Leaf phenology and paleoclimatic and paleoenvironmental insights derived from Yiwupitys elegans of the Yiwu Jurassic Forest, Xinjiang, China

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-08-16 DOI:10.1016/j.revpalbo.2024.105176

Xu-Dong Gou , Qun Sui , Hai-Bo Wei , Ji-Yuan Yang , Yu Zhou , Zhuo Feng

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Abstract

Many permineralized conifer stems and trunks have been documented from the Jurassic strata of the Xinjiang Uygur Autonomous Region (Xinjiang), Northwest China. Xylem anatomical studies have showed that these stems and trunks belonged to a diverse range of plants. However, the leaf phenology and the paleoclimatic and paleoenvironmental significance of these fossil plants have rarely been studied. We quantitatively analyzed the anatomical characteristics of a permineralized conifer stem—Yiwupitys elegans Gou et Feng 2023—from the Middle Jurassic Xishanyao Formation in northeastern Xinjiang, which has distinct and wide growth rings in the secondary xylem. Analyses of the Mean Sensitivity and Ring Markedness Index of the growth rings suggest that a stable paleoclimate with regular seasonal fructifications likely prevailed during the Middle Jurassic in this area. The statistical analyses of cell diameters and anatomical features of leaf traces in six successive growth rings indicate that this fossil plant was deciduous. Our study elucidates the ecophysiological characteristics of a Middle Jurassic conifer plant and provides new insights into the corresponding paleoclimate and paleoenvironment based on quantitative cellular analysis of the fossil stem.

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从中国新疆伊吾侏罗纪森林中的Yiwupitys elegans得出的叶片物候以及古气候和古环境启示

在中国西北部新疆维吾尔自治区（新疆）的侏罗纪地层中，记录了许多针叶树的茎干。木质部解剖学研究表明，这些茎干属于多种植物。然而，对这些化石植物的叶片物候学及其古气候和古环境意义的研究却很少。我们定量分析了新疆东北部中侏罗世西山窑地层中的一株过矿化针叶树茎干-Yiwupitys elegans Gou et Feng 2023的解剖特征，该茎干的次生木质部具有明显而宽的生长年轮。对生长年轮的平均灵敏度和年轮标记度指数的分析表明，该地区在中侏罗世时期可能存在着稳定的古气候和有规律的季节性果化。对六个连续生长年轮的细胞直径和叶痕解剖特征的统计分析表明，这种化石植物是落叶植物。我们的研究阐明了中侏罗世针叶植物的生态生理特征，并根据对化石茎干的定量细胞分析，对相应的古气候和古环境提供了新的见解。

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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.