Abstract:
:Plastid development in seedlings of Arabidopsis thaliana is affected by the transfer of (1)O(2)-mediated retrograde signals from the plastid to the nucleus and changes in nuclear gene expression during late embryogenesis. The potential impact of these mechanisms on plastid differentiation is maintained throughout seed dormancy and becomes effective only after seed germination. Inactivation of the 2 nuclear-encoded plastid proteins EXECUTER1 and EXECUTER2 blocks (1)O(2)-mediated retrograde signaling before the onset of dormancy and impairs normal plastid formation in germinating seeds. This long-term effect of (1)O(2) retrograde signaling depends on the recruitment of abscisic acid (ABA) during seedling development. Unexpectedly, ABA acts as a positive regulator of plastid formation in etiolated and light-grown seedlings.
journal_name
Proc Natl Acad Sci U S Aauthors
Kim C,Lee KP,Baruah A,Nater M,Göbel C,Feussner I,Apel Kdoi
10.1073/pnas.0901315106subject
Has Abstractpub_date
2009-06-16 00:00:00pages
9920-4issue
24eissn
0027-8424issn
1091-6490pii
0901315106journal_volume
106pub_type
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