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时间:2020-03-27
《不同浸水时间对大豆种子发芽的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
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