不同浸水时间对大豆种子发芽的影响.pdf

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1、南方农业学报JOURNAL0FSOUTHERNAGRICULTUREISSN2095—1191：CODENNNXAABDOI：10．3969／j：issn．2095—1191．2013．12．1981不同浸水时间对大豆种子发芽的影响陈文杰，陈渊，梁江，曾维英，汤复跃，韦清源(f-西农业科学院经济作物研究所，南宁530007)摘要：【目的】观察桂春8号和桂春1l号大豆种子在不同浸水时问处理条件下的受害表现，筛选出大豆种子耐浸水胁迫处理方法。【方法】以去离了水浸泡12～168hA，分别测定浸泡溶液电导性及种子的发芽势、出苗率和正常苗率

2、等。【结果】浸水处理对大豆种子产生严重的危害，浸水后大豆种皮消融，种子内溶物外漏，种子萌芽子叶出现坏斑，部分真叶坏死，生长点消失；根部主根发育受到破坏，长出不定根，严重时根部不能发育，部分种子向地性消失。随着浸水时间的延长，大豆浸泡液电导率不断增加，发芽势、出苗率、正常苗率逐渐降低，浸泡液电导率与发芽势、出苗率、正常苗率的相关系数分别为一0．823、一0．854和-0．811，达极显著负相关。此外，桂春1l号的发芽势、正常苗率均显著高于桂春8号。【结论】桂春1l-g-的耐浸水胁迫能力高于桂春8号。浸泡液电导率可作为大批量初步筛选大

3、豆耐浸水种质资源的指标，发芽势、正常芽率等可作为进一步筛选大豆耐浸水胁迫的指标。关键词：浸水胁迫；大豆；正常苗率；电导率中图分类号：$565．104文献标志码：A文章编号：2095—1191(2013)11-1981—04EffectsofdifferentsoakingdurationsonsoybeanseedgerminationCHENWen-jie，CHENYuan，LIANGJiang，ZENGWei-ying，TANGFu-yue，WEIQing-yuan(CashCropsResearchInstitute，Gua

4、ngxiAcademyofAgficulturalSciences，Nanning530007，China)Abstract：【Objective]TheresponsesofGuichun8andGuichun1indifferentsoakingdurationswerestudiedtoin—vestigatethescreeningtechniqueforsoybeanseedfloodingtolerance．【Method】Twovarietieswerefloodedfor12-168hindeionizedwate

5、r．Theelectricalconductivityofsoybeansoakingliquid，germinationenergy，germinationpercentageandnormalseedingpercentageweredetected．【Result]Soakingtreatmentwasdisastrousforsoybeanseed，whichmadeseedskinmelt，internalsolublesubstancespill，euphylladie，badspotappearincotyledon

6、，growingpointvanish，mainroothurtandadventitiousrootgrow．Undermoreseriouscircumstances，rootgrowthwasterminatedandthegeotropismofpar-tialseedsdisappeared．Asthetreatmenttimeprolonged，electricalconductivitywasincreased，howevergerminationener-gY，germinationpercentageandnor

7、malseedingpercentageweregraduallydecreased．Thecoefficientofassociationbetweenelectricalconductivityandotherthreeindexeswas一0．823，一0．854and一0．811，respectively，whichpresentedextremelynegativecorrelation．ThegerminationenergypercentageandnormalseedingpercentagedataofGuich

8、un1weresignifi-cantlyhigherthanthoseofGuichun8．【Conclusion】ThefloodingtoleranceabilityofGuichun1wasbetterthanGuichun8inthise