Please use this identifier to cite or link to this item: https://doi.org/10.3390/ijms22041673
Title: Oscrp1, a ribonucleoprotein gene, regulates chloroplast mrna stability that confers drought and cold tolerance
Authors: Bang, Seung Woon
Lee, Ho Suk
Park, Su-Hyun 
Lee, Dong-Keun
Seo, Jun Sung
Kim, Youn Shic
Park, Soo-Chul
Kim, Ju-Kon
Keywords: Chloroplast ribonucleoproteins
Cold tolerance
Drought tolerance
NAD(P)H dehydrogenase (NDH) complex
Oryza sativa
OsCRP1
Issue Date: 7-Feb-2021
Publisher: MDPI AG
Citation: Bang, Seung Woon, Lee, Ho Suk, Park, Su-Hyun, Lee, Dong-Keun, Seo, Jun Sung, Kim, Youn Shic, Park, Soo-Chul, Kim, Ju-Kon (2021-02-07). Oscrp1, a ribonucleoprotein gene, regulates chloroplast mrna stability that confers drought and cold tolerance. International Journal of Molecular Sciences 22 (4) : 1-16. ScholarBank@NUS Repository. https://doi.org/10.3390/ijms22041673
Rights: Attribution 4.0 International
Abstract: Chloroplast ribonucleoproteins (cpRNPs) are nuclear-encoded and highly abundant proteins that are proposed to function in chloroplast RNA metabolism. However, the molecular mechanisms underlying the regulation of chloroplast RNAs involved in stress tolerance are poorly un-derstood. Here, we demonstrate that CHLOROPLAST RNA-BINDING PROTEIN 1 (OsCRP1), a rice (Oryza sativa) cpRNP gene, is essential for stabilization of RNAs from the NAD(P)H dehydrogenase (NDH) complex, which in turn enhances drought and cold stress tolerance. An RNA-immunopre-cipitation assay revealed that OsCRP1 is associated with a set of chloroplast RNAs. Transcript profiling indicated that the mRNA levels of genes from the NDH complex significantly increased in the OsCRP1 overexpressing compared to non-transgenic plants, whereas the pattern in OsCRP1 RNAi plants were opposite. Importantly, the OsCRP1 overexpressing plants showed a higher cyclic electron transport (CET) activity, which is essential for elevated levels of ATP for photosynthesis. Ad-ditionally, overexpression of OsCRP1 resulted in significantly enhanced drought and cold stress tolerance with higher ATP levels compared to wild type. Thus, our findings suggest that overex-pression of OsCRP1 stabilizes a set of mRNAs from genes of the NDH complex involved in increasing CET activity and production of ATP, which consequently confers enhanced drought and cold tolerance. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Source Title: International Journal of Molecular Sciences
URI: https://scholarbank.nus.edu.sg/handle/10635/232838
ISSN: 1661-6596
DOI: 10.3390/ijms22041673
Rights: Attribution 4.0 International
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