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Differentiation analysis of boron isotopic fractionation in different forms within plant organ samples
Phytochemistry ( IF 3.2 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.phytochem.2017.12.012
Aide Sun , Qingcai Xu , Gangjian Wei , Huayu Zhu , Xuefei Chen

As a critical micronutrient, boron (B) plays an important role in plant growth and embryonic development. To further understand the effects of B uptake, transportation and isotopic fractionation, the contents and isotopic compositions of hydro-soluble B in the sap and structural B fixed in the cell within individual plant tissues were investigated. The B isotope ratio was determined by multi-collector inductively coupled plasma mass spectrometry. The δ11B values in hydro-soluble and structural B in the investigated plant samples ranged from -1.57‰ to +11.30‰ and from +6.57‰ to +16.64‰, respectively. Different fractionation factors of the B isotopes, in the range of 0.9954-1.0150, were observed in these samples, indicating that in most plant tissues, the heavy isotope (11B) was preferentially enriched in structural B, which was fixed into the cell. However, there was a reversal in the fractionation of B isotopic compositions in the fruit samples compared with the other plant tissue samples. It is more powerful to examine the molecular mechanisms of B transport, uptake and utilization than the use of limited plant organ samples containing a mixture of hydro-soluble and structural B within different intra-plant compartments and in inter-plant interactions. These isotopic shifts, which may be used as important isotopic indicators, contribute to the surface processes interactions in the plant-soil system and the knowledge of the molecular mechanisms of B in the uptake and absorption by different plant species in nature.

中文翻译:

植物器官样品中不同形式硼同位素分馏的差异分析

作为一种关键的微量营养素,硼 (B) 在植物生长和胚胎发育中起着重要作用。为了进一步了解 B 吸收、运输和同位素分馏的影响,研究了树液中水溶性 B 的含量和同位素组成以及固定在单个植物组织细胞中的结构 B。B同位素比通过多接收器电感耦合等离子体质谱法测定。所研究植物样品中水溶性和结构 B 中的 δ11B 值范围分别为 -1.57‰ 至 +11.30‰ 和 +6.57‰ 至 +16.64‰。在这些样品中观察到B同位素的不同分馏因子,范围为0.9954-1.0150,表明在大多数植物组织中,重同位素(11B)优先富集结构B,并固定在细胞中。然而,与其他植物组织样品相比,水果样品中 B 同位素组成的分离发生了逆转。与使用有限的植物器官样本相比,在不同的植物内隔室和植物间相互作用中使用含有水溶性和结构性 B 的混合物,检查 B 转运、吸收和利用的分子机制更有效。这些同位素变化可用作重要的同位素指示剂,有助于植物-土壤系统中的表面过程相互作用以及自然界不同​​植物物种吸收和吸收 B 的分子机制的知识。与使用有限的植物器官样本相比,在不同的植物内隔室和植物间相互作用中使用含有水溶性和结构性 B 的混合物,检查 B 转运、吸收和利用的分子机制更有效。这些同位素变化可用作重要的同位素指示剂,有助于植物-土壤系统中的表面过程相互作用以及自然界不同​​植物物种吸收和吸收 B 的分子机制的知识。与使用有限的植物器官样本相比,在不同的植物内隔室和植物间相互作用中使用含有水溶性和结构性 B 的混合物,检查 B 转运、吸收和利用的分子机制更有效。这些同位素变化可用作重要的同位素指示剂,有助于植物-土壤系统中的表面过程相互作用以及对自然界中不同植物物种吸收和吸收 B 的分子机制的了解。
更新日期:2018-03-01
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