华北农学报 ›› 2025, Vol. 40 ›› Issue (6): 92-99. doi: 10.7668/hbnxb.20195829

所属专题: 生物技术

• 作物遗传育种·种质资源·生物技术 • 上一篇    下一篇

钩藤开花相关基因UrAP1的克隆及表达分析

李玉琼1, 覃雅1, 黄秋兰2, 沈洁3, 杨翠红1, 梁文静1, 韦树根1, 潘丽梅1, 桂凌健1, 付金娥1, 李林轩1, 万凌云1   

  1. 1 广西壮族自治区药用植物园,广西道地药材高品质形成与应用重点实验室,广西中药材良种繁育技术创新中心,国家中医药传承创新中心,广西 南宁 530023
    2 宜宾学院 农林与食品工程学部,四川 宜宾 644000
    3 广西医科大学 药学院,广西 南宁 530021
  • 收稿日期:2025-02-20 出版日期:2025-12-31
  • 通讯作者:
    万凌云(1984—),男,江西铅山人,副研究员,博士,主要从事中药资源与分子生药学研究。
  • 作者简介:

    李玉琼(1998—),女,广西平桂人,初级工程师,硕士,主要从事植物分子生物学研究。

    李玉琼、覃雅为同等贡献作者。

  • 基金资助:
    国家自然科学基金项目(82360753); 国家自然科学基金项目(81903752); 广西自然科学基金项目(2019GXNSFBA185026); 广西药用植物园重点研发项目(桂药重202401); 广西特色药材关键技术研究推广项目(GZKJ2314); 广西药用植物园科研基金项目(桂药基202013); 广西中药材品质创新研究团队项目(GZKJ2305)

Cloning and Expression Analysis of the Flowering Related Gene UrAP1 in Uncaria rhynchophylla

LI Yuqiong1, QIN Ya1, HUANG Qiulan2, SHEN Jie3, YANG Cuihong1, LIANG Wenjing1, WEI Shugen1, PAN Limei1, GUI Lingjian1, FU Jine1, LI Linxuan1, WAN Lingyun1   

  1. 1 Guangxi Botanical Garden of Medicinal Plants,Guangxi Key Laboratory of High-Quality Formation and Utilization of Dao-Di Herbs,Guangxi Innovation Center for Breeding Technology of Traditional Chinese Medicine,National Center for Inheritance and Innovation of Traditional ChineseMedicine,Nanning 530023,China
    2 Faculty of Agriculture,Forestry and Food Engineering,Yibin University, Yibin 644000,China
    3 College of Pharmacy,Guangxi Medical University,Nanning 530021,China
  • Received:2025-02-20 Published:2025-12-31

摘要: 钩藤生殖生长时茎钩转换为花序梗,导致茎钩产量降低,为确定钩藤茎钩与花序梗器官同源转换的关键调控因子,以钩藤茎钩及花组织为材料,克隆其花分生组织基因UrAP1(APETALA1)。随后对该基因开展了生物信息学解析,深入探究其编码产物的理化特性。同时,借助qRT-PCR技术,检测了UrAP1基因在钩藤营养枝与生殖枝不同部位的相对表达丰度,以期阐明其在花器官发育中的功能及其调控网络。结果显示:UrAP1基因的编码区(CDS)长度为729 bp,可编码一个包含242个氨基酸组成的蛋白质;该序列与西洋参AP1基因具有高度同源性(相似度达94%),且包含保守的MADS结构域和K-box基序;此外,UrAP1编码的蛋白质不具备跨膜结构域,且定位于细胞核。UrAP1基因在钩藤营养枝条的叶、茎、茎节和茎钩中具有一定程度的表达且整体呈现稳定的状态;而在钩藤生殖枝条的叶、茎、茎节、花序梗和花蕾的相对表达量有着显著差异,其中幼蕾花期相对表达量达到最高,随花蕾的老化呈降低趋势。通过比较UrAP1基因在钩藤2种生长型枝条中的表达模式,推测UrAP1基因在调控钩藤花芽分化过程中发挥重要作用。

关键词: 钩藤, UrAP1基因, 生物信息学, 基因表达, 克隆

Abstract:

During the reproductive phase of Uncaria rhynchophylla,stem hooks undergo conversion into peduncles,consequently diminishing stem hook yield.To identify key regulatory factors governing this organ homology shift between stem hooks and peduncles in U.rhynchophylla,tissues from stem hooks and flowers were utilized to isolate its floral meristem gene,UrAP1(APETALA1).Comprehensive bioinformatic characterization was subsequently performed to elucidate the physicochemical properties of its encoded product.Concurrently,qRT-PCR analysis was conducted to quantifiy the relative transcript abundance of UrAP1 across distinct tissues of vegetative and reproductive branches,aiming to clarify its functional role and regulatory network in floral organogenesis.Results demonstrated that the UrAP1 coding sequence (CDS) spanned 729 bp,encoding a 242 amino acid polypeptide.This sequence exhibited substantial homology(94% identity) with the AP1 gene from Cephalanthus occidentalis and harbored conserved MADS-box and K-box domains.Furthermore,the UrAP1 protein lacked transmembrane domains,with primary localization predicted within the nucleus.UrAP1 expression was detectable and relatively stable across leaves,stems,stem nodes,and stem hooks of vegetative shoots.In contrast,its transcript levels varied significantly in reproductive shoots,showing distinct abundances in leaves,stems,stem nodes,peduncles,and flower buds.Expression peaked in young buds during early flowering stages and subsequently declined as buds matured.Comparison of the expression profiling between the two growth phases suggests a crucial role of UrAP1 in regulating floral bud differentiation in U.rhynchophylla.

Key words: Uncaria rhynchophylla, UrAP1 gene, Bioinformatics, Gene expression, Cloning

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引用本文

李玉琼, 覃雅, 黄秋兰, 沈洁, 杨翠红, 梁文静, 韦树根, 潘丽梅, 桂凌健, 付金娥, 李林轩, 万凌云. 钩藤开花相关基因UrAP1的克隆及表达分析[J]. 华北农学报, 2025, 40(6): 92-99. doi: 10.7668/hbnxb.20195829.

LI Yuqiong, QIN Ya, HUANG Qiulan, SHEN Jie, YANG Cuihong, LIANG Wenjing, WEI Shugen, PAN Limei, GUI Lingjian, FU Jine, LI Linxuan, WAN Lingyun. Cloning and Expression Analysis of the Flowering Related Gene UrAP1 in Uncaria rhynchophylla[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(6): 92-99. doi: 10.7668/hbnxb.20195829.