流苏树叶片代谢物地理变异及其综合评价

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中图分类号：S791 文献标志码：A文章编号：1000-2006（2025）05-0123-08

Abstract：【Objective】To investigate thegeographical variationof leaf metabolites in Chionanthus retususandselect provenaces with superior metabolite content，this study providesa foundation for breeding tea-orientedvarietiesof Chionanthus retusus，as wellas theconservation and utilizationof its germplasmresources.【Method】Using leaf samples froml50 individual Chionanthus retusus tres representing 15 provenances across eight provinces，this studyanalyzed he contents of teapolyphenols，soluble sugars，glutamigacid，ascorbicacid，flavonoids，andanthocyanins.Through varianceanalysis，coeffientofvariationassessment，，corelationanalysis，clusteranalysis，principal componentanalysis （PCA），and comprehensive evaluation，we identified provenances with superior metabolite profiles.【Result】Both inter-provenance and intra-provenance differences reached highly significant levels （ P<0.001 ），indicatingrich trait variationin Chionanthus retusus germplasmresources.Metabolitecorrelationanalysisrevealedahighlysignificant positive corelation between glutamicacidand soluble sugars，as wellas significant positivecorelations between teapolyphenols andascorbicacid，andbetween tea polyphenolsandglutamicacid.Climate-metabolitecorrelationanalysis demonstrated significantpositiverelationshipsbetweenisothermality（bio-climaticfactor）andglutamicacid，and betweenanual precipitationandanthocyanins.Clusteranalysisgrouped the15Chionanthusretususprovenances into three distinct clusters，whichdidnotalignwith theirgeographicaldistribution．Comprehensiveevaluationfinallyidentifiedfour superiorprovenances：Nanzhao（Henan），Yichang（Hubei），Linyi（Shandong），and Chengde（Hebei）. 【Conclusion】Significant diferencesweredetected insixclassesof leaf metabolitesbothwithinandamong15 Chionanthus retusus provenances.Through comprehensive evaluation，four superior provenances were identified：Nanzhao （Henan），Yichang（Hubei），Linyi（Shandong），and Chengde（Hebei）. Keywords：Chionanthus retusus；germplasm resources；metabolite；comprehensive evaluation

流苏树（Chionanthusretusus）是木犀科（Oleaceae）流苏树属（Chionanthus）落叶乔木，常作为园林观赏树种[1]。（剩余17780字）