Abstract：
Propylparaben (PrP) and dichloropropylparaben (diClPrP) are found in soil worldwide, mainly due to the incorporation of urban sludge in crop soils and the use of non-raw wastewater for irrigation. Studies on the adverse effects of PrP on plants are incipient and not found for diClPrP. PrP and diClPrP were evaluated at concentrations 4, 40, and 400 µg/L for their phytotoxic potential to seeds of Allium cepa (onion), Cucumis sativus (cucumber), Lycopersicum sculentum (tomato), and Lactuca sativa (lettuce), and cytotoxic, genotoxic potential, and for generating oxygen-reactive substances in root meristems of A. cepa bulbs. PrP and diClPrP caused a significant reduction in seed root elongation in all four species. In A. cepa bulb roots, PrP and diClPrP resulted in a high prophase index; in addition, PrP at 400 µg/L and diClPrP at the three concentrations significantly decreased cell proliferation and caused alterations in a significant number of cells. Furthermore, diClPrP concentrations induced the development of hooked roots in onion bulbs. The two chemical compounds caused significant changes in the modulation of catalase, ascorbate peroxidase, and guaiacol peroxidase, disarming the root meristems against hydroxyl radicals and superoxides. Therefore, PrP and diClPrP were phytotoxic and cytogenotoxic to the species tested, proving dangerous to plants.
摘要：
对羟基苯甲酸丙酯（PrP）和对羟基苯甲酸二氯丙酯（diClPrP）存在于世界各地的土壤中，主要是由于城市污泥在作物土壤中的掺入以及使用非原废水进行灌溉。关于PrP对植物的不利影响的研究是初期的，对于diClPrP尚未发现。以4、40和400µg/L的浓度评估PrP和diClPrP对洋葱种子的植物毒性潜力，黄瓜（黄瓜），番茄（番茄），和Lactucasativa（生菜），和细胞毒性，基因毒性潜能，并在A.cepa球茎的根分生组织中产生氧反应物质。PrP和diClPrP导致所有四个物种的种子根伸长显着降低。在A.cepa球茎根中，PrP和diClPrP导致较高的前期指数；此外，400µg/L的PrP和三种浓度的diClPrP显着降低了细胞增殖，并引起了大量细胞的改变。此外，diClPrP浓度诱导洋葱鳞茎中钩根的发育。这两种化合物引起过氧化氢酶调节的显著变化，抗坏血酸过氧化物酶，和愈创木酚过氧化物酶，解除根分生组织对抗羟基自由基和超氧化物。因此,PrP和diClPrP对测试物种具有植物毒性和细胞遗传毒性，证明对植物是危险的。
