970

Oxygen diffusion in the soil plant system part 4 oxygen concentration profiles respiration rates and radial oxygen losses predicted for rice m roots. Agronomy Journal 62(3): 329-332, 1970

Responses of soil respiration and barley growth to modified supply of oxygen in the soil. Agricultural & Food Science in Finland 9(4): 303-318, 2000

Soil respiration and organic matter supply by the roots and litter of a sugarcane crop. Agronomia Tropical Maracay 45(1): 121-142, 1995

Respiration of apple tree leaves and roots in conditions of temporary soil waterlogging. Sel' skokhozyaistvennaya Biologiya ( 5): 78-83, 1994

Effect of the nitrogen and potassium nutrition of wheat and of the oxygen supply to roots on bacterial numbers, root respiration, and denitrification in the rhizosphere. Zentralblatt fur Bakteriologie und Parasit-enkunde, II, 126: 130-141, 1971

Oxygen diffusion in the soil-plant system. 3. Oxygen concentration profiles, respiration rates, and the significance of plant aeration predicted for maize roots. Agron. J, 62: 3, 325-29. Blbl. 16, 1970

Oxygen diffusion in the soil plant system part 3 oxygen concentration profiles respiration rates and the significance of plant aeration predicted for maize m roots. Agronomy Journal 62(3): 325-329, 1970

Photosynthesis photo respiration respiration of shoots and respiration of roots of wheat seedlings as influenced by oxygen concentration. Zeitschrift fuer Pflanzenphysiologie 89(3): 217-226, 1978