Studies on the role of the Arabidopsis gene MONOPTEROS in vascular development and plant cell axialization

被引:20
作者
Przemeck, GKH
Mattsson, J
Hardtke, CS
Sung, ZR
Berleth, T
机构
[1] UNIV MUNICH,LEHRSTUHL GENET,INST GENET & MIKROBIOL,D-80638 MUNICH,GERMANY
[2] UNIV UPPSALA,DEPT PHYSIOL BOT,S-75236 UPPSALA,SWEDEN
[3] UNIV CALIF BERKELEY,DEPT PLANT BIOL,BERKELEY,CA 94720
关键词
Arabidopsis; cell axialization; MONOPTEROS gene; PIN-FORMED gene; polar auxin transport; vascular development;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In the embryo of Arabidopsis thaliana (L.) Heynh., formation of the hypocotyl/root axis is initiated at the early-globular stage, recognizable as oriented expansion of formerly isodiametric cells. The process depends on the activity of the gene MONOPTEROS (MP); Inp mutant embryos fail to produce hypocotyl and radicle. We have analyzed the morphology and anatomy of mp mutant plants throughout the Arabidopsis life cycle. Mutants form largely normal rosettes and root systems, but inflorescences either fail to form lateral flowers or these flowers are greatly reduced. Furthermore, the auxin transport capacity of inflorescence axes is impaired and the vascular strands in all analyzed organs are distorted. These features of the mutant phenotype suggest that the MP gene promotes cell axialization and cell file formation at multiple stages of plant development.
引用
收藏
页码:229 / 237
页数:9
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