Adamec Lubomír
Institute of Botany of the Academy of Sciences of the Czech Republic, Section of Plant Ecology, Dukelská 135, CZ-379 82 Třeboň, Czech Republic.
New Phytol. 2002 Jul;155(1):89-100. doi: 10.1046/j.1469-8137.2002.00441.x.
• The mineral nutrition of terrestrial carnivorous plants was investigated under glasshouse conditions to elucidate ecophysiological adaptations of this plant group. • In Drosera capillaris and D. capensis, absorption of N, P, K, and Mg from insects was relatively efficient (> 43%), whereas that of Ca was not. Carnivorous plants (D. capensis, D. peltata, D. scorpioides, and Dionaea muscipula) exhibited a high efficiency of re-utilization of N (70-82%), P (51-92%), and K (41-99%) from senescing leaves. Re-utilization of Mg was low or negative, and that of Ca highly negative. • In a growth experiment, foliar nutrient supply led to markedly increased growth and nutrient accumulation in D. capillaris, D. aliciae, and D. spathulata. In all the three species tested it was demonstrated that leaf-supplied nutrients were accumulated in the plant biomass and even stimulated root nutrient uptake. • These results suggest that the main physiological effect of leaf nutrient absorption from prey is a stimulation of root nutrient uptake.
• 在温室条件下研究了陆生食虫植物的矿物质营养，以阐明该植物类群的生态生理适应性。
• 在细叶茅膏菜和开普茅膏菜中，从昆虫吸收氮、磷、钾和镁的效率相对较高（>43%），而钙的吸收效率则不然。食虫植物（开普茅膏菜、盾叶茅膏菜、天蝎座茅膏菜和捕蝇草）从衰老叶片中再利用氮（70 - 82%）、磷（51 - 92%）和钾（41 - 99%）的效率很高。镁的再利用率低或为负，而钙的再利用率则为高度负值。
• 在一项生长实验中，叶面养分供应导致细叶茅膏菜、艾丽西亚茅膏菜和匙叶茅膏菜的生长和养分积累显著增加。在所有测试的三个物种中都表明，叶面供应的养分在植物生物量中积累，甚至刺激了根系对养分的吸收。
• 这些结果表明，从猎物叶片吸收养分的主要生理作用是刺激根系对养分的吸收。
