The effect of biofertilizers on nickel accumulation, nitrogen metabolism and amino acid profile of corn (Zea mays L.) exposed to nickel stress

被引：0
作者：
Cheraghvareh, Leila [1 ]
Pourakbar, Latifeh [1 ]
Siavash Moghaddam, Sina [2 ]
Xiao, Jianbo [3 ]
机构：
[1] Department of Biology, Faculty of Science, Urmia University, Urmia
[2] Department of Plant Production and Genetics, Faculty of Agriculture, Urmia University, Urmia
[3] Department of Analytical Chemistry and Food Science, Faculty of Food Science and Technology, University of Vigo, Vigo
来源：
Environmental Science and Pollution Research | 2024年 / 31卷 / 37期
基金：
英国科研创新办公室;
关键词：
Amino acid profile; Biofertilizer; Corn; Nickel; Nitrate and nitrit content; Nitrogen metabolism; NR activity;
D O I：
10.1007/s11356-024-34507-z
中图分类号：
学科分类号：
摘要：
The issue of heavy metal pollution such as nickel poses a significant environmental concern, exerting detrimental effects on the growth and viability of plant life. Plants have various mechanisms to effectively manage heavy metal stress, including the ability to modify their amino acid type and content. This adaptive response allows plants to mitigate the detrimental effects caused by excessive heavy metal accumulation. The aim of this study was to investigate the effect of biofertilizers on nickel accumulation, nitrogen metabolism and amino acid profile of corn (Zea mays L.) cv. ‘PL438’ exposed to Ni stress. After disinfecting and soaking in water for 24 h, corn seeds were primed with bacterial biofertilizers (T2: NPK + FZ), fungal biofertilizers (T3: Arbuscular mycorrhizal fungi (AMF) + Trichoderma (T)), or a combination of them (T4: NPK + FZ + AMF + T) and were cultured by the hydroponic method in completely controlled conditions. Then, they were simultaneously exposed to nickel chloride at various rates (0, 75, or 150 µM) at the three-leaf stage. They were harvested two weeks later and were subjected to the measurement of Ni content, nitrate and nitrite content, nitrate reductase activity, and amino acid profile by high-performance liquid chromatography. The results showed that the application of Ni at higher rates increased Ni, nitrate, and nitrite contents and nitrate reductase activity. The study of Ni accumulation and TF revealed that Ni accumulated in the roots to a greater extent than in the shoots and TF was < 1 in all treatments. The shoot amino acid profile showed that the treatment of Ni+2 increased som amino acids such as aspartic acid, asparagine, serine, histidine, and glycine versus the control, whereas T4 Ni+2 increased aspartic acid, glutamic acid, threonine and arginine. The change in amino acids in Ni-treated plants may play a key role in their adaptation to Ni stress. The findings indicate that biofertilizers played a crucial role in mitigating the negative impacts of Ni on corn plants through alterations in amino acid composition and decreased absorption and translocation of Ni. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
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页码：49498 / 49513
页数：15
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