A Chloroplast-targeted S1 RNA-binding Domain Protein Plays a Role in Arabidopsis Response to Diverse Abiotic Stresses

Although accumulating evidence points to the essential roles of nucleus-encoded chloroplast S1 domain-containing proteins (SDPs) in chloroplast RNA metabolism and plant development, functions of chloroplast SDPs in abiotic stress responses are largely unknown. In this study, we investigated the role...

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Bibliographic Details
Published in:Journal of plant biology = Singmul Hakhoe chi 2019, 62(1), , pp.74-81
Main Authors: Dinh, Sy Nguyen, Park, Su Jung, Han, Ji Hoon, Kang, Hunseung
Format: Article
Language:English
Subjects:
Abiotic stress
Abscisic acid
Arabidopsis
Biomedical and Life Sciences
Cellular stress response
Chloroplasts
Complementation
Dehydration
Freezing
Gene expression
Genes
Life Sciences
Mutants
Nuclei (cytology)
Original Article
Plant Breeding/Biotechnology
Plant Ecology
Plant Genetics and Genomics
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Proteins
Ribonucleic acid
RNA
RNA processing
rRNA
Stresses
Survival
Translation
생물학
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Summary:Although accumulating evidence points to the essential roles of nucleus-encoded chloroplast S1 domain-containing proteins (SDPs) in chloroplast RNA metabolism and plant development, functions of chloroplast SDPs in abiotic stress responses are largely unknown. In this study, we investigated the role of a SDP (At1g12800) in Arabidopsis response to diverse abiotic stresses. Analysis of the sdp knockout mutant and complementation lines demonstrated that loss of SDP function results in decreased survival rate of Arabidopsis under salt, heat, UV, or freezing stress, but not under dehydration stress or ABA. In consistent with a previous report demonstrating that SDP is involved in chloroplast rRNA processing, translation in chloroplasts was impaired in the sdp mutant. Expression of several nuclear genes involved in stress response and adaptation was altered in the sdp mutant subjected to different abiotic stresses, suggesting that modulation of chloroplast translation affects the expression of nuclear genes under abiotic stresses. These data reveal that chloroplast-localized SDP plays an important role in abiotic stress response by modulating chloroplast translation and the expression of nuclear genes possibly via unidentified plastid-to-nucleus signaling.
ISSN:1226-9239
1867-0725
DOI:10.1007/s12374-018-0325-y