CIA2 and CIA2-LIKE are required for optimal photosynthesis and stress responses in Arabidopsis thaliana

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Gawronski , P , Burdiak , P , Scharff , L B , Mielecki , J , Gorecka , M , Zaborowska , M , Leister , D , Waszczak , C & Karpinski , S 2021 , ' CIA2 and CIA2-LIKE are required for optimal photosynthesis and stress responses in Arabidopsis thaliana ' , Plant Journal , vol. 105 , no. 3 , pp. 619-638 . https://doi.org/10.1111/tpj.15058

Title: CIA2 and CIA2-LIKE are required for optimal photosynthesis and stress responses in Arabidopsis thaliana
Author: Gawronski, Piotr; Burdiak, Pawel; Scharff, Lars B.; Mielecki, Jakub; Gorecka, Magdalena; Zaborowska, Magdalena; Leister, Dario; Waszczak, Cezary; Karpinski, Stanislaw
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
Date: 2021-02
Language: eng
Number of pages: 20
Belongs to series: Plant Journal
ISSN: 0960-7412
URI: http://hdl.handle.net/10138/335813
Abstract: Chloroplast-to-nucleus retrograde signaling is essential for cell function, acclimation to fluctuating environmental conditions, plant growth and development. The vast majority of chloroplast proteins are nuclear-encoded, and must be imported into the organelle after synthesis in the cytoplasm. This import is essential for the development of fully functional chloroplasts. On the other hand, functional chloroplasts act as sensors of environmental changes and can trigger acclimatory responses that influence nuclear gene expression. Signaling via mobile transcription factors (TFs) has been recently recognized as a way of communication between organelles and the nucleus. In this study, we performed a targeted reverse genetic screen to identify dual-localized TFs involved in chloroplast retrograde signaling during stress responses. We found that CHLOROPLAST IMPORT APPARATUS 2 (CIA2) has a functional plastid transit peptide, and can be located both in chloroplasts and the nucleus. Further, we found that CIA2, along with its homolog CIA2-like (CIL) are involved in the regulation of Arabidopsis responses to UV-AB, high light and heat shock. Finally, our results suggest that both CIA2 and CIL are crucial for chloroplast translation. Our results contribute to a deeper understanding of signaling events in the chloroplast-nucleus cross-talk.
Subject: Arabidopsis thaliana
chloroplast retrograde signaling
CIA2
CIL
non&#8208
photochemical quenching
photosynthesis
thermo&#8208
and photooxidative stress tolerance
chloroplast translation
DNA-BINDING PROTEIN
SIMULATING DISEASE 1
TRANSCRIPTION FACTOR
RIBOSOMAL-PROTEINS
GENE-EXPRESSION
ULTRAVIOLET-RADIATION
ASCORBATE PEROXIDASE
ORGANELLE BIOGENESIS
ENCODED PROTEINS
SINGLET OXYGEN
11831 Plant biology
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