通过能量色散X射线微分析检测到化石细胞中可能与生理相关的化学信号。

A chemical signal possibly related to physiology in fossil cells detected by energy dispersive X-ray microanalysis.

作者信息

Wang X

机构信息

State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 Beijing Dong Road, Nanjing 210008, PR China.

出版信息

Tissue Cell. 2006 Feb;38(1):43-51. doi: 10.1016/j.tice.2005.10.003. Epub 2005 Dec 13.

DOI:10.1016/j.tice.2005.10.003

PMID:16352325

Abstract

Energy dispersive X-ray microanalysis (EDXMA) is a widely used tool employed to detect elemental composition and its spatial distribution in a sample without causing damage. Charcoalified cytoplasm is a new type of fossil material that came to people's attention only recently. In this paper, EDXMA is used for the first time to detect the spatial elemental distribution in charcoalified cytoplasm of two fossil plants that are more than 100 million years old. The results demonstrate certain elemental distribution patterns within charcoalified cytoplasm and the surrounding cell walls. Based on the results from cytological studies of extant material, the heterogeneous spatial elemental distribution within the charcoalified cytoplasm has the potential to be related to the maturation of cells, the presence of certain organelles, and the physiology of these organelles. This is the first chemical signal detected in cytoplasm residue that can possibly be related to plant physiology. This paves the way for further research on fossil cytoplasm, which will better our understanding on the physiology of fossil plants.

摘要

能量色散X射线微分析（EDXMA）是一种广泛使用的工具，用于检测样品中的元素组成及其空间分布，且不会造成损害。炭化细胞质是一种新型化石材料，直到最近才引起人们的关注。在本文中，首次使用EDXMA检测了两种距今一亿多年的化石植物炭化细胞质中的空间元素分布。结果表明，在炭化细胞质和周围细胞壁内存在特定的元素分布模式。基于对现存材料的细胞学研究结果，炭化细胞质内异质的空间元素分布可能与细胞成熟、某些细胞器的存在以及这些细胞器的生理学有关。这是在细胞质残余物中检测到的第一个可能与植物生理学相关的化学信号。这为进一步研究化石细胞质铺平了道路，将有助于我们更好地理解化石植物的生理学。