“Mining” the herbarium for hyperaccumulators: Discoveries of nickel and zinc (hyper)accumulation in the genus Noccaea (Brassicaceae) through X-ray fluorescence herbarium scanning

IF 1.7 4区 环境科学与生态学 Q3 ECOLOGY Ecological Research Pub Date : 2024-02-07 DOI:10.1111/1440-1703.12448
Ksenija Jakovljević, Tomica Mišljenović, Antony van der Ent, Alan J. M. Baker, Vanessa R. Invernón, Guillaume Echevarria
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Abstract

X-ray fluorescence spectroscopy (XRF) is a relatively new method for non-destructive elemental analysis of herbarium material that meets the scientific interest in being capable of discovering new hyperaccumulator plant species. Since the genus Noccaea (Brassicaceae family) is known to be one of the most numerous in term of the hyperaccumulator plant species it contains, especially those that hyperaccumulate Ni, the herbarium material available worldwide represents a great resource for expanding our knowledge of their elemental profiles. In this first systematic XRF scanning of herbarium specimens of the genus Noccaea, a total of 794 specimens from the collection of the National Museum of Natural History in Paris (MNHN) were analyzed, and the raw values obtained were corrected using regression formulas against inductively coupled plasma atomic emission spectroscopy data. Hyperaccumulation of Ni was detected in 90 specimens covering 21 taxa, with Ni concentrations reaching up to 48,700 mg kg−1 in Noccaea cappadocica, an ultramaficophyte from Syria. Zinc concentrations above the hyperaccumulation threshold were found in 210 specimens covering 23 taxa, most of which belonged to different subspecies of Noccaea caerulescens, with the highest concentration reaching up to 56,200 mg kg−1 in N. caerulescens subsp. caerulescens. Although the accumulation of Ni and Zn is contrasting in most of the specimens studied, in 10 specimens, predominantly belonging to N. caerulescens, simultaneous hyperaccumulation of Ni and Zn was found. This study also revealed previously unknown hyperaccumulation of Ni in several Noccaea taxa, as well as a simultaneous hyperaccumulation of Ni and Zn that needs to be confirmed by further experimental and field studies.

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在标本馆中 "挖掘 "超积累植物:通过 X 射线荧光标本扫描发现 Noccaea 属(十字花科)的镍和锌(超)积累现象
X 射线荧光光谱法(XRF)是对标本材料进行非破坏性元素分析的一种相对较新的方法,符合发现新的高积累植物物种的科学兴趣。众所周知,芸香科 Noccaea 属是高积累植物物种最多的属之一,尤其是那些高积累镍的物种,因此全世界现有的标本材料是扩大我们对其元素特征了解的重要资源。在首次对 Noccaea 属标本进行系统 XRF 扫描时,我们分析了巴黎国立自然历史博物馆(MNHN)收藏的 794 份标本,并根据电感耦合等离子体原子发射光谱数据使用回归公式对获得的原始值进行了校正。在 21 个类群的 90 个标本中检测到镍的超积累,其中叙利亚的超微叶藻 Noccaea cappadocica 中的镍浓度高达 48,700 mg kg-1。在 23 个类群的 210 份标本中发现锌浓度超过了超积累阈值,其中大部分属于 Noccaea caerulescens 的不同亚种,N. caerulescens subsp.虽然镍和锌在大多数研究标本中的积累情况截然不同,但在主要属于 N. caerulescens 的 10 个标本中,发现了镍和锌同时过度积累的现象。这项研究还揭示了以前在几种 Noccaea 类群中不为人知的镍的超积累现象,以及镍和锌的同时超积累现象,这需要进一步的实验和实地研究来证实。
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来源期刊
Ecological Research
Ecological Research 环境科学-生态学
CiteScore
4.40
自引率
5.00%
发文量
87
审稿时长
5.6 months
期刊介绍: Ecological Research has been published in English by the Ecological Society of Japan since 1986. Ecological Research publishes original papers on all aspects of ecology, in both aquatic and terrestrial ecosystems.
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