Winter Klaus
Fachbereich Biologie der Technischen Hochschule Darmstadt, Darmstadt, Deutschland.
Oecologia. 1974 Dec;15(4):383-392. doi: 10.1007/BF00345435.
The halophytic species Mesembryanthemum crystallinum was induced to exhibit CAM-like CO gas-exchange reactions with a depression of net CO uptake during the day and a net CO uptake during the night by treatment with 400 mM NaCl. The induction of CAM is favored by relatively high day temperatures and relatively low night temperatures. Net CO uptake in the dark is largely increased by an interruption of water absorption by the plants, whereas light CO fixation is decreased by this treatment. When plants are rewatered after a two days drought period, net CO uptake in the dark is clearly favored over CO light fixation. During the post-stress period a slight reduction of leaf chlorophyll content becomes apparent. Under the experimental conditions used a reversibility of CO fixation metabolism from CAM to C is observed when salt-treated plants are transferred to non-saline root medium. This is paralleled by a largely enhanced leaf expansion and a drastically increased leaf water content.
通过用400 mM氯化钠处理，诱导盐生植物冰花（Mesembryanthemum crystallinum）表现出类似景天酸代谢（CAM）的CO₂气体交换反应，即白天净CO₂吸收量降低，夜间净CO₂吸收量增加。相对较高的白天温度和相对较低的夜间温度有利于CAM的诱导。植物水分吸收中断会大幅增加黑暗中的净CO₂吸收量，而这种处理会降低光下CO₂固定量。在两天干旱期后给植物重新浇水时，黑暗中的净CO₂吸收明显优于光下CO₂固定。在胁迫后时期，叶片叶绿素含量略有下降。在所使用的实验条件下，当将盐处理的植物转移到无盐根培养基中时，观察到CO₂固定代谢从CAM可逆转为C₃。这伴随着叶片扩展大幅增强和叶片含水量急剧增加。
