Distributions of cadmium, zinc, and polyphenols in Gamblea innovans
Distributions of cadmium, zinc, and polyphenols in Gamblea innovans
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DOI：
10.1080/15226514.2018.1524840
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发表时间：
2019-01
影响因子：
3.7
通讯作者：
Misuzu Sakurai;Rie Tomioka;A. Hokura;Y. Terada;C. Takenaka
中科院分区：
文献类型：
--
作者：
Misuzu Sakurai;Rie Tomioka;A. Hokura;Y. Terada;C. Takenaka
摘要虎耳草是一种广泛分布于日本次生林中的镉、锌富集落叶树种。研究了镉、锌在不同土壤中的积累特征。innovans，以便有效地利用该物种进行植物修复。为此，我们研究了次生代谢产物含量与Cd、Zn在草中的积累和分布的关系。Innovans叶和基部茎使用微X射线荧光（µ-XRF）。我们的研究结果表明，锌叶浓度和多酚/2，2-二苯基-1-苦基肼（DPPH）自由基清除活性呈负相关。这一发现可能与压力或表现出的机制，为耐受镉和锌积累。此外，我们观察到，镉积累主要在质外体区域的表面组织，如树皮和叶表皮，而锌积累在质外体和共质体区域。因此，G. Innovans能区分Cd和Zn并控制其转运。
Abstract Gamblea innovans is a Cd- and Zn-accumulating deciduous tree widely distributed in the secondary forests of Japan. We aimed to understand the characteristics of Cd and Zn accumulation in G. innovans in order to effectively utilize the species for phytoremediation. To accomplish that, we studied the relationship between secondary metabolite concentrations and the accumulation and distributions of Cd and Zn in G. innovans leaves and basal stems using micro-X ray fluorescence (µ-XRF). Our results showed a negative correlation between Zn leaf concentrations and polyphenol/2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. This finding might be related to stress or the manifestation of a mechanism for tolerance to Cd and Zn accumulation. In addition, we observed that Cd accumulated primarily in the apoplastic region of surface tissues such as bark and the epidermis of leaves, whereas Zn accumulated in both apoplastic and symplastic regions. Thus, it might be possible that G. innovans can distinguish between Cd and Zn and control their translocation.