Characterization and discrimination of tundra plant leaves by Attenuated Total Reflection Fourier transform infrared spectroscopy

IF 1.5 4区 地球科学 Q3 ECOLOGY
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Abstract

Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy is a powerful tool for investigating the biochemical fingerprint of plants, but its applicability to tundra plant leaves has yet to be addressed. The present study aimed to apply ATR-FTIR measurement to characterize tundra plant leaves and to discriminate these among plant species with different growth forms. The ATR-FTIR spectra in the fingerprint region (1800–800 cm−1) of live and dead leaves from 14 tundra plant species of shrubs, forbs, graminoids, and mosses showed a variability in overall appearance among plant species and a degree of similarity between live and dead leaves of the same plant species. Four highest peaks were found at 1637–1575 cm−1, 1452–1406 cm−1, 1325–1313 cm−1, and 1058–1022 cm−1 in these spectra and are attributed to chemical features of lignin, cellulose, and/or oxalate. Principal component analyses showed that leaves of Oxyria digyna and other forbs had distinctive spectral characteristics attributable to the content of oxalate and other putative compounds and that contents of lignin relative to cellulose were generally greater in shrubs than in graminoids and mosses. These results demonstrated that ATR-FTIR spectroscopy is useful for future applications in polar biology and ecology, for example the description of functional traits of arctic plants and decomposition processes by microbes.

通过衰减全反射傅立叶变换红外光谱分析苔原植物叶片的特征和鉴别方法
衰减全反射傅立叶变换红外光谱(ATR-FTIR)是研究植物生化指纹的有力工具,但其对冻原植物叶片的适用性尚待研究。本研究旨在应用 ATR-FTIR 测量来描述苔原植物叶片的特征,并区分不同生长形态的植物物种。14 种苔原植物(灌木、草本植物、禾本科植物和苔藓植物)的活叶和枯叶在指纹区(1800-800 cm-1)的 ATR-FTIR 光谱显示,不同植物物种的整体外观存在差异,而同一植物物种的活叶和枯叶则有一定程度的相似性。在这些光谱中,四个最高峰分别位于 1637-1575 cm-1、1452-1406 cm-1、1325-1313 cm-1 和 1058-1022 cm-1,它们是木质素、纤维素和/或草酸盐的化学特征。主成分分析表明,木犀属(Oxyria digyna)和其他草本植物的叶片具有独特的光谱特征,可归因于草酸盐和其他假定化合物的含量,而且相对于纤维素,灌木中木质素的含量通常高于禾本科植物和苔藓植物。这些结果表明,ATR-傅立叶变换红外光谱仪可用于极地生物学和生态学的未来应用,例如描述北极植物的功能特征和微生物的分解过程。
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来源期刊
Polar Science
Polar Science ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
3.90
自引率
5.60%
发文量
46
期刊介绍: Polar Science is an international, peer-reviewed quarterly journal. It is dedicated to publishing original research articles for sciences relating to the polar regions of the Earth and other planets. Polar Science aims to cover 15 disciplines which are listed below; they cover most aspects of physical sciences, geosciences and life sciences, together with engineering and social sciences. Articles should attract the interest of broad polar science communities, and not be limited to the interests of those who work under specific research subjects. Polar Science also has an Open Archive whereby published articles are made freely available from ScienceDirect after an embargo period of 24 months from the date of publication. - Space and upper atmosphere physics - Atmospheric science/climatology - Glaciology - Oceanography/sea ice studies - Geology/petrology - Solid earth geophysics/seismology - Marine Earth science - Geomorphology/Cenozoic-Quaternary geology - Meteoritics - Terrestrial biology - Marine biology - Animal ecology - Environment - Polar Engineering - Humanities and social sciences.
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