基于代谢组揭示雪兔和妙香7号草莓果实香气物质的差异

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Abstract：To clarify the diferences in aroma compounds between white strawberry Snow Rabbit and red strawberry Miaoxiang No.7，thebasic fruit qualityandaroma compoundsofthe two varietiesat the maturitystage were determined in this study.Basicqualitiesincluding singlefruit weight，anthocyanincontent，solublesolidscontent，andtotal phenolicontent were measured. Gas chromatography-mass spectrometry（GC-MS）was employed to detect volatilecompounds in the fruitsof thetwostrawberryvarieties.TheresultsshowedthatthefruitshapeindexofMiaoxiangNo.7was1.41，thefruitwas

longconicalinshape，whilethefruitshapeindexofSnow Rabbit was1.15，and the fruitwasshort conical in shape. The total phenolic content and anthocyanin content of Miaoxiang No.7 were 4.10mg/g and 1.21mg/g ，respectively，both were significantly higher than those of Snow Rabbit.A total of 471 metabolitesin15 categorieswere detected in the two strawberry cultivars，of which117 were upregulated，24weredown-regulated，and 96weredifferentiallyexpressed metabolites，accounting for 20.38% ofthe

totalmetabolites.Theeightdiferentialmetaboliteswithhighquantitieswerealcohols，aldehydes，acids，terpenoids，hydro carbons，ketones，heterocycliccompounds，and esters.These compounds were mainlyenriched inthebiosynthetic pathway of terpenoids.Themainvolatilecompoundsin SnowRabbitstrawberry fruitwereesters，whilethosein MiaoxiangNo.7fruit were terpenoids.There were 2O characteristicaroma compounds in Snow Rabbit strawberry，with a herbaceous aroma type， and there were 22 characteristic aroma compounds in Miaoxiang No.7 strawberry，with a fruity aroma type.

Keywords：strawberry；fruit；differential metabolites；aroma substances；quality

草莓（Fragaria × ananassa Duch.）属于蔷薇科（Rosaceae）草莓属（Fragaria）[1]，是多年生草本浆果类果树，其果实通常呈现出鲜艳的红色，然而，除了常见的红色果实之外，也有一部分草莓的果实为白色。（剩余12387字）