叶片极薄,但非常健壮:叶片经济性末端令人惊讶的隐花植物性状组合。

IF 4.6 1区 生物学 Q1 PLANT SCIENCES
Plant Diversity Pub Date : 2024-04-26 eCollection Date: 2024-09-01 DOI:10.1016/j.pld.2024.04.009
Tana Wuyun, Lu Zhang, Tiina Tosens, Bin Liu, Kristiina Mark, José Ángel Morales-Sánchez, Jesamine Jöneva Rikisahedew, Vivian Kuusk, Ülo Niinemets
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引用次数: 0

摘要

叶片经济光谱(LES)描述了叶片结构、化学和生理投资之间的基本权衡。一般来说,结构坚固的厚叶单位面积干重(LMA)较高,单位干重的光合能力(A 重)较低。矛盾的是,"柔弱薄叶 "苔藓和尖叶苔藓的单位干重很低,但由于叶片元素的微小尺寸,它们的单位干重及其组成部分--叶片厚度(LT)和密度(LD)--尚未得到系统的估算。在这里,我们对隐花植物的 LES 及其相关性状进行了前所未有的详细描述,涵盖了五个进化上不同的品系。我们发现,苔藓和尖叶苔藓的 LMA 和 LT 值是陆生植物中最低的。在不同品系的众多物种中,A质量和LD呈负相关。事实上,在所研究的隐花植物中,低 A 质量反映了高 LD 和细胞壁厚度。我们的结论是,进化过程中的古老植物种系通过增加 LD 获得了分化程度低的超薄叶肉。在所有植物品系中,LD 而不是 LMA 是代表叶片坚固性和 LES 生理机能之间权衡的特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extremely thin but very robust: Surprising cryptogam trait combinations at the end of the leaf economics spectrum.

Leaf economics spectrum (LES) describes the fundamental trade-offs between leaf structural, chemical, and physiological investments. Generally, structurally robust thick leaves with high leaf dry mass per unit area (LMA) exhibit lower photosynthetic capacity per dry mass (A mass). Paradoxically, "soft and thin-leaved" mosses and spikemosses have very low A mass, but due to minute-size foliage elements, their LMA and its components, leaf thickness (LT) and density (LD), have not been systematically estimated. Here, we characterized LES and associated traits in cryptogams in unprecedented details, covering five evolutionarily different lineages. We found that mosses and spikemosses had the lowest LMA and LT values ever measured for terrestrial plants. Across a broad range of species from different lineages, A mass and LD were negatively correlated. In contrast, A mass was only related to LMA when LMA was greater than 14 g cm- 2. In fact, low A mass reflected high LD and cell wall thickness in the studied cryptogams. We conclude that evolutionarily old plant lineages attained poorly differentiated, ultrathin mesophyll by increasing LD. Across plant lineages, LD, not LMA, is the trait that represents the trade-off between leaf robustness and physiology in the LES.

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来源期刊
Plant Diversity
Plant Diversity Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.30
自引率
6.20%
发文量
1863
审稿时长
35 days
期刊介绍: Plant Diversity (formerly Plant Diversity and Resources) is an international plant science journal that publishes substantial original research and review papers that advance our understanding of the past and current distribution of plants, contribute to the development of more phylogenetically accurate taxonomic classifications, present new findings on or insights into evolutionary processes and mechanisms that are of interest to the community of plant systematic and evolutionary biologists. While the focus of the journal is on biodiversity, ecology and evolution of East Asian flora, it is not limited to these topics. Applied evolutionary issues, such as climate change and conservation biology, are welcome, especially if they address conceptual problems. Theoretical papers are equally welcome. Preference is given to concise, clearly written papers focusing on precisely framed questions or hypotheses. Papers that are purely descriptive have a low chance of acceptance. Fields covered by the journal include: plant systematics and taxonomy- evolutionary developmental biology- reproductive biology- phylo- and biogeography- evolutionary ecology- population biology- conservation biology- palaeobotany- molecular evolution- comparative and evolutionary genomics- physiology- biochemistry
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