Gabbrielli R, Grossi L, Vergnano O
Plant Physiology Laboratory, Department of Plant Biology, University of Florence, Via Micheli 1, 50121 Florence, Italy.
New Phytol. 1989 Apr;111(4):631-616. doi: 10.1111/j.1469-8137.1989.tb02357.x.
Root Surface acid phosphatase activity was assessed in seedlings of two species of Alyssum, one endemic to Tuscan serpentines (Alyssum bertolonii Desv.) and the other of wide occurrence (Alyssum saxatile L.), cultivated in solutions to which various concentrations of Ni , Ca and Mg were added. Treatments were applied in two factorial experiments of type 2 . A concentration of 0.01 mM Ni markedly stimulated phosphatase activity in A. bertolonii, but slightly decreased it in A. saxatile. Increased Ca concentration stimulated enzyme activity in both species, hut in A. bertolonii the highest activity was obtained with low Ca concentrations, whilst the opposite occured in A. saxatile. A. bertolonii instead required high Mg concentrations to increase phosphatase activity significantly. The same concentrations were toxic to A. saxatile. In the serpentine species, favourable conditions for the increase of phosphatase activity were induced by a high Mg /Ca ratio, which also favoured dry mass production. Therefore it is possible that the increase of phosphatase activity might be an aspect of plant adaptation to serpentines.
在两种庭荠属植物的幼苗中评估了根表面酸性磷酸酶的活性，其中一种是托斯卡纳蛇纹岩地区特有的（伯托洛尼庭荠），另一种广泛分布（岩生庭荠），它们种植在添加了不同浓度镍、钙和镁的溶液中。处理在两个2×2析因试验中进行。0.01 mM的镍浓度显著刺激了伯托洛尼庭荠的磷酸酶活性，但使岩生庭荠的磷酸酶活性略有下降。钙浓度的增加刺激了两种植物的酶活性，但在伯托洛尼庭荠中，低钙浓度时获得了最高活性，而在岩生庭荠中情况则相反。相反，伯托洛尼庭荠需要高镁浓度才能显著提高磷酸酶活性。相同浓度的镁对岩生庭荠有毒。在蛇纹岩物种中，高镁/钙比诱导了有利于磷酸酶活性增加的条件，这也有利于干物质的积累。因此，磷酸酶活性的增加可能是植物适应蛇纹岩的一个方面。
