Abstract：
:The molecular mechanisms of the differences among the Cd tolerance and accumulation of different pak choi cultivars are essential to further breed Cd-safe genotypes pak choi. In our research, via morphological comparison, qRT-PCR and yeast function complementary approaches, we explored the differences of Cd tolerance and capacity for Cd uptake in nine various pak choi varieties. Results showed that higher expressions of BcZIPs involved in Cd uptake in 'Kang Re605' may lead to its higher capacity for Cd accumulation. The lowest expressions of transporter gene in 'Wu Yueman' were consistent with its fewest ability to uptake Cd. Beyond that, the difference of resistance was very great among varieties. Meanwhile, the expressions of the BcGSTUs were differentially induced by Cd exposure in different pak choi varieties, and 'Kang Re605' performed the highest BcGSTUs expression overall. To verify the role of GSTUs played in Cd resistance of pak choi, four BcGSTUs, BcGSTU4, BcGSTU11, BcGSTU12 and BcGSTU22 in a high-Cd accumulation and tolerance variety 'Kang Re605' were cloned, quantitated and transferred to Cd-sensitive yeast mutant strain. And finally found that BcGSTU11 increased the Cd tolerance of yeast, which may associate with a high Cd resistance of 'Kang Re605'. Simultaneously, less BcGSTUs abundance in 'Shang Haiqing' may result in its weak tolerance to Cd. These findings will help us to comprehend the roles of BcZIPs and BcGSTUs in Cd absorption and detoxification as well as promote our understanding of the Cd-resistant and Cd-accumulated mechanisms in pak choi.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
Wu X,Chen J,Yue X,Wei X,Zou J,Chen Y,Su N,Cui Jdoi
10.1016/j.ecoenv.2019.109571subject
Has Abstractpub_date
2019-11-15 00:00:00pages
109571eissn
0147-6513issn
1090-2414pii
S0147-6513(19)30902-9journal_volume
183pub_type
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