Zengin Fikriye
J Environ Biol. 2015 Jan;36(1):249-54.
The present study illustrates the phytotoxic effect of As on wheat seedlings and pre-application of salicylic acid in alleviating toxic effect of arsenic. Wheat seedlings treated with different concentrations (50-400 μM) of arsenic decreased the germination rate (34.7% and 86.9%), root and coleptile length, fresh and dry weight of roots and coleoptile, chlorophyll (67%) and protein content (27.1%), while increased proline and MDA content. However, pretreatment with 1mM saliycilic acid partially alleviated the toxic effect of arsenic on germination parameters and significantly reduced the proline (181.2%) and MDA (80%) content thereby increasing chlorophyll and protein content in As stressed wheat plants (p < 0.01 or p < 0.05). The data suggests that saliycilic acid reduced the damaging effects generated by As and enhanced the tolerance of wheat plants to arsenic toxicity.
本研究阐述了砷对小麦幼苗的植物毒性作用以及水杨酸预处理对减轻砷毒性作用的影响。用不同浓度（50 - 400μM）的砷处理小麦幼苗，会降低发芽率（分别为34.7%和86.9%）、根和胚芽鞘长度、根和胚芽鞘的鲜重与干重、叶绿素含量（降低67%）以及蛋白质含量（降低27.1%），同时增加脯氨酸和丙二醛含量。然而，用1mM水杨酸预处理可部分减轻砷对发芽参数的毒性作用，并显著降低脯氨酸含量（降低181.2%）和丙二醛含量（降低80%），从而增加砷胁迫下小麦植株的叶绿素和蛋白质含量（p < 0.01或p < 0.05）。数据表明，水杨酸降低了砷产生的破坏作用，并增强了小麦植株对砷毒性的耐受性。
