Contrasting drought tolerance traits of woody plants is associated with mycorrhizal types at the global scale

IF 8.1 1区生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-09-05 DOI:10.1111/nph.20097

Xiaorong Liu, Kailiang Yu, Hui Liu, Richard P. Phillips, Pengcheng He, Xingyun Liang, Weize Tang, César Terrer, Kimberly A. Novick, Emily P. Bakpa, Min Zhao, Xinbo Gao, Yi Jin, Yin Wen, Qing Ye

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Abstract

It is well-known that the mycorrhizal type of plants correlates with different modes of nutrient cycling and availability. However, the differences in drought tolerance between arbuscular mycorrhizal (AM) and ectomycorrhizal (EcM) plants remains poorly characterized.
We synthesized a global dataset of four hydraulic traits associated with drought tolerance of 1457 woody species (1139 AM and 318 EcM species) at 308 field sites. We compared these traits between AM and EcM species, with evolutionary history (i.e. angiosperms vs gymnosperms), water availability (i.e. aridity index) and biomes considered as additional factors.
Overall, we found that evolutionary history and biogeography influenced differences in hydraulic traits between mycorrhizal types. Specifically, we found that (1) AM angiosperms are less drought-tolerant than EcM angiosperms in wet regions or biomes, but AM gymnosperms are more drought-tolerant than EcM gymnosperms in dry regions or biomes, and (2) in both angiosperms and gymnosperms, variation in hydraulic traits as well as their sensitivity to water availability were higher in AM species than in EcM species.
Our results suggest that global shifts in water availability (especially drought) may alter the biogeographic distribution and abundance of AM and EcM plants, with consequences for ecosystem element cycling and ultimately, the land carbon sink.

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在全球范围内，木本植物不同的耐旱特性与菌根类型有关。

众所周知，植物的菌根类型与不同的养分循环和供应模式有关。然而，人们对丛生菌根（AM）植物和外生菌根（EcM）植物之间耐旱性的差异仍然知之甚少。我们综合了 308 个野外地点 1457 种木本植物（1139 种 AM 树种和 318 种 EcM 树种）与耐旱性相关的四种水力特征的全球数据集。我们比较了AM和EcM物种的这些特征，并将进化历史（即被子植物与裸子植物）、水供应（即干旱指数）和生物群落作为额外因素加以考虑。总之，我们发现进化史和生物地理学影响了不同菌根类型之间水力特征的差异。具体来说，我们发现：（1）在潮湿地区或生物群落中，AM 被子植物的耐旱性低于生态被子植物，但在干旱地区或生物群落中，AM 裸子植物的耐旱性高于生态裸子植物；（2）在被子植物和裸子植物中，AM 物种的水力特征变异及其对水分供应的敏感性均高于生态物种。我们的研究结果表明，全球水供应量的变化（尤其是干旱）可能会改变AM和EcM植物的生物地理分布和丰度，从而对生态系统的元素循环产生影响，并最终影响陆地碳汇。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.