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首页> 外文期刊>Russian Journal of Plant Physiology >Changes in chemical composition of hydrophyte leaves during adaptation to aquatic environment.
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Changes in chemical composition of hydrophyte leaves during adaptation to aquatic environment.

机译：在适应水生环境期间水生植物叶片化学成分的变化。

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摘要

Leaf chemical composition of 19 hydrophytes was studied. The content of carbon, nitrogen, nonstructural carbohydrates, organic acids, minerals, and water was determined. Hydrophytes were shown to contain less carbon (below 410 mg/g dry wt in 60% species) than terrestrial plants. Hydrophytes and terrestrial plants did not differ in the nitrogen concentration in the leaves (33 and 29 mg/g dry wt, respectively). Hydrophytes were characterized by a low content of organic acids (40-90 mg/g dry wt in 60% species) and high content of mineral compounds (90-170 mg/g dry wt in 50% species). Total amount of nonstructural carbohydrates was similar in the leaves of hydrophytes and terrestrial plants (from 120 to 190 mg/g dry wt), but the proportions of various carbohydrate fractions differed substantially. In the hydrophyte leaves, the content of soluble carbohydrates was 2.4-fold lower, whereas the content of nonstructural polysaccharides 1.2-fold higher than in terrestrial plant leaves. Two groups of correlations between parameters of leaf chemical composition were distinguished: the contents of carbon, nitrogen, and soluble sugars were positively correlated, and the negative correlation was observed between these parameters and the amounts of mineral compounds, organic acids, water, and nonstructural polysaccharides. We concluded that hydrophyte leaf chemical composition reflects a specificity of plant adaptation to aquatic environment.
机译：研究了19种水生植物的叶片化学组成。测定了碳，氮，非结构性碳水化合物，有机酸，矿物质和水的含量。结果表明，水生植物的碳含量比陆生植物少（在60％物种中，干重低于410 mg / g）。水生植物和陆生植物的叶片氮含量没有差异（分别为33和29 mg / g干重）。水生植物的特征是有机酸含量低（60％物种中40-90 mg / g干重）和矿物质含量高（50％物种中90-170 mg / g干重）。在水生植物和陆生植物的叶子中，非结构性碳水化合物的总量相似（从120至190 mg / g干重），但是各种碳水化合物馏分的比例却大不相同。在水生植物叶片中，可溶性碳水化合物的含量比陆生植物叶片中的低2.4倍，而非结构性多糖的含量高1.2倍。区分了叶片化学组成参数之间的两组相关性：碳，氮和可溶性糖的含量呈正相关，而这些参数与矿物质，有机酸，水和非结构性的含量之间呈负相关。多糖。我们得出的结论是，水生植物叶片的化学成分反映了植物对水生环境的适应性特异性。

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