中国生态农业学报（中英文）2026，Vol.34Issue(5)：977-988,12.DOI:10.12357/cjea.20250485
马铃薯表皮毛的空间分布特征及其抗虫性机理
Spatial distribution characteristics of potato trichomes and their insect resistance mechanism
摘要
Abstract
Trichomes are plant-derived external appendages that play a crucial role in plant stress resistance.This study examined the spatial distribution characteristics of trichomes and conducted insect resistance tests on nine potato varieties(lines)with high,medium,and low trichome densities.Using a comprehensive targeted metabolomics approach,we compared the metabolic profiles between two varieties(lines),'Tianshu 15'and'S10-510',with the greatest differences in trichome density.The results showed that 1)the trichomes on potato leaves exhibited polymorphic distribution patterns,with significantly lower trichome density on the adaxial surface than on the abaxial surface.2)The percentage of insect-damaged leaves and the number of insects per hundred leaves showed negative correlations with both non-glandular trichomes and glandular trichomes on the adaxial surface and on the abaxial surface.Varieties(lines)with high trichome density exhibited greater insect resistance than those with medium or low trichome density.There was a significant correlation between trichome density and insect resistance.3)Widely targeted metabolomics detected a total of 1 717 distinct metabolites.Among them,phenolic acids,lipids,alkaloids,and flavonoids were most abundant,accounting for 16.70%,14.91%,12.75%,and 12.06%of the total detected metabolites,respectively.Significant metabolic differences were observed between'Tianshu 15'and'S10-510',with 446 differential metabolites identified.Among them,238 metabolites showed significant upregulation,while 208 metabolites exhibited significant downregulation.The top five pathways enriched with the most differential metabolites were secondary metabolites,ABC transporters,tryptophan metabolism,flavone and flavanol biosynthesis,and glycolysis.This study provides valuable insights for research on the mechanisms of pest and disease resistance in potatoes and for the breeding of new varieties(lines).关键词
马铃薯/表皮毛/空间分布特征/抗虫性/代谢物Key words
potato/trichomes/spatial distribution characteristics/insect resistance/metabolites分类
农业科技引用本文复制引用
杨双,罗成丽,白磊,杨芳,郭华春,李俊..马铃薯表皮毛的空间分布特征及其抗虫性机理[J].中国生态农业学报（中英文）,2026,34(5):977-988,12.基金项目
国家重点研发计划项目(2022YFD1601802)和国家马铃薯产业技术体系建设专项(CARS-09-P15)资助 This study was supported by the National Key Research and Development Program of China(2022YFD1601802),and the Special Project for the Construction of National Potato Industry Technology System(CARS-09-P15). （2022YFD1601802）
