Leucine-rich repeat-receptor-like kinases (LRR-RLKs) are major gene families that play an important role in in many aspects of plant growth and development particularly in the process of signal transmission. RLK XYLEM INTERMIXED WITH PHLOEM 1 (XIP1)/C-TERMINALLY ENCODED PEPTIDE (CEP) RECEPTOR 1 (CEPR1) has been identified as a leucine-rich repeat (LRR) receptor kinase. In this study, the MdCEPR1 gene (GenBank ID: DQ221207) from apple (Malus × domestica), was isolated and characterized. MdCEPR1 transcripts were highly accumulated in roots and leaves, and MdCEPR1 was significantly induced under low nitrate conditions. In addition, suppressing the MdCEPR1 gene in apple calli increased anthocyanin content. Overexpression of MdCEPR1 promoted growth of apple calli and Arabidopsis thaliana under low nitrate condition by increasing nitrate assimilation and up regulating the expression of genes involved in nitrate assimilation. Ectopic expression of MdCEPR1 also promoted lateral root development in transgenic Arabidopsis. Taken together, our results indicated that MdCEPR1 acts as a positive regulator of plant nitrate utilization and lateral root development.
In this study, the MdCEPR1 gene from apple, was isolated and characterized, and our results indicated that MdCEPR1 acts as a positive regulator of plant nitrate utilization and lateral root development. MdCEPR1 may be a useful target for marker-assisted breeding to improve crop yield and reduce the use of chemical fertilizer.
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We thank Ministry of Agriculture (CARS-27), Shandong Province (SDAIT-06-03, J18KA174), Natural Science Foundation of Shandong Province (ZR2011CQ007) and NSFC (31471854, 31601742) for funding to support this work.
Coomunicated by Henryk Flachowsky.
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Li, R., An, J., You, C. et al. Molecular cloning and functional characterization of the CEP RECEPTOR 1 gene MdCEPR1 of Apple (Malus × domestica). Plant Cell Tiss Organ Cult 140, 539–550 (2020). https://doi.org/10.1007/s11240-019-01745-w
- Anthocyanin biosynthesis
- Nitrate response