Chemical Composition of Australian Mangroves I. Inorganic Ions and Organic Acids

Zeitschrift für Pflanzenphysiologie Pub Date : 1984-03-01 DOI:10.1016/S0044-328X(84)80096-3

Marianne Popp

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引用次数: 80

Abstract

Young and old leaves from 22 mangrove species of Northern Queensland (Australia) were investigated for inorganic ions and organic acids. Na⁺ and Cl⁻ concentrations expressed on plant water basis were close to sea water with the exception of Heritiera littoralis and Hibiscus tiliaceus, which are both regarded as brackish water species. Leaf age did not appear to effect Na⁺ and Cl⁻ storage much. SO₄²⁻ and Mg²⁺ increased markedly in old leaves of salt-secreting species such as Avicennia marina, Avicennia eucalyptifolia, Aegialitis annulata, Aegiceras corniculatum and Acanthus ilicifolius as well as in the members of the Rhizophoraceae.

Free oxalate was found in all salt-secreting species and young leaves of Lumnitzera racemosa. Malate and citrate were present in all species, while quinate and shikimate occurred frequently. The contribution of organic acids to the anion content was important in only a few cases.

Mechanisms of salt-regulation and problems in the classification of mangroves are discussed.

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澳大利亚红树林的化学组成I.无机离子和有机酸

对澳大利亚北昆士兰22种红树林幼叶和老叶的无机离子和有机酸进行了研究。Na+和Cl−在植物水基上的表达浓度与海水相近，但被认为是咸淡水物种的有海棠(Heritiera littoralis)和芙蓉(hishisus tiliaceus)。叶龄对Na+和Cl−储量影响不大。SO42−和Mg2+在海棠、桉叶海棠、环叶海棠、盾叶海棠和棘叶海棠等盐分泌物种的老叶以及根参科植物的叶片中均显著升高。在所有的盐分泌种和总状麻的幼叶中均发现游离草酸盐。苹果酸盐和柠檬酸盐在所有物种中都存在，而奎宁酸盐和牛膝酸盐经常出现。有机酸对阴离子含量的贡献仅在少数情况下是重要的。讨论了红树林盐调节机制及分类中存在的问题。

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