Characterization of cadmium uptake, translocation, and distribution in young seedlings of two hot pepper cultivars that differ in fruit cadmium concentration
Characterization of cadmium uptake, translocation, and distribution in young seedlings of two hot pepper cultivars that differ in fruit cadmium concentration
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两个果实镉含量不同的辣椒品种幼苗镉吸收、易位和分布特征
DOI：
10.1007/s11356-014-2691-4
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发表时间：
2014-03
影响因子：
5.8
通讯作者：
Kebing Liao
中科院分区：
文献类型：
--
作者：
Hongwen Dai;Aiqun Liu Zhou;Wenjing Zhou;Kebing Liao
辣椒（Capsicum annuumL.）积累低水平的镉知之甚少。通过测定辣椒不同器官中Cd的亚细胞定位、化学形态及其在不同器官中的分布，比较低Cd和高Cd辣椒对Cd的吸收和转运特性。采用水培试验研究了低镉品种叶盛朝天椒（YCT）和高镉品种金府早黄椒（JFZ）根、茎、叶中镉的亚细胞分布和化学形态。结果表明，YCT中Cd在根的几乎所有亚细胞组分和所有化学形态中的含量均高于JFZ。与YCT相比，JFZ在茎和叶的几乎所有亚细胞组分中具有更高的Cd浓度，并且在茎和叶的几乎所有化学形态中具有更高的Cd浓度。此外，与JFZ相比，YCT具有显着较高的总Cd积累量，但较低的Cd转运率。总的来说，在这项研究中提出的结果表明，根到地上部通过木质部的镉转运是关键的生理过程，决定镉在辣椒植株的茎和叶的积累水平。不同器官的细胞壁对Cd的固定在Cd解毒和限制Cd的共质体运动中起重要作用。
The reasons why some cultivars of hot pepper (Capsicum annuumL.) accumulate low levels of Cd are poorly understood. We aimed to compare the characteristics of Cd uptake and translocation in low-Cd and high-Cd hot pepper cultivars by determining the subcellular locations and chemical forms of Cd, and its distribution among different plant organs. We conducted a hydroponic experiment to investigate the subcellular distribution and chemical forms of Cd in roots, stems, and leaves of a low-Cd (Yeshengchaotianjiao, YCT) and a high-Cd cultivar (Jinfuzaohuangjiao, JFZ). The results showed that the concentrations of Cd in almost all subcellular fractions of roots, and in all chemical forms in roots, were higher in YCT than in JFZ. Compared with YCT, JFZ had higher Cd concentrations in almost all subcellular fractions of stems and leaves, and higher Cd concentrations in almost all chemical forms in stems and leaves. Additionally, YCT had significantly higher total Cd accumulation but a lower Cd translocation rate compared with JFZ. In general, the results presented in this study revealed that root-to-shoot Cd translocation via the xylem is the key physiological processes determining the Cd accumulation level in stems and leaves of hot pepper plants. Immobilization of Cd by the cell walls of different organs is important in Cd detoxification and limiting the symplastic movement of Cd.
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影响因子：
6.1
作者：
Junli Wang;W. Fang;Zhongyi Yang;Jiangan Yuan;Y. Zhu;Hui Yu
通讯作者：
Junli Wang;W. Fang;Zhongyi Yang;Jiangan Yuan;Y. Zhu;Hui Yu
影响因子：
13.6
作者：
Liu, Jianguo;Min, Qian;Zhu, Qingsen
通讯作者：
Zhu, Qingsen
电子废物活动污染土壤中四种蔬菜作物种植模式的食品安全评估
影响因子：
8.7
作者：
Liu, Ling;Hu, Liangliang;Chen, Xin
通讯作者：
Chen, Xin
影响因子：
9.8
作者：
Yu, Hui;Wang, Junli;Yang, Zhongyi
通讯作者：
Yang, Zhongyi
影响因子：
8.8
作者：
Wu, FB;Dong, J;Zhang, GP
通讯作者：
Zhang, GP