An investigation of zinc isotope fractionation in cacao (Theobroma cacao L.) and comparison of zinc and cadmium isotope compositions in hydroponic plant systems under high cadmium stress.
An investigation of zinc isotope fractionation in cacao (Theobroma cacao L.) and comparison of zinc and cadmium isotope compositions in hydroponic plant systems under high cadmium stress.
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DOI：
10.1038/s41598-023-30899-z
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发表时间：
2023-03-22
影响因子：
4.6
通讯作者：
Rehkaemper, Mark
中科院分区：
文献类型：
--
作者：
Barati, Elnaz;Moore, Rebekah E. T.;Ullah, Ihsan;Kreissig, Katharina;Coles, Barry J.;Dunwell, Jim M.;Rehkaemper, Mark
本研究的目的是建立是否锌（Zn）和镉（Cd）的吸收和转运在可可植物（可可L.）有相似的生理机制。采用多收集器ICP-MS测定了在20 µmol L−1 CdCl 2溶液中水培生长的19种不同可可基因型的根、茎和叶中的Zn稳定同位素组成。另外一种基因型的植物生长在含有较低镉浓度的水培溶液中（0和5 µmol L−1添加CdCl 2）。在不同Cd暴露浓度下，Zn稳定同位素组成在植物器官中表现出相同的系统模式，即δ 66 Zn根> δ 66 Zn茎> δ 66 Zn叶（δ 66 Zn表示66 Zn/64 Zn比值的相对差异，单位为千分之几）。植物与水培溶液之间Zn稳定同位素分馏的平均值为ε 66 Zn吸收= -1.15 ± 0.36‰（2SD），表明植物优先从水培溶液中吸收同位素轻的Zn。与Zn从根到茎的转运相关的平均稳定同位素分馏因子ε 66 Znseq-mob = + 0.52 ± 0.36‰（2SD）表明，重同位素Zn优先被螯合在可可根中，而轻同位素Zn则被动员到叶片中。相同植物的Cd稳定同位素组成的比较表明，这两个同位素轻Zn和Cd的可可植物优先采取。然而，与锌相反，可可根保留同位素轻镉和转移同位素重镉的叶子。
This study aims to establish whether zinc (Zn) and cadmium (Cd) share similar physiological mechanisms for uptake and translocation in cacao plants (Theobroma cacao L.). Multiple-collector ICP-MS was used to determine the Zn stable isotope compositions in the roots, stems and leaves of 19 diverse cacao genotypes grown in hydroponics with 20 µmol L−1 CdCl2. Additional plants of one genotype were grown in hydroponic solutions containing lower Cd concentrations (0 and 5 µmol L−1 added CdCl2). Regardless of the Cd concentration used in the exposures, the Zn stable isotope compositions show the same systematic patterns in plant organs, with δ66Znroot > δ66Znstem > δ66Znleaf (δ66Zn denotes relative differences in 66Zn/64Zn ratios in parts per thousand). The mean Zn stable isotope fractionation between the plants and the hydroponic solutions was ε66Znuptake = –1.15 ± 0.36‰ (2SD), indicating preferential uptake of isotopically light Zn by plants from the hydroponic solution. The mean stable isotope fractionation factor associated with translocation of Zn from roots to shoots, ε66Znseq-mob = + 0.52 ± 0.36‰ (2SD), shows that isotopically heavy Zn is preferentially sequestered in the cacao roots, whilst isotopically light Zn is mobilised to the leaves. A comparison with the Cd stable isotope compositions of the same plants shows that both isotopically light Zn and Cd are preferentially taken up by cacao plants. In contrast to Zn, however, the cacao roots retain isotopically light Cd and transfer isotopically heavy Cd to the leaves.
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影响因子：
4.3
作者：
Arnold, Tim;Schoenbaechler, Maria;Rehkaemper, Mark;Dong, Schuofei;Zhao, Fang-Jie;Kirk, Guy J. D.;Coles, Barry J.;Weiss, Dominik J.
通讯作者：
Weiss, Dominik J.
影响因子：
9.8
作者：
Arguello, David;Chavez, Eduardo;Montalvo, Daniela
通讯作者：
Montalvo, Daniela
影响因子：
11.4
作者：
Aucour, A. M.;Pichat, S.;Oger, P.
通讯作者：
Oger, P.
影响因子：
5.1
作者：
Dykema, PE;Sipes, PR;Randall, SK
通讯作者：
Randall, SK
超积累和非积累植物中的镍和锌同位素分馏
影响因子：
11.4
作者：
Deng, Teng-Hao-Bo;Coquet, Christophe;Qiu, Rong-Liang
通讯作者：
Qiu, Rong-Liang