首页> 外文期刊>Environmental Toxicology and Chemistry >EFFECTS ON GROWTH AND PHYSIOLOGICAL PARAMETERS IN WHEAT (TRITICUM AESTIVUM L.) GROWN IN SOIL AND IRRIGATED WITH CYANOBACTERIAL TOXIN CONTAMINATED WATER
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EFFECTS ON GROWTH AND PHYSIOLOGICAL PARAMETERS IN WHEAT (TRITICUM AESTIVUM L.) GROWN IN SOIL AND IRRIGATED WITH CYANOBACTERIAL TOXIN CONTAMINATED WATER

机译:蓝藻毒素污染水灌溉对土壤中小麦生长的生长和生理参数的影响

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The present study investigates the germination and growth of Triticum aestivum exposed to two different microcystins (microcystin-LR [where the two variable places in the toxin molecule are leucine (L) and arginine (R) (MC-LR)] and microcystin-RR) and to cell-free cyanobacterial crude extract containing MC-LR. The concentration of the microcystins was set to 0.5 μg L−1 and therefore is in the range of concentrations normally detected in the environment. In three experiments, the inhibition of germination, the inhibition of root and shoot development, photosynthesis, and activity of oxidative stress-response enzymes, such as glutathione-S-transferase, glutathione peroxidase, and glutathione reductase, were measured. All plants were placed in pots containing normal garden soil to investigate the effects of soil in the uptake of toxin by Triticum aestivum. The results showed clear effects on the morphology of roots and shoots, which were inhibited in exposures with cyanotoxins and crude extract. The inhibition of photosynthesis and the elevation of antioxidative-response enzymes indicate the generation of reactive oxygen species due to the exposure to the toxins resulting in oxidative stress for the plants.
机译:本研究调查了暴露于两种不同微囊藻毒素(微囊藻毒素-LR [其中毒素分子中的两个可变位置是亮氨酸(L)和精氨酸(R)(MC-LR)]和微囊藻毒素-RR)的普通小麦的发芽和生长)并去除含有MC-LR的无细胞蓝藻粗提物。微囊藻毒素的浓度设置为0.5μgL-1,因此处于环境中通常检测到的浓度范围内。在三个实验中,测量了抑制发芽,抑制根和茎发育,光合作用以及氧化应激反应酶(如谷胱甘肽-S-转移酶,谷胱甘肽过氧化物酶和谷胱甘肽还原酶)的活性。将所有植物放置在含有普通花园土壤的盆中,以研究土壤对普通小麦吸收毒素的影响。结果表明,对根和芽的形态有明显的影响,在暴露于氰毒素和粗提物后会受到抑制。光合作用的抑制和抗氧化反应酶的升高表明由于暴露于毒素而导致了植物的氧化胁迫,从而产生了活性氧。

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