Abstract
Plant microRNAs modulate diverse developmental processes by regulating expression of their target genes. To explore potential miRNA-guided gene regulation in developing rice (Oryza sativa L.) caryopses, a miRNA microarray was used to identify miRNAs present at the different developmental stages. We found that 27 miRNAs, of which 16 were conserved miRNAs, were present in developing caryopses. High expression levels were detected for miR159, miR167, and miR530 at the morphogenesis stage and for miR169, miR435, and miR528 at the stage of accumulation of metabolites. Next, 26 target genes were predicted for seven of the detected miRNAs and the expression profiles of these miRNAs and their corresponding target genes were examined in developing caryopses. Our results suggest that the miRNAs and their target genes examined at the two distinct stages could contribute to the developmental progress of rice caryopses in concert with phytohormone signalling.
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Abbreviations
- ABA:
-
abscisic acid
- ARF:
-
auxin response factor
- ASO:
-
L-ascorbate oxidase
- DAF:
-
days after fertilisation
- DAH:
-
days after heading
- GAP:
-
GTPase activating protein
- GPCR:
-
G protein-coupled receptor
- LRR:
-
leucine-rich repeat
- PCD:
-
programmed cell death
- snRNA:
-
small nuclear RNA
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Acknowledgments: This work was supported by the National Natural Science Foundation of China (No. 30570148).
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Liu, H., Shen, D., Jia, S. et al. Microarray-based screening of the microRNAs associated with caryopsis development in Oryza sativa . Biol Plant 57, 255–261 (2013). https://doi.org/10.1007/s10535-012-0270-4
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DOI: https://doi.org/10.1007/s10535-012-0270-4