不同浸水时间对大豆种子发芽的影响

《不同浸水时间对大豆种子发芽的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、南方农业学报JOURNALOFSOUTHERNAGRICULTUREISSN2095—1191；CODENNNXAABDOI：10．3969／j：issn．2095—1191．2013．12．1981不同浸水时问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(广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11号大豆种子在不同浸水时间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】以去离子水浸泡12～168hA，分别测定浸泡溶液电导性及种子的发芽势、出苗率和正常苗率等。【结果】浸水处

2、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和一0．811，达极显著负相关。此外，桂春11号的发芽势、正常苗率均显著高于桂春8号。【结论】桂春l1号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豆耐浸水种质资源的指标，发芽势、正常芽

3、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，GuangxiAcademyofAgriculturalSc

4、iences，Nanning530007，China)Abstract：【Objective】TheresponsesofGuichun8andGuichun11indiferentsoakingdurationswerestudiedtoin—vestigatethescreeningtechniqueforsoybeanseedfloodingtolerance．【Method】Twovarietieswerefloodedfor12-168hindeionizedwater．Theelectricalconductivityofsoybea

5、nsoakingliquid，germinationenergy，germinationpercentageandnormalseedingpercentageweredetected．【Resuh】Soakingtreatmentwasdisastrousforsoybeanseed，whichmadeseedskinmelt，internalsolublesubstancespill，euphylladie，badspotappearincotyledon，growingpointvanish，mainroothurtandadventiti

6、ousrootgrow．Undermoreseriouscircumstances，rootgrowthwasterminatedandthegeotropismofpar-tialseedsdisappeared．Asthetreatmenttimeprolonged，electricalconductivitywasincreased，howevergerminationener—gy，germinationpercentageandnormalseedingpercentageweregraduallydecreased．Thecoefic

7、ientofassociationbetweenelectricalconductivityandotherthreeindexeswas-0．823，一0．854and一0．811，respectively，whichpresentedextremelynegativecorrelation．ThegerminationenergypercentageandnormalseedingpercentagedataofGuichun11weresignifi—cantlyhigherthanthoseofGuichun8．【Conclusion]T

8、hefloodingtoleranceabilityofGuichun11wasbetterthanGuichun8inthisexpe