Theory and tests for coordination among hydraulic and photosynthetic traits in co-occurring woody species

IF 8.1 1区 生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-07-24 DOI:10.1111/nph.19987
Shubham S. Chhajed, Ian J. Wright, Oscar Perez-Priego
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共生木本植物的水力和光合特性之间协调的理论和测试。
共生植物的水力和光合特性差异很大。在这里,我们扩展了 "最低成本 "最优理论,以预测关键水力特征的变化如何潜在地影响光合作用中获取和使用水分的成本,以及这反过来又如何驱动光合作用特征的变化。我们对澳大利亚东部温带林地的 18 种木本植物进行了测试,重点研究了代表植物水分平衡不同方面的水力特征,即储水(边材电容,CS)、供求(枝叶与边材面积比,AL :AS和叶:边材质量比以及ML :MS)、对土壤水分的获取(以黎明前叶片水势ΨPD 表示)和物理强度(边材密度 WD)。AL :AS较高的物种在光合作用期间叶片内部与环境二氧化碳浓度之比(ci : ca)较高,这是最低成本理论框架的核心特征。CS 和组织水势(ΔΨ)的日工作范围对 ci : ca 有交互影响。CS、WD 和 ΨPD 之间存在显著的相关性。这些结果以及多元分析的结果都强调了叶片:边材分配(AL:AS)和储水(CS)在植物水力和光合系统协调中的关键作用。这项研究以最优性理论为基础,独特地探讨了水力特征在预测物种光合作用特异性变化中的作用,并强调了植物碳水平衡中的重要机理联系。
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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍: New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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