黄瓜耐湿冷性鉴定时期和鉴定指标筛选

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中图分类号：S642.2 文献标志码：A 文章编号：1673-2871（2025）07-041-08

Screening of stages and indexes for cucumber wet-cold tolerance identification

DING Yuanyuan， PAN Yupeng，LIU Hanqiang，MENG Huanwen， CHENG Zhihui （CollegeofHorticulture，orthwestA&FUversityYangling7，haniina）

Abstract：Toscreenthestagesandindexes forcucumberwet-coldtoleranceidentification，threestageseedlingsof3cultivars withdifferent wet-coldtolerance，andseedlingsat2leafstageof8diferentwet-coldtolerantcultivars weretreated in growth chamber under wet-cold （9∘C/5 ∘C/5∘C+RH95% ） condition taking 28∘C/18∘C+RH75% as the control. The growth and physiologic indexes of seedlings were colectedandtheir relative values were analyzed.Theresults showed thatwet-cold treatmentsignificantlyinhibitedthegrowthandphysiologicmetabolismofcucumberseedlings，and nduced antioxidant，osmoticregulationandenzyme protectionreactions.Underwet-coldstress，thegrowthandphysiologic indexesofseedlingsat2-leaf，3-leafand4-leafstagecouldbetterindicatethewet-coldtoleranceofthecultivars，butthe2-leaf stagewasbeterforearlyidentification.Basedonclusteranalysis，correlationanalysisandvariationanalysis，plantheight， fresh mass anddry massofseedlings were first recommended inmorphological indexes，followed bystemdiameterand lengthad widthofthefirsttrue leaf.Thecontentofproline，activityofcatalase，stomatalconductance，transpiratiorate， activityofperoxidase，contentof malonaldehydeandconcentrationofintercellarcarbon dioxide were first suggested in physiologicindexes，flowedbyontentofsuperoxideonfredical，electrontransportatetualqantumency non-photochemical quenching coefficient.

Keywords：Cucumber;Wet-cold tolerance; Identification stage; Identification index

黄瓜（CucumissativusL.）是普遍栽培的典型喜温蔬菜，易受冷害，高空气湿度也影响生长发育[2-3]，并诱发病害4。（剩余9511字）