Carboxylate exudation and phosphate nutrition in Hakea prostrata (Proteaecea)

非菌根Proteaceae在从营养贫瘠的土壤中获取磷酸盐方面非常成功；它们的丛生根解释了这一点。它们对磷酸盐毒性也非常敏感。我们将使用Hakea Prostrata(Proteaceae)作为模型，阐明与丛生根功能相关的羧酸盐的产生和释放。将评估受发展和环境信号影响的丛生根渗出的类型和速率。我们的发现将提供与固定磷酸盐土壤中的磷酸盐获取和磷酸盐毒性相关的适应机制的关键信息。

Nonmycorrhizal Proteaceae are very successful in acquiring phosphate from nutrient-impoverished soils; their cluster roots account for this. They are also extremely sensitive to phosphate toxicity. We will elucidate aspects of production and release of carboxylates that are associated with functioning of cluster roots, using Hakea prostrata (Proteaceae) as a model. Types and rates of exudation by cluster roots, as influenced by development and environmental signals, will be assessed. Our findings will provide key information on adaptive mechanisms associated with both phosphate acquisition from phosphate-fixing soils and phosphate toxicity.