Plant molecular strategies in response to soil contaminants

过去和现在的工业活动，例如采矿和石油化学提炼，对环境产生了重大的有害影响，在加拿大各地留下大片退化和受污染的土地。大多数污染场地受到有机和无机化合物的影响。主要的有机污染物包括石油副产品、挥发性有机化合物、芳烃和农药。常见的无机污染物是金属和类金属，称为微量元素。植物修复是一种环境技术，旨在利用植物的这些自然机制及其积累或降解土壤污染物的相关特性。对于生长在这种污染土壤中的植物来说，潜在的有毒污染物会引起具有非生物胁迫特征的生理和分子变化。虽然它们的共同发生是众所周知的，但它们各自的作用和顺序（前因后果、机制和输出）仍然很少被描述。

Past and current industrial activities, such as mining and petrochemical refinement, have had major deleterious effects on the environment, leaving large areas of degraded and contaminated lands throughout Canada. The majority of contaminated sites is affected by both organic and inorganic compounds. The predominant organic contaminants include petroleum by-products, volatile organic compounds, aromatic hydrocarbons and pesticides. Common inorganic contaminants are metals and metalloids, referred to as trace elements. Phytoremediation is the environmental technique that aims to take advantage of these natural mechanisms in plants and of their associated properties of accumulation or degradation of soil contaminants. For plants growing in such polluted soils the potentially toxic contaminants induce physiological and molecular changes that are characteristic of abiotic stress. Although their co-occurrence is well known, their respective role and sequence (antecedent, mechanism and output) remain poorly described.