Modeling auxin transport and plant development
Modeling auxin transport and plant development
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DOI：
10.1007/s00344-006-0066-x
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发表时间：
2006-12-01
影响因子：
4.8
通讯作者：
Jonsson, H.
中科院分区：
文献类型：
--
作者：
Heisler, M. G.;Jonsson, H.
植物激素生长素在植物发育中起着至关重要的作用。其功能的核心是其在植物组织中的分布，而植物组织又主要由细胞间极性运输过程形成。生长素转运依赖于扩散摄取以及通过流入和流出载体的载体介导的转运。数学模型已被用来完善我们的理论理解这些过程，并测试新的假设，关于本地化的外排载体，了解生长素图案在组织水平。在这里，我们审查模型生长素运输和它们如何被应用到图案化过程中，包括植物脉管系统和原基定位的阐述。第二，我们研究了生长素流入载体，如AUX 1在图案生长素在茎分生组织中的可能作用。我们发现，AUX 1和它的亲戚可能发挥至关重要的作用，在维持高生长素水平的分生组织表皮。我们还表明，生长素流入载体可能发挥重要作用，稳定生长素的生长素梯度型模型的叶序分布格局。
The plant hormone auxin plays a critical role in plant development. Central to its function is its distribution in plant tissues, which is, in turn, largely shaped by intercellular polar transport processes. Auxin transport relies on diffusive uptake as well as carrier-mediated transport via influx and efflux carriers. Mathematical models have been used to both refine our theoretical understanding of these processes and to test new hypotheses regarding the localization of efflux carriers to understand auxin patterning at the tissue level. Here we review models for auxin transport and how they have been applied to patterning processes, including the elaboration of plant vasculature and primordium positioning. Second, we investigate the possible role of auxin influx carriers such as AUX1 in patterning auxin in the shoot meristem. We find that AUX1 and its relatives are likely to play a crucial role in maintaining high auxin levels in the meristem epidermis. We also show that auxin influx carriers may play an important role in stabilizing auxin distribution patterns generated by auxin-gradient type models for phyllotaxis.