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Different response of two reindeer forage plants to enhanced UV-B radiation: modification of the phenolic composition

机译：两种驯鹿饲草植物对增强的UV-B辐射的不同反应：酚类成分的改性

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摘要

The long-term effects of enhanced UV-B radiation on the content and composition of leaf phenolics in Epilobium angustifolium L. and Eriophorum russeolum Fries ex Hartman were studied in northern Finland (68 °N) using two UV-B enhancement experiments, both simulating UV-B_(CIE) radiation and corresponding to a 20% loss of ozone layer. High proportions of hydrolyzable tannins (69%) and condensed tannins (66%) characterized both Epilobium and Eriophorum leaves, respectively. No UV treatment effect was detected in the content or composition of Epilobium leaf soluble phenolics, whereas significant UV effects were detected in Eriophorum leaves in a developmental-specific manner. At the end of the growing season, the proportion of total soluble phenolics was higher in leaves exposed to enhanced UV-A and UV-B radiation than in the control leaves, but the phenolic composition was not significantly modified. This study introduces a new example on plants' phenolic response to UV radiation being species-specific and detectable only at certain developmental stages. Possible consequences of increased phenolic content in forage plants for selection and digestibility by reindeer are, however, not yet known.
机译：使用两个UV-B增强实验，在芬兰北部（68°N）研究了增强的UV-B辐射对桔梗和Eriophorum russeolum Fries ex Hartman中叶酚的含量和组成的长期影响。 UV-B_（CIE）辐射，相当于臭氧层损失20％。高比例的可水解单宁（69％）和浓缩单宁（66％）分别表征了上皮叶和E叶。在上皮叶可溶性酚的含量或组成中未检测到紫外线处理作用，而在草叶中以发育特异性方式检测到显着的紫外线作用。在生长季节结束时，暴露于增强的UV-A和UV-B辐射的叶片中总可溶性酚类的比例高于对照叶片，但酚类成分没有明显改变。这项研究介绍了一个新的例子，说明植物对紫外线辐射的酚类反应是物种特异性的，只有在某些发育阶段才能检测到。但是，尚不知道饲草植物中酚类含量增加的可能性，以供驯鹿选择和消化。

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  • 来源
    《Polar biology》 |2011年第3期|p.411-420|共10页
  • 作者

    Franchise Martz; Minna Turunen; Riitta Julkunen-Tiitto; Hanne Suokanerva; Marja-Liisa Sutinen;

  • 作者单位

    Arctic Centre, University of Lapland, POB 122,96101 Rovaniemi, Finland,Rovaniemi Research Unit, Finnish Forest Research Institute,POB 16, 96301 Rovaniemi, Finland;

    Arctic Centre, University of Lapland, POB 122,96101 Rovaniemi, Finland;

    Natural Product Research Laboratories, Faculty of Biosciences,University of Joensuu, POB 111, 80101 Joensuu, Finland;

    Arctic Research Centre, Finnish Meteorological Institute (FMI-ARC), Taehtelaentie 62, 99600 Sodankylae, Finland;

    Rovaniemi Research Unit, Finnish Forest Research Institute,POB 16, 96301 Rovaniemi, Finland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    epilobium angustifolium; eriophorum russeolum; phenolics; tannins; UV radiation; subarctic;

    机译：桔梗赤草酚醛树脂单宁紫外线辐射;亚北极;

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