Divergent structural leaf trait spectra in succulent versus non-succulent plant taxa.

IF 3.6 2区生物学 Q1 PLANT SCIENCES

Annals of botany Pub Date : 2024-08-22 DOI:10.1093/aob/mcae093

Giacomo Mozzi, Alan Crivellaro, Davis E Blasini, Marilyn Vásquez-Cruz, Tania Hernández-Hernández, Kevin R Hultine

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引用次数: 0

Abstract

Background and scope: Plant functional traits are the result of natural selection to optimize carbon gain, leading to a broad spectrum of traits across environmental gradients. Among plant traits, leaf water storage capacity is paramount for plant drought resistance. We explored whether leaf-succulent taxa follow trait correlations similar to those of non-leaf-succulent taxa to evaluate whether both are similarly constrained by relationships between leaf water storage and climate.

Methods: We tested the relationships among three leaf traits related to water storage capacity and resource use strategies in 132 species comprising three primary leaf types: succulent, sclerophyllous, and leaves with rapid returns on water investment, referred to as fast return. Correlation coefficients among specific leaf area (SLA), water mass per unit of area (WMA), and saturated water content (SWC) were tested, along with relationships between leaf trait spectra and aridity determined from species occurrence records.

Results: Both SWC and WMA at a given SLA were ~10-fold higher in succulent leaves than in non-succulent leaves. While SWC actually increased with SLA in non-succulent leaves, no relationship was detected between SWC and SLA in succulent leaves, although WMA decreased with SLA in all leaf types. A principal component analysis (PCA) revealed that succulent taxa occupied a widely different mean trait space than either fast-return (P < 0.0001) or sclerophyllous (P < 0.0001) taxa along the first PCA axis, which explained 63 % of mean trait expression among species. However, aridity only explained 12 % of the variation in PCA1 values. This study is among the first to establish a structural leaf trait spectrum in succulent leaf taxa and quantify contrasts in leaf water storage among leaf types relative to specific leaf area.

Conclusions: Trait coordination in succulent leaf taxa may not follow patterns similar to those of widely studied non-succulent taxa.

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多汁植物类群与非多汁植物类群的叶片结构特征光谱存在差异。

背景和范围植物的功能性状是自然选择的结果，目的是优化碳的获取，从而在不同的环境梯度中形成了广泛的性状。在植物性状中，叶片的储水能力对植物的抗旱性至关重要。我们探讨了多叶类群是否与非多叶类群具有相似的性状相关性，以评估两者是否同样受到叶片储水和气候之间关系的制约。我们在 132 个物种中测试了与储水能力和资源利用策略有关的三种叶片性状之间的关系，这些物种包括三种主要叶片类型：多汁叶、硬叶和水分投资回报快的叶片（称为快速回报叶）。测试了比叶面积（SLA）、单位面积水量（WMA）和饱和含水量（SWC）之间的相关系数，以及根据物种出现记录确定的叶片性状光谱与干旱度之间的关系：结论：在给定的 SLA 条件下，多汁叶片的饱和含水量和单位面积饱和含水量比非多汁叶片高出约 10 倍。在非多汁叶片中，SWC实际上随SLA的增加而增加，而在多汁叶片中，SWC与SLA之间没有关系，尽管在所有叶片类型中，WMA随SLA的增加而减少。主成分分析表明，在第一个 PCA 轴上，多汁类群占据的平均性状空间与快速回归类群（P < 0.0001）和硬叶类群（P < 0.0001）差别很大，可以解释物种间 63% 的平均性状表达。然而，干旱只解释了 PCA1 值变化的 12%。这项研究首次在多汁叶类群中建立了叶片结构性状谱，并量化了叶片类型之间相对于特定叶面积的叶片储水对比。研究结果表明，多汁叶类群的性状协调可能与广泛研究的非多汁类群的性状协调模式不同。

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

Annals of botany 生物-植物科学

CiteScore

7.90

自引率

4.80%

发文量

138

审稿时长

3 months

期刊介绍： Annals of Botany is an international plant science journal publishing novel and rigorous research in all areas of plant science. It is published monthly in both electronic and printed forms with at least two extra issues each year that focus on a particular theme in plant biology. The Journal is managed by the Annals of Botany Company, a not-for-profit educational charity established to promote plant science worldwide. The Journal publishes original research papers, invited and submitted review articles, ''Research in Context'' expanding on original work, ''Botanical Briefings'' as short overviews of important topics, and ''Viewpoints'' giving opinions. All papers in each issue are summarized briefly in Content Snapshots , there are topical news items in the Plant Cuttings section and Book Reviews . A rigorous review process ensures that readers are exposed to genuine and novel advances across a wide spectrum of botanical knowledge. All papers aim to advance knowledge and make a difference to our understanding of plant science.

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