榆林市5个优势品种桑树的1-脱氧野尻霉素含量变化规律研究

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中图分类号：S888.3 文献标识码：A 文章编号：0488-5368（2025）12-0011-05

Abstract： The 1-deoxynojirimycin（DNJ） content in diferent tissues （leaves，branch bark cortex，and xylem）and sub-tissues of five mulberry varieties（‘Wubao’，‘Fengchi No.2’，‘Fengchi No.1’，‘ Xuan 792’，and‘Jingsang'）was quantified using high -performance liquid chromatography with ultraviolet detection （HPLC-UV）to investigate DNJdistribution paterns and temporal dynamics.This study aimed to identify the variety with the highest DNJ content，determine DNJ-enriched tissues，and define optimal harvesting times. Key findings are as follows：Optimal variety and harvesting period：‘Wubao’exhibitedthe highest DNJ accumulation，with late July identified as theoptimal harvesting period.Tissue and sub-tissue specificity： Significant differences in DNJ content were observed among tissues and sub -tissues.DNJ was predominantly enriched in the apical buds of leaves and the lower cortex of branch bark in‘Wubao’.Temporal variation：DNJ accumulationpeaked in late July，aligning with the physiological maturation stage of mulberrytisses.These results provide atheoretical foundationand practical guidelines for DNJ-oriented mulberry cultivationand harvesting strategies in theYulinregion.The findings highlightthe potential of‘Wubao’as a prioritycultivar for industrial DNJ extraction， particularly targeting its apical buds and lower bark cortex during late July.

Key words：Mulberry tree；Variety；DNJ；Harvesting time；Collection site

桑树（MorusalbaL.）在我国具有悠久的栽培历史，种质资源十分丰富[1]，桑树不仅具有饲用和生态价值[2]，还有很高的食用[3]、药用价值[4.5]桑树的桑叶、桑椹、桑枝与桑白皮等都可人药[6]现代药理学研究表明，桑树各药用部位含有的羟基生物碱具有很好的降血糖功效[7.8]，1－脱氧野尻霉素（1-deoxynojirimycin，DNJ）是其中最重要的一种生物碱[9.10]。（剩余7572字）