Bioinformatics and Activity Analysis of Antioxidant Enzymes in Wheat Seedlings under Salt Stress and Their Malondialdehyde Content Changes  

作　　者：Da XU Mengqin WANG Yunfeng ZHANG 

机构地区：[1]School of Life Sciences,Yunnan Normal University,Kunming 650500,China [2]Energy Research Center of Sustainable Development and Utilization of Biomass Energy,Kunming 650500,China [3]School of Chemistry,Biology and Environment,Yuxi Normal University,Yuxi 653100,China

出　　处：《Agricultural Biotechnology》2024年第6期1-5,8,共6页农业生物技术(英文版)

摘　　要：[Objectives]This study was conducted to improve crop yield and select excellent wheat varieties.[Methods]Wheat seedlings were treated with different concentrations of NaCl solution,and the activities of superoxide dismutase(SOD)and peroxidase(POD)and the content changes of malondialdehyde(MDA)in the leaves of seedlings were determined.A control group(distilled water)and three treatment groups(NaCl concentrations of 1,2 and 3 mmol/L)were set up.When the wheat seedlings grew to two leaves and one heart,they should be treated with different concentrations of NaCl solution(the wheat seedlings grew uniformly,and 20 ml of each NaCl concentration was used for treatment of wheat).When the wheat seedlings grew to four leaves and one heart under stress,samples were taken separately,once every 2 d,for three times,with 5 g of leaves each time.The SOD and POD activities and MDA content of seedlings in the control group and treatment groups were determined,and related protein sequences were analyzed by bioinformatics,including signal peptide prediction,transmembrane domain prediction,phosphorylation prediction and protein structure prediction.[Results]Under NaCl stress,the growth rates of seedling length and root length of wheat decreased obviously,and SOD and POD in leaves decreased,while the MDA content in leaves after treatment increased compared with the control group.SOD had no signal peptide,while POD had signal peptides and a transmembrane region.SOD and POD were different in terms of secondary and tertiary structures and the number of phosphorylation sites.[Conclusions]These results lays a solid theoretical foundation and application prospect for the study on salt tolerance mechanism of wheat seedlings in the later stage.

关 键 词：WHEAT Salt stress SOD activity POD activity MDA content bioinformation 

分 类 号：S51[农业科学—作物学]