Chemical Composition of Australian Mangroves III. Free Amino Acids, Total Methylated Onium Compounds and Total Nitrogen

Zeitschrift für Pflanzenphysiologie Pub Date : 1984-03-01 DOI:10.1016/S0044-328X(84)80074-4

M. Popp , F. Larher , P. Weigel

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引用次数: 68

Abstract

Free amino acids, total methylated onium compounds (TMOC) and total nitrogen were investigated in young and old leaves of 22 mangrove species from Northern Queensland (Australia). Total nitrogen ranged between 0.35 to 2.5% of dry matter depending on leaf age and species. The soluble nitrogen compounds accounted only in a few cases for more than 10% of the total nitrogen. High proline accumulation was observed in only three species: Aegialitis annulata (28.5 mol · m^-3 plant water), Xylocarpus granatum (76.0 mol · m^-3 pw) and Xylocarpus mekongensis (56.7 mol · m^-3 pw). The latter two species contained also hydroxyproline as a major component of the amino acid fraction. GABA, GLU, ASP and ALA were the most frequently occurring amino acids in the other species. Avicennia eucalyptifolia, Avicennia marina, Hibiscus tiliaceus and Heritiera littoralis accumulated high concentrations of TMOC (up to 107 mol · m^-3 plant water), while Acanthus ilicifolius stored both TMOC and PRO.

The occurrence of organic solutes in mangroves is discussed in comparison to herbaceous halophytes.

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澳大利亚红树林的化学成分3。游离氨基酸，总甲基化铵化合物和总氮

对澳大利亚北昆士兰22种红树林幼叶和老叶的游离氨基酸、总甲基化铵化合物(TMOC)和总氮进行了研究。全氮占干物质的比例在0.35 ~ 2.5%之间，取决于叶龄和品种。可溶性氮化合物仅在少数情况下占总氮的10%以上。脯氨酸积累量高的物种只有3种:agialitis annulata (28.5 mol·m-3植物水分)、Xylocarpus granatum (76.0 mol·m-3 pw)和Xylocarpus mekongensis (56.7 mol·m-3 pw)。后两种还含有羟脯氨酸作为氨基酸部分的主要成分。GABA、GLU、ASP和ALA是其他物种中最常见的氨基酸。桉木犀、海木犀、木槿和海木犀积累了高浓度的TMOC(植物水分最高可达107 mol·m-3)，而刺槐则同时储存了TMOC和PRO。讨论了有机溶质在红树林中的赋存情况，并与草本盐生植物作了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Zeitschrift für Pflanzenphysiologie

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