Molecular Genetics, Department of Biology, Faculty of Science, Utrecht University, 3584 CH Utrecht, The Netherlands.
Proc Natl Acad Sci U S A. 2013 Jan 15;110(3):1107-12. doi: 10.1073/pnas.1213497110. Epub 2012 Dec 31.
Lateral organ distribution at the shoot apical meristem defines specific and robust phyllotaxis patterns that have intrigued biologists and mathematicians for centuries. In silico studies have revealed that this self-organizing process can be recapitulated by modeling the polar transport of the phytohormone auxin. Phyllotactic patterns change between species and developmental stages, but the processes behind these variations have remained unknown. Here we use regional complementation experiments to reveal that phyllotactic switches in Arabidopsis shoots can be mediated by PLETHORA-dependent control of local auxin biosynthesis.
在茎尖分生组织中,侧生器官的分布决定了特定且稳定的叶序模式,这一现象令生物学家和数学家们着迷了数个世纪。计算机模拟研究表明,通过模拟植物激素生长素的极性运输,这种自组织过程可以被再现。叶序模式在物种和发育阶段之间发生变化,但这些变化背后的过程仍然未知。在这里,我们利用区域互补实验揭示了拟南芥茎尖中的叶序转变可以通过 PLETHORA 依赖的局部生长素生物合成的控制来介导。