,Degradome sequencing reveals endogenous small RNA targets in rice (Oryza sativa L. ssp. indica)

来源 :中国高等学校学术文摘·生物学 | 被引量 : 0次 | 上传用户:rwteng
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MicroRNAs (miRNAs) and small interfering RNAs (siRNAs) regulate gene expression in eukaryotes.Plant miRNAs modulate their targets mainly via messen-ger RNA (mRNA) cleavage. Small RNA (sRNA) targets have been extensively investigated in Arabidopsis using computational prediction, experimental validation, and degradome sequencing. However, small RNA targets are largely unknown in rice (Oryza sativa). Here, we report global identification of small RNA targets using high throughput degradome sequencing in the rice indica cultivar 93-11 (Oryza sativa L. ssp. indica). One hundred and seventy-seven transcripts targeted by a total of 87 unique miRNAs were identified. Of targets for the conserved miRNAs between Arabidopsis and rice, tran-scription factors comprise around 70% (58 in 82),indicating that these miRNAs act as masters of gene regulatory nodes in rice. In contrast, non-conserved miRNAs targeted diverse genes which provide more complex regulatory networks. In addition, 5 AUXIN RESPONSE FACTORs (ARFs) cleaved by the TAS3 derived ta-siRNAs were also detected. A total of 40 sRNA targets were further validated via RNA ligase-mediated 5’ rapid amplification of eDNA ends (RLM 5’-RACE). Our degradome results present a detailed sRNA-target interaction atlas, which provides a guide for the study of the roles of sRNAs and their targets in rice.
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