Oxygen Transport and Root Respiration of Maize Seedlings
Open Access
- 1 August 1983
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 72 (4) , 1035-1039
- https://doi.org/10.1104/pp.72.4.1035
Abstract
Oxygen uptake and ATP/ADP ratio were simultaneously monitored during incubation of excised maize (Zea mays L. INRA 508) root tips under varying O2 partial pressure. Both variables were independent of O2 tension until a critical O2 pressure was reached. Below this pressure, ATP/ADP ratio and respiratory rate declined. However, in tissues having a high glycolytic capacity, the correlation between the ATP/ADP ratio and the respiratory rate breaks down as O2 tension decreases, due to the increasing contribution of fermentative processes.Keywords
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