De Marco A, De Simone C, Raglione M, Lorenzoni P
Centro di Genetica Evoluzionistica, C.N.R. Università la Sapienza, Roma, Italy.
Mutat Res. 1995 Aug;344(1-2):5-12. doi: 10.1016/0165-1218(95)90033-0.
The clastogenic activity of the herbicide maleic hydrazide (MH) in Vicia faba seedlings grown in different soils was studied. In the first series of experiments the seedlings were treated with MH in nine soils of different selected properties. The second experimental protocol provided for a growth step in each of the nine soils under study and then for the treatment of the seedlings with MH in a sandy soil. The results obtained show that less clastogenic damage (induction of micronuclei and aberrant anatelophases) was observed in the seedlings treated in the soils with a high content of organic and clay-type colloids. A growth step carried out in the organic soils, before the treatment with MH, was observed to reduce the genotoxic effects of the herbicide when the seedlings were treated in a sandy soil. These findings suggest that some components of soil organic matter, such as fulvic and humic acids, may be absorbed by the plant roots and so carry out an antimutagenic activity against MH within the plant.
研究了除草剂马来酰肼（MH）对在不同土壤中生长的蚕豆幼苗的致断裂活性。在第一系列实验中，在九种具有不同选定特性的土壤中用MH处理幼苗。第二个实验方案规定，先在九种受试土壤中的每一种中进行生长阶段，然后在沙土中用MH处理幼苗。所得结果表明，在含有高含量有机和粘土类胶体的土壤中处理的幼苗中，观察到的致断裂损伤（微核诱导和后期异常）较少。在用MH处理之前，在有机土壤中进行生长阶段，当在沙土中处理幼苗时，观察到可降低除草剂的遗传毒性作用。这些发现表明，土壤有机质的某些成分，如富里酸和腐殖酸，可能被植物根系吸收，从而在植物体内对MH发挥抗诱变活性。
