高温对现生植物细胞质的影响  

THE IMPACT OF HIGH TEMPERATURE ON LIVING PLANT CYTOPLASM

作　　者：李楠 邓焕祥 张文虎[1,2] 杜开和[3] 王鑫 

机构地区：[1]深圳市中科院仙湖植物园,深圳518004 [2]广东省农业科学院农业生物基因研究中心,广州510640 [3]南京师范大学生命科学院,江苏省药物超分子材料及应用省级重点实验室,南京210046 [4]中科院南京地质古生物研究所古植物和孢粉研究室及现代古生物学和地层学国家重点实验室,南京210008

出　　处：《古生物学报》2013年第4期484-491,共8页Acta Palaeontologica Sinica

基　　金：the National Basic Research Program of China (973 Program 2012CB821901)；Team Program of Scientific Innovation and Interdisciplinary Cooperation, CAS (2013-2015)；Chinese Academy of Sciences (KZCX2-YW-154).

摘　　要：通常的理解中,植物细胞质是活跃而不稳定的。这种概念使得人们对于植物化石形成一个固定的认识,即植物细胞质是不能保存为化石的。但是这种想法正在面临着日益增长的植物化石超微结构研究的挑战。虽然人们曾提出了包括高温在内的多个植物细胞质化石保存机制,但是用现代植物材料进行相关模拟的实验或研究却并不多见。本文模拟高温在植物化石化中的作用,通过不同的温度和处理条件的组合,用光镜、扫描电镜、透射电镜观察结果证明,高温是使植物细胞质降解过程停止的机制之一。这个结果表明,对植物细胞质化石研究的潜力远比人们过去认识的大得多。Plant cytoplasm is usually thought to be active and labile, and this conception leads to the widely ac- cepted stereotypic thinking about plant fossils; their cytoplasm cannot be preserved. However, such thinking is facing increasing challenges from new evidence of ultrastructures preserved in plant fossils. Various mechanisms, including high temperature, have been proposed for the preservation of cytoplasm in plant fossils, but related research using living plant for simulation studies is still sparse. Here we attempt to simulate the effects of high temperature on plant cytoplasm during fossilization. By various temperature and processing combinations we confirm, using light microsco py （LM）, scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）, that high tempera- ture is one of the mechanisms that stop cytoplasm from decaying. The results suggest that the potential for successful research on fossil plant cytoplasm is much greater than commonly assumed.

关 键 词：植物 细胞质 高温 保存 化石化 模拟 

分 类 号：Q914[天文地球—古生物学与地层学]