Interspecific variation in bulk tissue, fatty acid and monosaccharide δ13C values of leaves from a mesotrophic grassland plant community
Interspecific variation in bulk tissue, fatty acid and monosaccharide δ13C values of leaves from a mesotrophic grassland plant community
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DOI：
10.1016/j.phytochem.2008.03.009
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发表时间：
2008-07-01
期刊：
影响因子：
3.8
通讯作者：
Evershed, Richard P.
中科院分区：
文献类型：
--
作者：
Dungait, Jennifer A. J.;Docherty, Gordon;Evershed, Richard P.
采用中营养草地37种草、草本、灌木和乔木的叶片，评价了同一植物群落叶片体积、脂肪酸和单糖δ C-13值的自然变异。叶片组织平均体积δ C-13值为-29.3‰。组织体积δ C-13值与生命形式之间无显著差异（P=0.40）。平均而言，C-16:0、C-18:2和C-18:3占叶片组织总脂肪酸的89%，其δ C-13值与全叶组织相比明显减少。脂肪酸δ C-13值在种间（不同种间）有普遍的变化趋势，即δ C-13(16:0) < δ C-13(18:2) < δ C-13(18:3)，尽管这些值在种间差异很大，如C-16:0（-34.7分/千分，金菖蒲，-44.0分/千分），C-18:2（-33.3分/千分，野槭，-44.2分/千分）和C-18:3（-34.3分/千分，百年虫，-34.3分/千分）；-千分之41.8，车前草)。叶片单糖阿拉伯糖、木糖、甘露糖、半乳糖和葡萄糖的平均相对丰度分别为12%、13%、5%、12%和54%。这些单糖的平均δ C-13值分别为-26.6‰（阿拉伯糖）、-27.2‰（木糖）、-30.9‰（甘露糖）、-30.0‰（半乳糖）和-29.0‰（葡萄糖）。单个单糖δ C-13值δ C-13(arbinose) > δ C-13（木糖）> δ C-13(glucose) > δ C-13（半乳糖）之间的一般关系一致。因此，我们已经表明(i)化合物特异性δ C-13值的多样性对叶片体积δ C-13值的贡献；（ii）单个草地物种叶片的体积和化合物特异性δ C-13值之间的种间变异性，以及（iii）同一植物群落中所有物种叶片共同的单个脂肪酸和单糖δ C-13值之间的趋势。(C) 2008年Elsevier Ltd.出版
The leaves of 37 grass, herb, shrub and tree species were collected from a mesotrophic grassland to assess natural variability in bulk, fatty acid and monosaccharide delta C-13 values of leaves from one plant community. The leaf tissue mean bulk delta C-13 value was -29.3 parts per thousand. No significant differences between tissue bulk delta C-13 values with life form were determined (P=0.40). On average, C-16:0, C-18:2 and C-18:3 constituted 89% of leaf tissue total fatty acids, whose delta C-13 values were depleted compared to whole leaf tissues. A general interspecific (between different species) trend for fatty acids delta C-13 values was observed, i.e. delta C-13(16:0) < delta C-13(18:2) < delta C-13(18:3), although these values ranged widely between species, e.g. C-16:0 (-34.7 parts per thousand, Alisma plantago-aquatica; -44.0 parts per thousand, Leucanthemum vulgare), C-18:2 (-33.3 parts per thousand, Acer campestre; -44.2 parts per thousand, L. vulgare;) and C-18:3 (-34.3 parts per thousand, Bellis perennis; -41.8 parts per thousand, Plantago lanceolata). Average relative abundances of leaf monosaccharides arabinose, xylose, mannose, galactose and glucose were 12%, 13%, 5%, 12% and 54%, respectively. Mean delta C-13 values of these monosaccharides were -26.6 parts per thousand (arabinose), -27.2 parts per thousand (xylose), -30.9 parts per thousand (mannose), -30.0 parts per thousand (galactose) and -29.0 parts per thousand (glucose). The general relationship between individual monosaccharide delta C-13 values, delta C-13(arbinose) > delta C-13(xylose) > delta C-13(glucose) > delta C-13(galactose), was consistently observed. Therefore, we have shown (i) diversity in compound-specific delta C-13 values contributing to leaf bulk delta C-13 values; (ii) interspecific variability between bulk and compound-specific delta C-13 values of leaves of individual grassland species, and (iii) trends between individual fatty acid and monosaccharide delta C-13 values common to leaves of all species within one plant community. (C) 2008 Published by Elsevier Ltd.