Silicon Mitigates Aluminum Toxicity of Tartary Buckwheat by Regulating Antioxidant Systems
作者机构：Key Laboratory of Coarse Cereal ProcessingMinistry of Agriculture and Rural AffairsSichuan Engineering&Technology Research Center of Coarse Cereal IndustrializationCollege of Food and Biological EngineeringChengdu UniversityChengdu610106China Research Center of Buckwheat Industry TechnologySchool of Life SciencesGuizhou Normal UniversityGuiyang550001China
出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)
年 卷 期：2024年第93卷第1期
页 面：1-13页
核心收录：
学科分类：1008[医学-中药学(可授医学、理学学位)] 1006[医学-中西医结合] 100602[医学-中西医结合临床] 10[医学]
基 金：Science&Technology Department of Sichuan Province(2022YFQ0041,2022NSFSC1725,2023NSFSC0214) China Agriculture Research System(CARS-07-B-1) The National Natural Science Foundation of China(32160428) Innovative Training Program for College Students(202311079040,S202311079112,CDUCX2023550) Undergraduate Education and Teaching Reform Project of Chengdu University(cdjgb2022186)
主 题：Tartary buckwheat aluminum stress silicon root growth oxidative stress
摘 要：Aluminum (Al) toxicity is a considerable factor limiting crop yield and biomass in acidic soil. Tartary buckwheatgrowing in acidic soil may suffer from Al poisoning. Here, we investigated the influence of Al stress on the growthof tartary buckwheat seedling roots, and the alleviation of Al stress by silicon (Si), as has been demonstrated inmany crops. Under Al stress, root growth (total root length, primary root length, root tips, root surface area, androot volume) was significantly inhibited, and Al and malondialdehyde (MDA) accumulated in the root tips. At thesame time, catalase (CAT) and ascorbate peroxidase activities, polyphenols, flavonoids, and 1,1-diphenyl-2-picrylhydrazyl(DPPH) and 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) free-radical scavenging abilitywere significantly decreased. After the application of Si, root growth, Al accumulation, and oxidative damage wereimproved. Compared to Al-treated seedlings, the contents of ·O2− and MDA decreased by 29.39% and 25.22%,respectively. This was associated with Si-induced increases in peroxidase and CAT enzyme activity, flavonoidcompounds, and free-radical scavenging (DPPH and ABTS). The application of Si therefore has positive effectson Al toxicity in tartary buckwheat roots by reducing Al accumulation in the roots and maintaining oxidationhomeostasis.
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