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1、植物营养与肥料学报2006,12(3):346-351PlantNutritionandFertilizerScience不同水分条件下水稻根解剖结构的比较分析封克,司江英,汪晓丽,盛海君(扬州大学江苏省作物遗传生理重点实验室,江苏扬州225009)摘要:在旱作和淹水两种培养方式下,研究了5种基因型水稻(OryzasativaL.)(常规粳稻、杂交粳稻、常规籼稻、杂交籼稻和旱稻)幼苗根系解剖结构的差异。结果表明,两种水分条件下,水稻根通气组织的形成和皮层厚壁细胞的形态均存在基因型差异。5种基因型间,淹水条件下杂交粳稻根形成通气组织的时间最晚,根皮层厚
2、壁细胞形态上的差异在常规粳稻和常规籼稻之间表现得更为明显;旱作条件下旱稻的根通气组织形成较其他基因型晚,常规粳稻根皮层厚壁细胞排列疏松,细胞壁加厚程度小。与淹水条件相比,旱作条件下杂交稻根通气组织形成较迟,常规粳稻根皮层厚壁细胞排列较疏松。关键词:水稻;根解剖结构;土壤水分中图分类号:S511062文献标识码:A文章编号:1008-505X(2006)03-0346-06ComparativeanalysisonricerootanatomicalstructureunderdifferentsoilmoistureFENGKe,SIJ
3、iangying,WANGXiaoli,SHENGHaijun(JiangsuProvuncialKeyLaboratoryofCropGeneticsandPhysiology,YangzhouUniv.,Yangzhou,Jiangsu225009,China)Abstract:Thedifferentiaeofrootanatomicalstructuresoffivedifferentricegenotypes(conventionalIndica,hybridIndica,conventionalJaponica,hybridJap
4、onica,uplandrice)werestudiedunderinundatoryandaerobicconditions.Resultsshowedthatthereexistedgenotypedifferenceontheeffectsofsoilmoistureonaerenchymaformationandsclerenchymatouscellshapeofricerootsamongdifferentcultivars.Underinundatoryconditionaerenchymainhybridjaponicarootoc
5、curredlatestwithinthesefivegenotypes.Cortexsclerenchymatouscellsinconventionalindicarootwereobviouslydifferentfromthoseinconventionaljaponicarootintermsofmorphologicaltraits.Thesecellsinconventionaljaponicarootarrayedtightlyandcellwallslignifiedtoagreatextent.Whereasthoseincon
6、ventionalindicarootformedlooselyandcellwallslignifiedless.Underaerobiccondition,theformationofrootaerenchymaofuplandricewasthelatestamongfivericegenotypes.Andcortexsclerenchymatouscellsinconventionaljaponicarootarrangedloosely.Comparedwithinundatorycondition,aerobicconditionre
7、tardedtheformationofaerenchymaofhybridricerootsandmadethecortexsclerenchymatouscellsarraylooselyinconventionaljaponicaroot.Keywords:rice;rootanatomicalstructure;soilmoisture[3]随着近年来水稻旱作实践的开展,对水分条件钊等通过比较不同水分条件下水稻根半径、皮层影响水稻生长发育和产量的研究已成为热点。大部厚度、中柱大小及导管数目发现,新式旱育秧根的总分研究者基于不同水分条件下
8、水稻的生理特性及根吸收面积和输水组织的横切面最大。卢布和周殿[1-2][4]外部形态来探讨节水栽培的适宜措施
