Influence of root oxygen deficiency on photosynthesis and saccharide contents of Carex species
1993
Moog, P.R. (Oldenburg Univ. (Germany). Fachbereich Biologie) | Brueggemann, W.
The responses to root oxygen deficiency concerning the photosynthesis, saccharide contents and mineral uptake have been investigated in Carex species, which were different in their anoxia-tolerance. The net rate of photosynthesis (PN) of the anoxia-sensitive C. extensa was not affected by root anaerobiosis. Despite short-term effects of root anaerobiosis on PN values in the anoxia-tolerant species C. remota and C. pseudocyperus, root oxygen supply did not influence PN, when the plants were allowed to acclimate. The saccharide contents of the anoxia-tolerant species were almost not affected by prolonged anaerobiosis. 40 days of root oxygen deficiency led to significant changes in the shoot saccharide composition of C. extensa: contents of glucose and fructose were increased 4-fold and sucrose content was significantly decreased.
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