Feast or famine: how Australian plants stay productive under low phosphorus

盛宴还是饥荒：澳大利亚植物如何在低磷条件下保持生产力

• 批准号: DP210100115
• 负责人: Prof David Ellsworth
• 金额: $ 28.04万
• 依托单位: Western Sydney University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2021
• 资助国家: 澳大利亚
• 起止时间: 2021-01-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP210100115
• 关键词: Feast; famine; how; Australian; plants

Phosphorus (P) is in low supply in soils around the nation, and limits plant production in the Australian landscape, as well as for many tropical forests worldwide. How scarce P restricts photosynthetic capacity has remained elusive. We will determine how Australian plants achieve high phosphorus-use efficiency despite low P concentrations in leaves and soils. We will synthesise knowledge of how plants maintain productivity with low P availability, and inform global models how to represent P biogeochemistry and photosynthesis to improve C-cycle estimates. The understanding of plant photosynthetic and P-saving mechanisms that emerge should provide benefits through improved ecological models and enhanced management of primary production.

全国土壤中磷 (P) 的供应量较低，限制了澳大利亚以及世界各地许多热带森林的植物生产。磷的稀缺如何限制光合作用能力仍然难以捉摸。我们将确定澳大利亚植物如何在叶子和土壤中磷浓度较低的情况下实现高磷利用效率。我们将综合了解植物如何在低磷利用率的情况下保持生产力，并告知全球模型如何表示磷生物地球化学和光合作用，以改进碳循环估计。对植物光合作用和节磷机制的理解应该通过改进生态模型和加强初级生产管理来带来好处。