PDF(Pubmed)
Abstract：
The current investigation aims to underline the impact of salicylic acid or calcium chloride seed pre-treatments on mineral status and oxidative stress markers, namely levels of electrolyte leakage (EL) and lipid peroxidation levels, measured as thiobarbituric reactive substances (TBARS), and the activity of some antioxidant enzymes in roots and leaves of plants in two barley species grown under various salt treatments. Overall, our results revealed that salinity inhibits essential nutrient absorption such as iron, calcium, magnesium and potassium and stimulates the absorption of sodium. Also, this environmental constraint induced oxidative stress in plants in comparison with the control conditions. This state of oxidative stress is reflected by an increase in TBARS content as well as the stimulation of EL values. In addition, salinity induced disturbances in the activity of antioxidant enzymes, which were mainly dependent on the applied salt concentration and the species. In addition, Hordeum marinum maintained high antioxidant enzyme activity and low levels of oxidative stress parameters, which reinforces its salt-tolerant character. Importantly, salicylic acid or calcium chloride seed priming alleviated the mineral imbalance and the oxidative damage induced by salinity. Moreover, seed priming improves iron, calcium magnesium and potassium content and limitsthe accumulation of sodium. Also, both treatments not only decrease TBARS levels and limit EL, but they also stimulate the antioxidant enzyme activities in the leaves and roots of the stressed plants as compared with stressed plants grown from non-primed seeds. Interestingly, the beneficial effects of the mentioned treatments were more notable on Hordeum vulgare species.
摘要：
目前的调查旨在强调水杨酸或氯化钙种子预处理对矿物质状态和氧化应激标志物的影响，即电解质渗漏（EL）水平和脂质过氧化水平，测量为硫代巴比妥反应性物质（TBARS），以及在各种盐处理下生长的两种大麦植物的根和叶中某些抗氧化酶的活性。总的来说,我们的结果表明，盐度会抑制铁等必需营养素的吸收，钙，镁和钾，刺激钠的吸收。此外，与对照条件相比，这种环境约束在植物中引起了氧化应激。这种氧化应激状态反映在TBARS含量的增加以及EL值的刺激上。此外,盐度诱导抗氧化酶活性的干扰，这主要取决于施加的盐浓度和物种。此外,大麦保持高抗氧化酶活性和低水平的氧化应激参数，这加强了它的耐盐性。重要的是,水杨酸或氯化钙种子引发减轻了矿物质失衡和盐度引起的氧化损伤。此外，种子引发改善铁，钙镁和钾的含量和限制钠的积累。此外，两种治疗不仅降低TBARS水平和限制EL，但与从非引发种子生长的胁迫植物相比，它们也刺激胁迫植物的叶片和根部的抗氧化酶活性。有趣的是,上述处理对大麦品种的有益作用更为显着。
