1,4-二甲基萘对马铃薯种薯抑芽及碳水化合物代谢的调控OA

To explore the sprout inhibition effect of 1,4-dimethylnaphthalene on potato(Solanumtu-berosum L.)seed tubers and its regulatory mechanism of carbohydrate metabolism,mini tubers of Qingshu No.9'were used as experimental materials.The sprout-inhibiting effects of different 1,4-DMN treatment doses(0.01,0.02,0.05,0.10,0.20 mL/kg)on seed tubers,as well as the impacts of the optimal dose on weight loss rate,respiratory intensity,α-amylase activity,starch content,reduc-ing sugar content,and malondialdehyde(MDA)content of seed tubers during storage were conduc-ted.The results showed that 1,4-DMN treatment exhibited a significant sprout-inhibiting effect on potato seed tubers.Considering the sprout-inhibiting effect and application cost comprehensively,0.02 mL/kg was determined as the optimal treatment dose.Compared with the control group,1,4-DMN treatment could significantly reduce the weight loss rate and respiratory intensity of seed tubers dur-ing storage,inhibit the increase in α-amylase activity,slow down the starch degradation rate,main-tain a relatively high reducing sugar content and simultaneously reduce the accumulation of MDA con-tent.The study indicated that 1,4-DMN effectively maintained the storage quality of potato seed tu-bers by inhibiting sprout growth,regulating carbohydrate metabolism and alleviating membrane lipid peroxidation damage.