Coordination of plant organ development through hormonal interaction

豌豆（Pisum sativum L.）是双子叶植物器官发育协调性研究的模式物种;特别是，种子在果实生长过程中的作用以及幼苗早期生长过程中胚轴和子叶之间的相互作用。 在这两个发育过程中，一个组织的正常生长和发育取决于相关的组织（种子是果皮生长所需的，子叶是胚轴生长所需的）。 使用我们的实验系统的数据，我们已经开发了工作假说的作用，植物激素在这些组织之间的生长和发育的协调。 在果实中，我们的数据表明，种子来源的生长素，4-Cl-IAA，被运送到果皮，在那里它刺激赤霉素（GA）的生物合成，从而生长。在萌发幼苗中，我们发现胚轴是刺激子叶中GA生物合成所必需的。 在这两个系统中，我们的工作是该领域的先驱，并导致了独特的工作假设的发展，以解释激素在组织生长和发育协调中的作用。

Pea (Pisum sativum L.) is a model dicotyledonous species for studying the coordination of organ development; specifically, the role of seeds during fruit growth and the interplay between the embryos axis and cotyledons during early seedling growth. In both developmental processes, the normal growth and development of one tissue is dependent on the associated tissue (the seeds are required for pericarp growth and the cotyledons are required for embryo axis growth). Using data from our experimental systems, we have developed working hypotheses on the role of plant hormones in the coordination of growth and development between these tissues. In the fruit, our data suggest that the seed-derived auxin, 4-Cl-IAA, is transported to the pericarp where it stimulates gibberellin (GA) biosynthesis and thereby growth. In the germinating seedling, we found that the embryo axis is required for stimulation of GA biosynthesis in the cotyledons. In both systems, our work is pioneering in the field and has lead to the development of unique working hypotheses to explain the role of hormones in coordination of tissue growth and development.