Gershenzon Jonathan, Murtagh G John, Croteau Rodney
Institute of Biological Chemistry, Washington State University, 99164-6340, Pullman, WA, USA.
Oecologia. 1993 Dec;96(4):583-592. doi: 10.1007/BF00320517.
Terpenes are commonly believed to undergo rapid metabolic turnover in plants, but the evidence for this process comes largely from studies that used detached organs or applied radiolabeled precursors in unnatural ways. When CO pulse labeling experiments were carried out with intact plants of four taxonomically distant, terpene-accumulating species, no significant turnover of monoterpenes, sesquiterpenes or diterpenes was detected in young foliage over a two week period after exposure to CO. These results are consistent with those of other investigations performed under physiologically realistic conditions, and caution against the uncritical incorporation of turnover into models or theories concerning plant chemical defense.
人们普遍认为，萜类化合物在植物中会经历快速的代谢周转，但这一过程的证据主要来自使用离体器官或以非自然方式应用放射性标记前体的研究。当对四种分类学上差异较大、积累萜烯的完整植物进行CO脉冲标记实验时，在接触CO后的两周时间里，未在幼嫩叶片中检测到单萜、倍半萜或二萜有显著的周转。这些结果与在生理实际条件下进行的其他研究结果一致，并告诫人们不要不加批判地将周转纳入有关植物化学防御的模型或理论中。
