Identifying inflorescence phytoliths from selected species of wheat (Triticum monococcum, T. dicoccon, T. dicoccoides, and T. aestivum) and barley (Hordeum vulgare and H. spontaneum) (Gramineae)
Identifying inflorescence phytoliths from selected species of wheat (Triticum monococcum, T. dicoccon, T. dicoccoides, and T. aestivum) and barley (Hordeum vulgare and H. spontaneum) (Gramineae)
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DOI：
10.2307/2656798
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发表时间：
1999-11-01
影响因子：
3
通讯作者：
Anderson, N
中科院分区：
文献类型：
--
作者：
Ball, TB;Gardner, JS;Anderson, N
微化石硅植硅体的分析正在成为分类学家、考古植物学家和古生态学家越来越重要的研究工具。研究人员扩大对植硅体分析的使用依赖于植硅体系统学的发展。本研究利用计算机图像分析和统计分析技术，对四种小麦，即普通小麦、二粒小麦、二粒小麦和普通小麦，以及大麦和普通大麦的花序苞片所产生的植硅体进行了分析，旨在开发分类工具来区分分类单元。根据每个物种产生的花序植硅体的平均形态计量学之间的显著差异，创建了一个分类检索表并进行了测试。还对几种形态类型的植硅体的形态计量学进行了判别分析，以确定这一计算机辅助统计程序是否可以作为分类单元的另一种方法，并确定哪些形态类型具有最适合用于判别函数的测量值。试验结果表明，在属的水平上，植物硅体某些形态类型的分类检索表和判别分析都是区分所考虑的分类群中花序苞片中产生的植物硅体的相对可靠的工具。在物种水平上区分分类单元时，分类检索表最为可靠。在检验的判别分析中，基于所有植硅体形态类型组合的判别分析比仅基于一种形态类型的判别分析更可靠。
Analysis of microfossil silica phytoliths is becoming an increasingly important research tool for taxonomists, archaeobotanists, and paleoecologists. Expanded use of phytolith analysis by researchers is dependent upon development of phytolith systematics. In this study phytoliths produced by the inflorescence bracts from four species of wheat, Triticum monoccocum, T. dicoccon, T. dicoccoides, and T. aestivum, and two species of barley, Hordeum vulgare, and H. spontaneum, were analyzed using computer-assisted image and statistical analysis with the intent to develop taxonomic tools to distinguish among the taxa. A classification key based on significant differences among the mean morphometries of the inflorescence phytoliths produced by each species was created and tested. Discriminant analysis of the morphometries of several morphotypes of phytoliths was also conducted to determine whether this computer-assisted statistical procedure could be used as another method to classify the taxa and to determine which morphotypes have measurements that can best be used in discriminant functions. Test results indicated that, at the genus level, both the classification key and discriminant analysis of certain morphotypes of phytoliths were relatively reliable tools for distinguishing among phytoliths produced in the inflorescence bracts of the taxa considered. For distinguishing among the taxa at the species level, the classification key was most reliable. Of the discriminant analyses tested, that based on all the phytolith morphotypes combined was more reliable than those based on only one morphotype.