兰州大学植物生理研究室. 甘肃,兰州 730000
马铃薯切片陈化过程中, 总呼吸速率和交替途径容量分别升高了5倍和28倍, 但交替途径在无KCN存在下几乎不运行。用20#mu#mol/L的水杨酸处理陈化切片可引起总呼吸速率 和交替途径容量的少量增加, 但交替途径的运行却明显加强。水杨酸的这种促进作用在Percoll纯化的线粒体中也有出现。马铃薯切片中交替途径运行的增加导致了线粒体呼吸控制比及ADP/O下降。
Salicylic acid-induced increase of activity of the alternative pathway during aging of potato tuber slices
Wen Jiangqi, Liang Houguo
Department of Biology, Lanzhou University. Lanzhou 730000,Gansu
During the aging process, the total respiration rate (V_(t)and the capacity of alternative pathway (V_(ait) in slices in creased by 5-fold and 28-fold, respectively, but the alternative pathway was almost not operative in the absence of KCN. Application of 20#mu#mol/L of salicylic acid to aging slices slightly increased the total respiration rate and the capacity of alternative pathway, however however, the operation of the SHAM-sensitive alternative pathway was greatly enhanced by application of salicylic acid. The elevated operation of the alternative pathway, which is known as the nonphosphorlating elec ron transport system, led to a decline of the RCR ratio as well as of the ADP/O value in mitochondria.
文江祁, 梁厚果. 水杨酸对陈化马铃薯切片交替途径活性的诱导作用[J]. 生理学报 1995; 47 (3): .
Wen Jiangqi, Liang Houguo. Salicylic acid-induced increase of activity of the alternative pathway during aging of potato tuber slices. Acta Physiol Sin 1995; 47 (3): (in Chinese with English abstract).