资源描述:
《高低淀粉木薯品种可溶性糖转运,分配与块根淀粉积累的关系研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、中国农学通报2013,29(33):153-157ChineseAgriculturalScienceBulletin高低淀粉木薯品种可溶性糖转运、分配与块根淀粉积累的关系研究袁圣勇,罗兴录,曾文丹,杨鑫,刘兴淋,梁信子,陈会鲜,吴海宁,樊吴静(广西大学农学院,南宁530005)摘要:为了探讨高低淀粉木薯品种可溶性糖运转、分配与块根淀粉积累的关系,在大田条件下,试验以高低淀粉品种‘辐选01’和‘华南124’为材料,分别在各生育期测定块根淀粉积累量和根茎叶可溶性糖积累量。结果表明,高淀粉品种‘辐选01’茎杆的可溶性糖大部分时期比低
2、淀粉品种‘华南124’高,块根可溶性糖大部分时期比低淀粉品种‘华南124’低;从块根形成初期到成熟期,块根可溶性糖呈明显下降的趋势,而茎和叶的可溶性糖先是随块根淀粉积累速率的升高而下降,后又在淀粉积累速率下降时明显升高,和淀粉积累速率趋势相反。在块根形成初期,可溶性糖的分配是块根积累量大于茎杆,茎杆大于叶片,而在成熟期,块根可溶性糖的积累量小于茎杆,茎杆小于叶片。由此可见,木薯可溶性糖的运转、分配与块根淀粉积累关系密切,高淀粉品种有更强的合成和转化利用可溶性糖的能力,而限制块根淀粉积累的主因是库限制。关键词:木薯;可溶性糖;运转
3、;分配;淀粉积累中图分类号:S533文献标志码:A论文编号:2013-0478StudiesontheRelationshipBetweenSolubleSugar'sTransportation,DistributionandtheStarchAccumulationintheRootTubeofCassavaYuanShengyong,LuoXinglu,ZengWendan,YangXin,LiuXinglin,LiangXinzi,ChenHuixian,WuHaining,FanWujing(CollegeofAgri
4、culture,GuangxiUniversity,Nanning530005)Abstract:Thehighandlowstarchcassavacultivars‘SC124’and‘FuXuan01’werestudiedtherelationshipbetweensolublesugar’stransportation,distributionandtheroot’sstarchaccumulation.Theyweredeterminedroot’sstarchaccumulationandroot,stem,lea
5、fsolublesugaraccumulationinthegrowthperiodrespectivelyinfieldconditions.Theresultsshowedthattheaccumulationofsolublesugarinthehighstarchcassavavariety‘FuXuan01’'sstemwashigherthanthelowstarchcassavavariety‘SC124’inmostofperiodandtheaccumulationofsolublesugarinrootwas
6、lowerthan‘SC124’inmostofperiod.Root’ssolublesugarcontentwasallsignificantlydeclinedtendenciesfromtherootformationintheearlyperiodtomatureperiod.Stemandleaf’ssolublesugarcontentfirstwithrootstarchaccumulationraterose,thenwiththestarchaccumulationratedeclinedalwayssign
7、ificantlyhigher.Theykepttheoppositetrendwithstarchaccumulationrate.Intheearlyrootformation,thedistributionofsolublesugarshowedthatrootaccumulationwasgreaterthanthestem;stemwasgreaterthantheleaf.Butinthematureperiod,rootsolublesugaraccumulationlessthanthestem,thestem基
8、金项目:国家“973”计划课题“木薯淀粉高效积累及关键基因”(2010CB126601);广西自然科学基金重点项目“木薯种质资源创新与高产高粉、耐旱、耐寒品种选育”(2010GXNSFD013025)。第一作者简介:袁圣勇,男,1986年出生,硕士研究生,研究方