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OVER- EXPRESSION OF AN AUX1 HOMOLOG TRIGGERS OVARY INITIATION IN VITRO OF POPULUS TOMENTOSA CARR.
作者姓名:FAN  Jin-hui  CHEN  Jing  LI  Jing  GUO  Wei  ZHANG  Xian-sheng
作者单位:1 College of Forestry,Shandong Agricultural University,Taian 271018,P.R.China2.College of Life Science,Shandong Agricultural University,Taian 271018,P.R.China
基金项目:ShanDong Provincial Education Department Supported Item(no.J07YF08)
摘    要:INTRODUCTIONPolar transport is one key feature of auxin action was believed as a positional signal plays a wide arrange ofroles in plantgrowth and development,such as the gravity response1],the initiation of lateral roots2],positiondetermination of leaf primordial3,4],differentiation of flower primordial5],the axis formation in developingembryos6~8],the patterned differentiation of vascular tissues9~11].Polar auxin transport(PAT)system contributes indole-3-acetic acid(IAA)thorough …

关 键 词:过表达  子房  PtAUX1  生长素极性运输  毛白杨  花发育
文章编号:1000-2324(2007)04-0501-08
收稿时间:2006-05-27
修稿时间:2006年5月27日

OVER- EXPRESSION OF AN AUX1 HOMOLOG TRIGGERS OVARY INITIATION IN VITRO OF POPULUS TOMENTOSA CARR.
FAN Jin-hui CHEN Jing LI Jing GUO Wei ZHANG Xian-sheng.OVER- EXPRESSION OF AN AUX1 HOMOLOG TRIGGERS OVARY INITIATION IN VITRO OF POPULUS TOMENTOSA CARR.[J].Journal of Shandong Agricultural University,2007,38(4):501-508.
Authors:FAN Jin-hui  CHEN Jing  LI Jing  GUO Wei  ZHANG Xian-sheng
Abstract:PtAUX1, an ortholog of Arabidopsis AtAUX1 ( encoding auxin influx carrier protein), has been cloned from Populus tomentosa. PtAUX1 protein is similar to Arabidopsis AtAUX1 in structure, but PtAUX1 contains an additional cAMP/cGMP - dependent protein kinase phosphorylation site. Its overexpression lines driven by 35S promoter exhibits a novel phenotype related flower development which has not been revealed in AtAUX1 mutants. Ovary - like structures each with 1 ~ 2 styles, but without a cup - like disc and a bract, can initial from regenerated transgenic bud in cluster,resembling an inflorescence. The histological dissections illuminate that the ovary - like structures have womb and transmitting tissue inner its styles, but no ovules. PtAUX1 expression pattern are ubiquitous and various in different organs,which is coincident with its candidate auxin influx, functioning in distributing auxin thorough a plant body. These results suggest that PtAUX1 or polar auxin transport has a substantial function in floral organ initiation.
Keywords:Populus  Flower development  Polar auxin transport  Over expression  PtAUX1
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