BULK CARBON ISOTOPIC VARIABILITY WITHIN LEAVES

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-08-25 DOI:10.2110/palo.2022.001

D. Royer, M. Hren

引用次数: 0

Abstract

Abstract: The stable carbon isotopic composition (δ13C) of fossil leaves is a simple and common measurement that provides information about paleophysiology, paleoecology, and paleoclimate. Variance in δ13C is typically assessed across leaves; comparatively little is known about variance within leaves, a potential source of unquantified uncertainty. Here we systematically analyze the spatial patterns of bulk δ13C in fresh leaves of 10 tree species (two leaves per species; 21 or 22 analyses per leaf). We find that samples containing midvein tissue are markedly higher in δ13C than non-midvein tissue from the same leaf (median = +0.85‰), with samples containing only midvein tissue offset by as much as +3.01‰. The non-midvein samples are less variable—the typical range within a single leaf is <1‰—and do not show any consistent spatial patterns. In cases where whole fossil leaves cannot be analyzed, we recommend sampling as many randomized areas without major veins as is feasible.

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叶片内总体碳同位素变异

摘要：树叶化石的稳定碳同位素组成（δ13C）是一种简单而常见的测量方法，可以提供有关古生理、古生态和古气候的信息。δ13C的变化通常通过叶片进行评估；人们对叶片内部的方差知之甚少，这是一个潜在的不确定性来源。在这里，我们系统地分析了10个树种新鲜叶片中体积δ13C的空间模式（每个物种两片叶片；每个叶片21或22次分析）。我们发现，含有中脉组织的样本的δ13C明显高于同一叶片的非中脉组织（中位数=+0.85‰），仅含有中脉的样本偏移了3.01‰。非中脉样本的变化较小，单个叶片内的典型范围<1‰，并且没有显示出任何一致的空间模式。在无法分析整个化石叶子的情况下，我们建议尽可能多地对没有主脉的随机区域进行采样。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.