金属修饰和类金属补充对叶片防御的影响是超积累拟南芥中的植物登录特异性。

IF 4.1 3区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Biometals Pub Date : 2023-10-24 DOI:10.1007/s10534-023-00550-5
Rocky Putra, Max Tölle, Ute Krämer, Caroline Müller
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引用次数: 0

摘要

人为工业化造成的金属和准金属对土壤的污染对生态系统产生了严重的破坏性影响。然而,某些被称为超积累植物的植物物种能够在其地上组织中积累非常高浓度的这些金属(多倍体)。众所周知,金属(类黄酮)的这种超积累作用可以防御各种拮抗剂,如食草动物和病原体。我们通过用常见的金属污染物镉(Cd)和锌(Zn)对土壤进行人工改良,研究了金属(多倍体)对超积累植物拟南芥(Brassicaceae)潜在防御特性的影响,如叶片元素防御、有机防御和机械防御。此外,在未改良和金属改良的土壤中添加类金属硅(Si),以研究Si是否可以缓解金属过量。在标准化条件下,在全因子设计中培养来自一个非/低和两个具有不同金属浓度的中度至高度金属污染位点的个体(以下称为材料)八周。金属改良剂和补硅对某些元素(Zn、Si、铝(Al)、铁(Fe)、钾(K)和硫(S))的叶面浓度有显著的交互作用,但这些都是特定的。芥子油苷是十字花科特有的有机防御物质,在不同材料中具有不同的特征,其组成受土壤金属改良剂的影响。此外,生长在金属改良土壤上的植物在其中一份材料中含有较低浓度的总硫代葡萄糖苷,这表明无机防御获得和有机防御生物合成之间存在潜在的权衡。作为第一层机械防御的替代物,叶面毛的密度也受到金属改良剂和/或Si补充的影响,并呈加入依赖性。我们的研究强调了研究土壤中共存的金属(类物质)对超积累物种不同材料的各种叶片防御特性的影响的重要性。
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Effects of metal amendment and metalloid supplementation on foliar defences are plant accession-specific in the hyperaccumulator Arabidopsis halleri

Soil pollution by metals and metalloids as a consequence of anthropogenic industrialisation exerts a seriously damaging impact on ecosystems. However, certain plant species, termed hyperaccumulators, are able to accumulate extraordinarily high concentrations of these metal(loid)s in their aboveground tissues. Such hyperaccumulation of metal(loid)s is known to act as a defence against various antagonists, such as herbivores and pathogens. We investigated the influences of metal(loid)s on potential defence traits, such as foliar elemental, organic and mechanical defences, in the hyperaccumulator plant species Arabidopsis halleri (Brassicaceae) by artificially amending the soil with common metallic pollutants, namely cadmium (Cd) and zinc (Zn). Additionally, unamended and metal-amended soils were supplemented with the metalloid silicon (Si) to study whether Si could alleviate metal excess. Individuals originating from one non-/low- and two moderately to highly metal-contaminated sites with different metal concentrations (hereafter called accessions) were grown for eight weeks in a full-factorial design under standardised conditions. There were significant interactive effects of metal amendment and Si supplementation on foliar concentrations of certain elements (Zn, Si, aluminium (Al), iron (Fe), potassium (K) and sulfur (S), but these were accession-specific. Profiles of glucosinolates, characteristic organic defences of Brassicaceae, were distinct among accessions, and the composition was affected by soil metal amendment. Moreover, plants grown on metal-amended soil contained lower concentrations of total glucosinolates in one of the accessions, which suggests a potential trade-off between inorganic defence acquisition and biosynthesis of organic defence. The density of foliar trichomes, as a proxy for the first layer of mechanical defence, was also influenced by metal amendment and/or Si supplementation in an accession-dependent manner. Our study highlights the importance of examining the effects of co-occurring metal(loid)s in soil on various foliar defence traits in different accessions of a hyperaccumulating species.

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来源期刊
Biometals
Biometals 生物-生化与分子生物学
CiteScore
5.90
自引率
8.60%
发文量
111
审稿时长
3 months
期刊介绍: BioMetals is the only established journal to feature the important role of metal ions in chemistry, biology, biochemistry, environmental science, and medicine. BioMetals is an international, multidisciplinary journal singularly devoted to the rapid publication of the fundamental advances of both basic and applied research in this field. BioMetals offers a forum for innovative research and clinical results on the structure and function of: - metal ions - metal chelates, - siderophores, - metal-containing proteins - biominerals in all biosystems. - BioMetals rapidly publishes original articles and reviews. BioMetals is a journal for metals researchers who practice in medicine, biochemistry, pharmacology, toxicology, microbiology, cell biology, chemistry, and plant physiology who are based academic, industrial and government laboratories.
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