Identification and function of miRNA-mRNA interaction pairs during lateral root development of hemi-parasitic Santalum album L. seedlings
文献类型: 外文期刊
第一作者: Li, Yuan
作者: Li, Yuan;Xiong, Yuping;Zhang, Xinhua;Ma, Guohua;Li, Yuan;Xiong, Yuping;Zhang, Xinhua;Ma, Guohua;Li, Yuan;Xiong, Yuping;Zhang, Xinhua;Ma, Guohua;Jin, Feng;Wu, Xiuju;da Silva, Jaime A. Teixeira
作者机构:
关键词: Sandalwood; Parasitic root; Lateral root formation; MicroRNA; Indole-3-acetic acid
期刊名称:JOURNAL OF PLANT PHYSIOLOGY ( 影响因子:3.686; 五年影响因子:4.352 )
ISSN: 0176-1617
年卷期: 2023 年 280 卷
页码:
收录情况: SCI
摘要: Sandalwood (Santalum album L.) is a hemi-parasitic tree species famous for its santalol and santalene, which are extracted from its heartwood and roots. The ability to understand root functionality within its branched root system would benefit the regulation of sandalwood growth and enhance the commercial value of sandalwood. Phenotypic and anatomical evidence in this study indicated that seed germination stage 4 (SG4) seemed pivotal for lateral root (LR) morphogenesis. Small RNA (sRNA) high-throughput sequencing of root tissues at three substages of SG4 (lateral root primordia initiation (LRPI), lateral root primordia development (LRPD), and lateral root primordia emergence (LRPE)) was performed to identify microRNAs (miRNAs) associated with LR development. A total of 135 miRNAs, including 70 differentially expressed miRNAs (DEMs), were screened. Ten DEMs were selected to investigate transcript abundance in different organs or developmental stages. Among 100 negative DEM-mRNA interaction pairs, four targets (Sa-miR166m_2, 408d, 858a, and novel_Sa-miR8) were selected for studying cleavage sites by 5 ' RLM-RACE validation. The expression mode of the four miRNA-mRNA pairs was investigated after indole-3-acetic acid (IAA) treatment. IAA enhanced the abundance of homeoboxleucine-zipper protein 32 (HOX32), laccase 12 (LAC12), myeloblastosis86 (MYB86), and pectin methylesterase inhibitor6 (PMEI6) target transcripts by reducing the expression of Sa-miR166m_2, 408d, 858a, and novel_SamiR8 in the first 10 min. A schematic model of miRNA-regulated LR development is proposed for this hemiparasitic species. This novel genetic information for improving sandalwood root growth and development may allow for the cultivation of fast-growing and high-yielding plantations.
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