Burbott A J, Loomis W D
Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon 97331.
Plant Physiol. 1969 Feb;44(2):173-9. doi: 10.1104/pp.44.2.173.
Two types of experimental evidence are presented which suggest that the monoterpenes of peppermint (Mentha piperita L.) are subject to metabolic turnover. In kinetic studies with (14)CO(2), peppermint cuttings rapidly incorporate label into the monoterpenes and then lose most of the label from the monoterpenes, without corresponding changes in the amount of monoterpenes present. When peppermint plants are grown in a controlled environment (16-hr photoperiod, 24 degrees day, 8 degrees night) and analyzed at intervals leaf pair by leaf pair, there is a steady increase in monoterpenes until the time of floral initiation, followed by a rapid decrease. It is suggested that monoterpenes may serve as substrates for energy metabolism in the secretory cells after other stored substrates have been depleted.
本文提供了两类实验证据，表明薄荷（Mentha piperita L.）中的单萜类化合物会发生代谢周转。在使用（14）CO（2）的动力学研究中，薄荷插条迅速将标记物掺入单萜类化合物中，然后大部分标记物又从单萜类化合物中丢失，而单萜类化合物的含量并未发生相应变化。当薄荷植株在可控环境（16小时光周期、白天24摄氏度、夜晚8摄氏度）中生长，并逐叶对间隔进行分析时，单萜类化合物的含量在花芽分化前持续稳定增加，随后迅速下降。有人认为，在其他储存底物耗尽后，单萜类化合物可能作为分泌细胞中能量代谢的底物。
