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Effect of antimony in soils of an Sb mine on the photosynthetic pigments and antioxidant system of Dittrichia viscosa leaves.
Environmental Geochemistry and Health ( IF 4.2 ) Pub Date : 2020-06-19 , DOI: 10.1007/s10653-020-00616-0
I Garrido 1 , A Ortega 1 , M Hernández 2 , L Fernández-Pozo 3 , J Cabezas 3 , F Espinosa 1
Affiliation  

Antimony is a toxic element whose concentration in soil and water has been rising due to anthropogenic activities. This study focuses on its accumulation in leaves of Dittrichia viscosa growing in soils of an abandoned Sb mine, and the effect on oxidant/antioxidant systems and photosynthetic efficiency. The results showed leaves to have a high Sb accumulation capacity. The amount of total chlorophyll decreased depending on Sb concentration and of carotenoids increased slightly, with a consequent increase in carotenoid/chlorophyll ratio. Photosynthetic efficiency was unaffected. The amount of O.−2 rose, although there was no increase in cell membrane damage, with lipid peroxidation levels being similar to normal. This response may be due to considerable increases that were observed in total phenolics, PPO activity, and enzymatic antioxidant system. SOD, POX, and DHAR activities increased in response to increased Sb amounts in leaves. The ascorbate/glutathione cycle was also affected, with strong increases observed in all of its components, and consequent increases in total contents of the ascorbate and glutathione pools. However, the ratio between reduced and oxidized forms declined, reflecting an imbalance between the two, especially that between GSH and GSSG. Efficient detoxification of Sb may take place either through increases in phenolics, carotenoids, and components of the glutathione–ascorbate cycle or through the enzymatic antioxidant system. Since Dittrichia viscosa accumulates large amounts of Sb without suffering oxidative damage, it could be used for phytoremediation.



中文翻译:

Sb矿山土壤中的锑对粘枝铁皮(Dittrichia viscosa)叶片光合色素和抗氧化系统的影响。

锑是一种有毒元素,由于人为活动,其在土壤和水中的浓度一直在上升。这项研究侧重于其在废弃的Sb矿山土壤中生长的粘菌(Dittrichia viscosa)叶片中的积累,以及对氧化剂/抗氧化剂系统和光合效率的影响。结果表明叶片具有高的Sb积累能力。总的叶绿素含量随Sb浓度而降低,而类胡萝卜素则略有增加,从而导致类胡萝卜素/叶绿素比增加。光合效率不受影响。O .− 2的量尽管细胞膜损伤没有增加,但脂质过氧化水平却与正常水平相似,因此上升。该反应可能是由于总酚,PPO活性和酶促抗氧化剂系统中的显着增加所致。随着叶片中Sb含量的增加,SOD,POX和DHAR活性也增​​加。抗坏血酸盐/谷胱甘肽的循环也受到影响,其所有组分均明显增加,因此,抗坏血酸盐和谷胱甘肽池的总含量增加。但是,还原形式和氧化形式之间的比例下降,反映了两者之间的不平衡,尤其是GSH和GSSG之间的不平衡。Sb的有效排毒可以通过酚类,类胡萝卜素,和谷胱甘肽-抗坏血酸循环的组成或通过酶促抗氧化剂系统。以来粘枝铁皮(Dittrichia viscosa)积累大量Sb而不遭受氧化损伤,可用于植物修复。

更新日期:2020-06-23
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