首页|The worldwide allometric relationship in anatomical structures for plant roots

The worldwide allometric relationship in anatomical structures for plant roots

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The cortex(i.e.,absorptive tissue)and stele(transportive vascular tissue)are fundamental to the function of plant roots.Unraveling how these anatomical structures are assembled in absorptive roots is essential for our understanding of plant ecology,physiology,and plant responses to global environmental changes.In this review,we first compile a large data set on anatomical traits in absorptive roots,including cortex thickness and stele radius,across 698 observations and 512 species.Using this data set,we reveal a common root allometry in absorptive root structures,i.e.,cortex thickness increases much faster than stele radius with increasing root diameter(hereafter,root allometry).Root allometry is further validated within and across plant growth forms(woody,grass,and liana species),mycorrhiza types(arbuscular mycorrhiza,ectomycorrhiza,and orchid mycorrhizas),phylogenetic gradients(from ferns to Orchid-aceae),and environmental change scenarios(e.g.,elevation of atmospheric C02 concentration and ni-trogen fertilization).These findings indicate that root allometry is common in plants.Importantly,root allometry varies greatly across species.We then summarize recent research on the mechanisms of root allometry and potential issues regarding these mechanisms.We further discuss ecological and evolu-tionary implications of root allometry.Finally,we propose several important research directions that should be pursued regarding root allometry.

Allometric relationshipRoot dimeterCortex thicknessStele radius

Yue Zhang、Jing-Jing Cao、Qing-Pei Yang、Ming-Zuo Wu、Yong Zhao、De-Liang Kong

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College of Forestry,Henan Agricultural University,Zhengzhou 450002,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Funding for Characteristic and Backbone Forestry Discipline Group of Henan ProvinceScientific Research Foundation of Henan Agricultural UniversityResearch Funds for overseas returnee in Henan Province,China

3217174642077450318705223167055030500854

2023

10.1016/j.pld.2023.05.002

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCDCSCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2023.45(6)
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