Carboxylate exudation and phosphorus acquisition in eucalypts

桉树中的羧酸盐渗出和磷吸收

• 批准号: DP230101190
• 负责人: Em/Prof Johannes (Hans) Lambers
• 金额: $ 36.99万
• 依托单位: The University of Western Australia
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2023
• 资助国家: 澳大利亚
• 起止时间: 2023-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP230101190
• 关键词: Carboxylate; exudation; phosphorus; acquisition; eucalypts

Eucalypts are thought to rely on mycorrhizas to acquire phosphorus (P). Using leaf manganese concentrations in the field to proxy rhizosphere carboxylates, followed by plant growth in low P-solutions, it was shown that some, but not all eucalypts that grow on P-impoverished soils release carboxylates from their roots. This trait is a strategy of Proteaceae to access soil P, but assumed not to be used by eucalypts. This game-changing discovery challenges the current dogma that eucalypts invariably rely on mycorrhizas to acquire P. This project will explore the significance of this newly-described trait for functioning of eucalypts more broadly and produce results that are important for conservation, restoration and forestry activities.

桉树被认为是依靠菌根获得磷（P）。使用叶锰浓度在该领域代理根际羧酸盐，其次是植物生长在低P-解决方案，它表明，一些，但不是所有的euclitts生长在P-贫瘠的土壤释放羧酸根。这一特性是山龙眼科植物获取土壤磷的一种策略，但被认为不被真核生物利用。这一改变游戏规则的发现挑战了目前的教条，即真核生物总是依赖于菌根来获得P.该项目将更广泛地探索这种新描述的特性对真核生物功能的重要性，并产生对保护，恢复和林业活动非常重要的结果。