李仁成^1,2,,
温梦丹¹,
陶欣悦¹,
刘奕志¹,
李成¹
1. 桂林理工大学地球科学学院, 广西 桂林, 541004
2. 广西隐伏金属矿产勘查重点实验室, 广西 桂林, 541004

基金项目: 国家自然科学基金项目（批准号：41867058）、广西自然科学基金项目（批准号：2016GXNSFAA380114）及广西隐伏金属矿产勘查重点实验室共同资助


详细信息

作者简介: 李仁成, 男, 47岁, 教授, 第四纪地质学与生态地质学, E-mail:lirencheng_xie@163.com

中图分类号: P593;Q914.3;Q913.84

收稿日期:2019-05-30
修回日期:2019-10-30
刊出日期:2020-01-30

Advance of study on chemical composition of phytolith

Li Rencheng^1,2,,
Wen Mengdan¹,
Tao Xinyue¹,
Liu Yizhi¹,
Li Cheng¹
1. College of Earth Science, Guilin University of Technology, Guilin 541004, Guangxi
2. Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin 541004, Guangxi


MSC: P593;Q914.3;Q913.84

--> Received Date: 30 May 2019
Revised Date: 30 October 2019
Publish Date: 30 January 2020


摘要
摘要:现代植物植硅体化学组成研究有利于揭示植硅体的化学组成与细胞形态、植物种类及植物生长环境之间的关系，认识植硅体形成机制、植物分类及生态意义。植硅体化学组成测试方法多种多样，主要涉及植硅体化学元素组成及Si、O和C元素同位素组成测定，研究表明植硅体主要含二氧化硅和水，封闭有少量的有机成分及多种矿质元素。在植硅体封闭有机成分存在形式，部分元素的形成、迁移等循环机理，稳定碳同位素组成、分布及其生态指示意义以及¹⁴C测年研究等方面取得一定认识。植物种类、组织部位、细胞微环境以及植物生长的环境因子能够影响植硅体的化学组成。植硅体化学组成研究对植硅体形成机制及碳、硅等元素循环具有重要意义，植硅体部分化学元素、植硅体稳定同位素组成及¹⁴C测年具有较好的古环境及考古研究潜力。现代植物植硅体化学组成及其与环境因子的关系，以及植硅体电子探针微区研究有待于进一步深入开展。
关键词: 植硅体/
碳同位素/
化学组成/
古环境

Abstract:The study on chemical compositions of modern plant phytoliths is helpful to reveal the relationships between the chemical composition of phytoliths and cell morphology, plant species and plant growth environment, and to understand the mechanism of phytolith formation, plant classification and ecological significance. The measurement technologies and methods of phytolith chemical composition are various and involved in major chemical elements and isotopic compositions of Si, O and C. The test results showed SiO₂ and H₂O form the basis of phytolith, few organic components and various inorganic mineral elements are occluded in phytolith. Some achievements were got on the existing form of organic components, the cycle (deposition, migration) mechanism of some elements occluded in phytolith, the compositions and distributions of carbon isotope in phytolith and their ecological indicative significance, and ¹⁴C age of phytolith. The chemical compositions of phytoliths are influenced by plant species and plant tissue parts, the cellular micro-environment which phytoliths are deposited, and by plant growing conditions. The study of phytolith chemical composition is significant to understand the mechanisms of phytolith, and the natural cycle of Si, C and other elements related to phytolith. Some chemical elements, stable isotope compositions of phytoliths, and ¹⁴C age of phytolith are potential stools for paleoenvironmental reconstruction and archaeological research. The investigation of chemical compositions of phytoliths from modern plants and their relationship with environmental conditions which phytoliths formed, and the electron probe microanalysis (EPMA) of phytoliths are necessary to be further developed.
Key words:phytolith/
carbon stable isotope/
chemical composition/
paleoenvironment



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