Abstract
DEAD-box RNA helicases regulate growth, development, and stress response of plants. In this study, a gene encoding a DEAD-box RNA helicase, GhRH32, was identified in upland cotton (Gossypium hirsutum L.). Gene silencing experiments demonstrated that GhRH32 functions as a negative regulator in cold tolerance. ATPase activity and ATP content analysis revealed that GhRH32 regulates ATP supply. Subcellular localization analysis showed that GhRH32 is targeted to the nucleus. Furthermore, we found that GhRH32 interacts with GhCBF, and the expression of CBF pathway genes increased in plants that were subjected to virus induced gene silencing (VIGS). Taken together, our results indicate that GhRH32 could be a potential molecular target to improve cold tolerance in plants.
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Acknowledgements
This work was supported by the Special Fund for Agro-scientific Research in the Public Interest (Grant No. 201503117).
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CG and CP designed the experiments and wrote the manuscript. YY and LW performed the most experiments and analyzed the data. YZ, SZ and SL performed the VIGS experiments. SDL and JC performed the ATPase activity and ATP content assay. QS and RL helped perform the analysis with constructive discussions. HM, YL and XZ revised the manuscript. All authors read and approved the final manuscript.
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Accession Numbers
Sequence data from this article can be found in the Cotton FGD database. (https://cottonfgd.org) under the following accession numbers: GhRH32: Gh_A04G0154; GhCBF: Gh_A09G0380; GhCBF1: Gh_A12G2357; GhCBF2: Gh_D12G2494; GhCBF3: Gh_D11G0085; GhCBF4: Gh_A03G2017; GhCRPK1: Gh_D01G0308.
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Ge, Cw., Yang, Yf., Wang, L. et al. GhRH32 negatively regulates cold tolerance in upland cotton (Gossypium hirsutum L.). Plant Growth Regul 91, 201–208 (2020). https://doi.org/10.1007/s10725-020-00599-z
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DOI: https://doi.org/10.1007/s10725-020-00599-z