Abstract:
:miR398 links expression of the three major chloroplast copper proteins, plastocyanin, CCS1 and Csd2, to copper availability. miR398 abundance was stronger plastocyanin-controlled in accessions from cold and continental habitats (Kas-1, Ms-0, WS) than in Cvi-0 and Col-0. Target gene regulation was broken for Csd2 in Cvi-0 upon cold-treatment. Comparison of miR398 levels, target gene regulation as well as Ago1 and miR168 expression demonstrated that the miR398 regulon can be overwritten by accession specific transcriptional regulation in Cvi-0. It is concluded that the escape from the miRNA control of copper homeostasis is linked to adaptation of Cvi-0 to its harsh natural habitat.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Juszczak I,Baier Mdoi
10.1016/j.febslet.2012.07.049subject
Has Abstractpub_date
2012-09-21 00:00:00pages
3385-90issue
19eissn
0014-5793issn
1873-3468pii
S0014-5793(12)00617-5journal_volume
586pub_type
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