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.

全国土壤中的磷(P)供应不足，限制了澳大利亚景观中的植物生产，以及世界上许多热带森林。缺乏磷如何限制光合能力仍然是一个谜。我们将确定澳大利亚植物如何在叶片和土壤中磷浓度较低的情况下实现高磷利用效率。我们将综合植物如何在低磷可用性下保持生产力的知识，并告知全球模型如何表示磷的生物地球化学和光合作用，以提高c循环的估计。对植物光合作用和节约磷机制的理解将有助于改善生态模型和加强初级生产管理。