关键词: 彩色马铃薯, 试管薯, 结薯效率, 水杨酸, 蔗糖

Abstract: 【Objective】 In order to improve the tuberization efficiency of pigmented potato in vitro, reduce production cost and provide basis for factory production of microtuber. 【Method】 Eight pigmented potato lines were used as tested materials to study the effects of 12% sucrose, 0.5 mmol/L salicylic acid (SA) and 40 mmol/L high potassium treatment on the microtuber tuberization. 【Result】 12% sucrose treatment could increase the single plant yield of microtuber and starch content. 0.5 mmol/L SA treatment increased the yield of different lines by 19%-192%, but the starch content decreased slightly. 40 mmol/L high potassium treatment had no significant effect on the yield and starch content of microtuber, or inhibited the microtuber formation of a few lines and decreased the starch content. In addition, SA had the effect of promoting the early tuber growth, which was averagely about 15-25 days ahead of the control, forming a diameter of 3-5 mm potato tuber. The reagent cost of 0.5 mmol/L SA treatment was the lowest for producing 1 kg microtubers, only 56.89% of the control. 【Conclusion】 0.5 mmol/L SA treatment has the advantages of low cost and high tuberization efficiency, and has practical application potential.

Key words: pigmented potato, microtuber, tuberization efficiency, salicylic acid, sucrose