Zusammenfassung
In Anlehnung an die Befunde anderer Autoren wird die Sauerstoffabhängigkeit der Netto-CO2-Aufnahme als ein Ausdruck der „Lichtatmung“ gedeutet. Durch Messung der CO2-Aufnahme in Luft und einem Gasgemisch gleichen CO2-Gehaltes mit 1,5% O2 wurde der Einfluß des Sauerstoffs auf die CO2-Aufnahme von Vertretern aus 54 Familien der Spermatophyten und einem Vertreter der Farne untersucht. Keinen oder einen sehr geringen Einfluß hat der Sauerstoff auf die CO2-Aufnahme von Vertretern der GattungCyperus (Cyperaceae), Vertreter der TribenAndropogonoideae, Panicoideae undEragrostoideae (Gramineae), alle untersuchtenAmaranthus-Arten (Amaranthaceae) undPortulaca (Portulacaeae). Bei allen anderen untersuchten Formen ist die CO2-Aufnahme bei der höheren Sauerstoffkonzentration um etwa 20 bis 40% geringer als bei niedrigem Sauerstoffdruck.
Summary
Considering the results of other authors the oxygen dependence of CO2-uptake was assumed to be an effect of photorespiration. The CO2-uptake of members from 54 families of the spermatophytes and 1 fern was measured in the air and in nitrogen with 1,5% oxygen. CO2-uptake was not or only slightly influenced by oxygen in the members of the following taxa: genusCyperus (Cyperaceae), tribesAndropogonoideae, Panicoideae andEragrostideae (Gramineae), familiesAmaranthaceae andPortulacaceae. In all other investigated forms the CO2-uptake in the air is 20–40% lower than in nitrogen with 1,5% oxygen.
Краткое содержание
Кислородная зависимость поглощения CO2 (нетто) рассматривается, согласно с работами некоторых других авторов, как оценка „светового дыхания“. Измерением поглощения CO2 в воздухе и в смеси газов, с тем же содержанием CO2 и 1,5% O2, устанавливалось влияние кислорода на поглощение CO2 у представителей 54 семейств семенных растений и у одного вида папоротника. Оказалось, что кислород не оказывает никакого нли только очень слабое влияние на поглощение CO2 у представителей родаCyperus (Cyperaceae), представителей триб Andropogonoideae, Panicoideae, Eragrostoideae (Gramineae) и всех исследованных видовAmaranthus (Amaranthaceae) иPortulaca (Portulacaceae). У всех остальныхисследо ванных растений иоглощение CO2 оказалось при высоких концентрциях кислорода на 20 или даже на 40% ниже, чем при низком кислородном давлении.
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Apel, P. Zum systematischen Aspekt des Sauerstoffeinflusses auf die apparente CO2-Aufnahme höherer Pflanzen. Die Kulturpflanze 17, 191–204 (1969). https://doi.org/10.1007/BF02097945
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DOI: https://doi.org/10.1007/BF02097945