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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

Abstract

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.

Key words: Solanum tuberosum;Aging;Alternative pathway;Salicylic acid

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Citing This Article：

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).