水杨酸对低温和盐胁迫下油菜种子萌发的缓解效应

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中图分类号：S634.3 文献标志码：A 文章编号：1673-2871（2026）01-201-07

Abstract：To investigate thealleviativeeffects ofsalicylicacid（SA）priming ontheseed germinationofrapeseed（Brassica napusL.）under abiotic stress，this studyutilized seedsof thecultivar Zhongshuang No.11.Aseed germination incubator was employed forthe germinationtrials.Seeds were primed with SAat sixconcentration gradients：O（CK），0.2，0.4， 0.6， 0.8， and 1.0mmol⋅L-1 .The primed seeds were placed in a seed germination chamber to germinate under low-temperature stress （ 13∘C and salt stress（120 mmol L-1ΔNaCl） ，respectively，and the germination percentage， germination energy， germinationindex，germinationvigorof theseeds，andshoot length，plumule length，radicle length，fresh ma，anddry masswere determined.Theresultsdemonstrated that seed primingwith 0.2mmol⋅L-1 SAsignificantly enhanced keygermination parameters compared to the CK.This improvement was observed in germination percentage， germination energy，germination index，germinationvigorof theseeds，andshoot length，plumule length，radicle length，freshmass，and dry mass under both low-temperature and salt stress conditions.At the concentrations of 0.8 and 1.0mmol⋅L-1 ，SA treatmentaggravatedtheeffectsoflow-temperatureandsaltstressesonall seed germinationindicatorsofrapeseed（exceptfor radicle length under salt stress），with the aggravating effects becoming more pronouncedas the concentration increased. Therefore，theoptimalconcentrationofSApriming foreectielyaleviating thecombineddetrimentaleffectsoflow-temperature and salt stress on rapeseed seed germinationwere determined to be 0.2mmol⋅L-1

KeyWords：Salicylicacid;Abiotic stress;Seed germination;Rapeseed

油菜（BrassicanapusL.）是我国重要的油料和经济作物，不仅是食用油的第一大来源，也是第二大饲用蛋白来源。（剩余9875字）