Cuticle ultrastructure of Pseudofrenelopsis gansuensis: Further taxonomical implications for Cheirolepidiaceae
Cuticle ultrastructure of Pseudofrenelopsis gansuensis: Further taxonomical implications for Cheirolepidiaceae
复制标题
甘肃拟拟弗林洛普斯 (Pseudofrelopsis gansuensis) 的角质层超微结构：对 Cheirolepidiaceae 的进一步分类学意义
DOI：
10.1016/j.cretres.2016.11.006
复制
发表时间：
2017-03-01
影响因子：
2.1
通讯作者：
Wang, Yong-Dong
中科院分区：
文献类型：
--
作者：
Guignard, Gaetan;Yang, Xiao-Ju;Wang, Yong-Dong
利用扫描和透射电镜技术对吉林汪清早白垩世掌鳞科针叶树Pseudofrenelopsis gansuensis进行了详细的研究。结果表明，该化石植物角质层具有9个超微结构特征，这些特征有助于区分气孔器的表皮细胞、附属细胞、保卫细胞和下皮层细胞的角质层。角质层超微结构的三维重建。Pseudofrenelopsis gansuensis是该属的第二个种，其角质层超微结构已被统计检查，30个测量值和估计的置信区间值。通过比较手鳞科与其它化石针叶树的表皮超微结构特征，包括统计数据，为该属的分类学意义提供了潜在的证据：10个特征具有潜在的种属分离价值，11个属属分离参数和3个科鉴定参数。根据三个比值对两种拟无齿藓属植物P.dalatzensis和P.gansuensis的铜进行初步的元素分析，发现其化学成分存在差异，这一点也值得进一步研究。(C)2016爱思唯尔有限公司版权所有。
A study of the cheirolepidiaceous conifer Pseudofrenelopsis gansuensis from the Lower Cretaceous of Wangqing Jilin Province in China was conducted in detail using scanning and transmission electron microscopy techniques. In total, nine ultrastructural features were recognized for the cuticle of this fossil plant, which are helpful in the distinguishing between cuticles of ordinary epidermal cells, subsidiary cells, guard cells and hypodermal cells of the stomatal apparatus. A three dimensional reconstruction of the cuticle ultrastructure was obtained. Pseudofrenelopsis gansuensis is the second species of this genus for which the cuticle ultrastructure has been statistically examined with 30 measurements and estimated confidence interval values. The close comparison of the cuticle ultrastructure characters, including statistical data, among Cheirolepidiaceae and other fossil conifers provides potential evidence of the taxonomic significance of this genus: ten characters are potentially valuable for specific separation, eleven parameters for generic separation and three parameters seem also to be useful for Family determination. The differences in the chemical composition according to preliminary statistical element analyses of the cuticles based on three ratios in two species of Pseudofrenelopsis, P. dalatzensis and P. gansuensis, should also be examined in future studies. (C) 2016 Elsevier Ltd. All rights reserved.