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Differences in Selenium Uptake, Distribution and Expression Of Selenium Metabolism Genes in Tomatoes.

Author(s)
Wanyi Zhao College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, People's Republic of China
Weihong Xu College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, People's Republic of China
Yourong Chai College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, People's Republic of China
Xinbin Zhou College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, People's Republic of China
Mingzhong Zhang College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, People's Republic of China
Wenwen Xie College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, People's Republic of China
Abstract
Effects of different levels of selenium (0, 5 and 10 mg·kg-1) on selenium uptake, distribution, and the expression levels of Se metabolism genes were compared with three tomato (Solanum lycopersicum L.) varieties (KT30, Defumm-8 and Luobeiqi). The results showed that Se inhibited the expression levels of APS reductase in varieties of KT30 and Luobeiqi; however, there was no significant difference in variety Defumm-8. Selenium also promoted expression levels of ATP sulfurylase of the tomato varieties. The expression levels of cysteine desulfurase of variety KT30 and variety Defumm-8 first decreased and then increased with the increasing Se concentration; however, expression levels of Se were lower than the control, and expression levels of Se in leaves of variety Luobeiqi increased. The Se concentration markedly decreased the expression levels of Sadenosyl-l-Met:l-Met S-methyltransferase in the three varieties, except variety Defumm-8 with Se at 5 mg·kg-1. Furthermore, the Se concentration markedly decreased expression levels of serine acetyltransferase of variety KT30 and variety Defumm-8, but expression levels of leaves of variety Luobeiqi increased. Expression levels of serine acetyltransferase in variety Luobeiqi increased with the increasing Se concentration but decreased in KT30 and Defumm-8. Expression levels of SeCys methyltransferase (SMT) in Luobeiqi and KT30 were reduced by Se, while promoted in Defumm-8. The Se treatment promoted expression levels of APS in three tomato varieties.
Publication Details
Page(s) 528-534
Published Journal: International Journal of Agriculture and Biology, Volume: 19, Issue: 3, Year: 2017

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2017.,(Received 22 December 2016; Accepted 27 February -
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