Treichel Siegfried, Bauer Peter
Fachbereich Biologie-Botanik der Technischen Hochschule Darmstadt, Darmstadt, Deutschland.
Oecologia. 1974 Mar;17(1):87-95. doi: 10.1007/BF00345097.
CO-exchange, diurnal changes in malate- and ion concentrations of the halophytes Carpobrotus edulis, Crithmum maritimum, Mesembryanthemum nodiflorum, Salicornia fruticosa, Suaeda maritima, and Trifolium fragiferum were investigated after culture at different NaCl concentrations. In Carp. edulis and Mes. nodiflorum the diurnal rhythm of CO-exchange is in accordance with that of crassulacean acid metabolism (CAM), in Sal. fruticosa, Crithm. maritimum, Suaeda maritima, and Trif. fragiferum with that of Benson-Calvin metabolism (C). Malate concentration and CO uptake in the sap latter group are not influenced. On the other hand, Carp. edulis and Mes. nodiflorum show an accumulation of malate during the night, which can be interpreted as a further indication of CAM.The two species most resistant to NaCl, Carp. edulis and Sal. fruticosa, greatly differ very much in their NaCl content. NaCl concentration in Salicornia is four times higher than in Carpobrotus.The different metabolic properties studied might be of ecological importance for the plants in their natural habitats. The effect of NaCl on metabolic processes is discussed.
在不同氯化钠浓度下培养后，研究了食用日中花、滨海刺芹、无梗冰花、灌木状盐角草、海滨碱蓬和草莓三叶草等盐生植物的二氧化碳交换、苹果酸和离子浓度的昼夜变化。在食用日中花和无梗冰花中，二氧化碳交换的昼夜节律与景天酸代谢（CAM）一致，在灌木状盐角草、滨海刺芹、海滨碱蓬和草莓三叶草中与本森-卡尔文代谢（C）一致。后一组植物汁液中的苹果酸浓度和二氧化碳吸收不受影响。另一方面，食用日中花和无梗冰花在夜间表现出苹果酸积累，这可被解释为景天酸代谢的进一步指征。对氯化钠最具抗性的两个物种，食用日中花和灌木状盐角草，其氯化钠含量差异很大。盐角草中的氯化钠浓度比食用日中花高四倍。所研究的不同代谢特性可能对这些植物在其自然栖息地具有生态重要性。讨论了氯化钠对代谢过程的影响。
