Cloning and Functional Characterization of LlAS1 in Lilium lancifolium

IF 3.9 3区 生物学 Q1 PLANT SCIENCES Journal of Plant Growth Regulation Pub Date : 2024-07-02 DOI:10.1007/s00344-024-11381-0
Yuxiao Qu, Panpan Yang, Mengmeng Bi, Leifeng Xu, Jun Ming
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Abstract

Bulbils, originating from axillary meristem, are known to have a significant impact on the propagation of Lilium lancifolium. Transcription factor ASYMMETRIC LEAVES 1 has been shown to be involved in the regulation of bulbil formation based on the transcriptome data of L. lancifolium. The present investigation involved the cloning of the LlAS1 gene from L. lancifolium by RT-PCR and further be characterized. The open reading frame of LlAS1 comprised 1035 bp, which encoded 344 amino acids. The LlAS1 protein contained two conserved SANT domains in series at the N-terminus. Phylogenetic analysis revealed that LlAS1 belongs to the monocot group and was closely related to the AS1 of Musa acuminata subsp. malaccensis. Expression analysis showed that LlAS1 was strongly expressed in bulbil, especially in primary bulbils. It was highly expressed during the process of bulbil primordium establishment and bulbil formation. Transient overexpression and virus-induced gene silencing (VIGS) of LlAS1 in leaf axils significantly promoted and inhibited bulbil formation of L. lancifolium, respectively. The findings of the study indicated that LlAS1 was positively correlated with bulbil formation of L. lancifolium, laying a foundation for further understanding the regulation of LlAS1 gene for bulbil formation and application in molecular genetic improvement of lilies.

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百合花中 LlAS1 的克隆和功能表征
众所周知,源于腋生分生组织的球茎对百合花的繁殖有重要影响。根据 L. lancifolium 的转录组数据,转录因子 ASYMMETRIC LEAVES 1 被证明参与了球茎形成的调控。本研究通过 RT-PCR 方法从 L. lancifolium 中克隆了 LlAS1 基因,并对其进行了进一步表征。LlAS1 的开放阅读框为 1035 bp,编码 344 个氨基酸。LlAS1 蛋白在 N 端包含两个串联的保守 SANT 结构域。系统进化分析表明,LlAS1属于单子叶植物,与Musa acuminata subsp.表达分析表明,LlAS1在球茎特别是初级球茎中强表达。在球茎原基建立和球茎形成过程中,它的表达量很高。LlAS1在叶腋中的瞬时过表达和病毒诱导基因沉默(VIGS)分别显著促进和抑制了L.lancifolium的球茎形成。研究结果表明,LlAS1与L. lancifolium的球茎形成呈正相关,为进一步了解LlAS1基因对球茎形成的调控作用以及在百合分子遗传改良中的应用奠定了基础。
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来源期刊
CiteScore
8.40
自引率
6.20%
发文量
312
审稿时长
1.8 months
期刊介绍: The Journal of Plant Growth Regulation is an international publication featuring original articles on all aspects of plant growth and development. We welcome manuscripts reporting question-based research on various aspects of plant growth and development using hormonal, physiological, environmental, genetic, biophysical, developmental and/or molecular approaches. The journal also publishes timely reviews on highly relevant areas and/or studies in plant growth and development, including interdisciplinary work with an emphasis on plant growth, plant hormones and plant pathology or abiotic stress. In addition, the journal features occasional thematic issues with special guest editors, as well as brief communications describing novel techniques and meeting reports. The journal is unlikely to accept manuscripts that are purely descriptive in nature or reports work with simple tissue culture without attempting to investigate the underlying mechanisms of plant growth regulation, those that focus exclusively on microbial communities, or deal with the (elicitation by plant hormones of) synthesis of secondary metabolites.
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