Caesium and strontium accumulation in shoots of Arabidopsis thaliana: genetic and physiological aspects.
Caesium and strontium accumulation in shoots of Arabidopsis thaliana: genetic and physiological aspects.
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DOI：
10.1093/jxb/erq213
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发表时间：
2010-09
影响因子：
6.9
通讯作者：
Schäffner AR
中科院分区：
文献类型：
--
作者：
Kanter U;Hauser A;Michalke B;Dräxl S;Schäffner AR
由于铯（Cs+）和钾（K+）以及锶（Sr 2+）和钙（Ca 2+）的物理化学相似性，这两种元素都很容易被植物吸收，从而进入食物链。当涉及放射性核素如137 Cs和90 Sr时，这可能是有害的。在这项研究中，无论是遗传和生理方面的Cs+和Sr 2+积累在拟南芥进行了研究，使用86拟南芥和分离的F2群体的低Cs+积累的Sq-1（阿斯科特，英国）与高吸收Sorbo（Khurmatov，塔吉克斯坦）。水培植物暴露于亚毒性水平的Cs+和Sr 2+使用放射性同位素作为示踪剂。在自然加入拍摄浓度的Cs+以及Sr 2+变化约2倍，而其遗传力范围为0.60和0.73之间的两个离子。芽积累的Cs+和Sr 2+可能会受到损害，其基本类似物K+和Ca 2+的浓度增加，分别导致高达80%的减少。以Sq-1×Sorbo的F2/F3分离群体为研究对象，对Cs ~+和Sr ~（2+）积累量进行了QTL定位，主要QTL位于第1和第5染色体上。根据相关性和判别性调查结合QTL分析，Cs+和Sr 2+的吸收似乎主要通过非选择性阳离子通道介导。一个多态性，影响氨基酸接近K+孔的一个候选人，环核苷酸门控通道1（CNGC 1），被确定在Sorbo和高Cs+浓度加入。
Due to the physico-chemical similarities of caesium (Cs+) to potassium (K+) on the one hand and strontium (Sr2+) to calcium (Ca2+) on the other hand, both elements can easily be taken up by plants and thus enter the food chain. This could be detrimental when radionuclides such as 137Cs and 90Sr are involved. In this study, both genetic and physiological aspects of Cs+ and Sr2+ accumulation in Arabidopsis thaliana were investigated using 86 Arabidopsis accessions and a segregating F2 population of the low Cs+ accumulating Sq-1 (Ascot, UK) crossed with the high uptaking Sorbo (Khurmatov, Tajikistan). Hydroponically grown plants were exposed to subtoxic levels of Cs+ and Sr2+ using radioactive isotopes as tracers. In the natural accessions shoot concentration of Cs+ as well as Sr2+ varied about 2-fold, whereas its heritability ranged for both ions between 0.60 and 0.73. Shoot accumulation of Cs+ and Sr2+ could be compromised by increasing concentrations of their essential analogues K+ and Ca2+, respectively, causing a reduction of up to 80%. In the case of the segregating F2/F3 population Sq-1×Sorbo, this study identified several QTL for the trait Cs+ and Sr2+ accumulation, with main QTL on chromosomes 1 and 5. According to the correlation and discrimination surveys combined with QTL-analysis Cs+ and Sr2+ uptake seemed to be mediated mostly via non-selective cation channels. A polymorphism, affecting amino acids close to the K+-pore of one candidate, CYCLIC-NUCLEOTIDE-GATED CHANNEL 1 (CNGC1), was identified in Sorbo and associated with high Cs+ concentrating accessions.
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影响因子：
6.9
作者：
BOWEN, HJM;DYMOND, JA
通讯作者：
DYMOND, JA
影响因子：
27.5
作者：
Dunkel, Marcel;Latz, Andreas;Hedrich, Rainer
通讯作者：
Hedrich, Rainer
拟南芥中全基因组的关联映射确定了先前已知的开花时间和病原体抗性基因。
影响因子：
4.5
作者：
Aranzana MJ;Kim S;Zhao K;Bakker E;Horton M;Jakob K;Lister C;Molitor J;Shindo C;Tang C;Toomajian C;Traw B;Zheng H;Bergelson J;Dean C;Marjoram P;Nordborg M
通讯作者：
Nordborg M
影响因子：
7.2
作者：
Cellier, F;Conéjéro, G;Casse, F
通讯作者：
Casse, F
影响因子：
5.6
作者：
Jones, DT
通讯作者：
Jones, DT