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草业学报 ›› 2026, Vol. 35 ›› Issue (1): 192-205.DOI: 10.11686/cyxb2025061

• 研究论文 • 上一篇    

梭梭WOX转录因子家族鉴定及HaWOX29HaWOX54在根生长中的功能研究

孙朗1,2(), 任燕萍1,2, 娜菲莎·木则帕尔1,2, 谌能双1,2, 马丽1,2, 程聪1,2, 李俐1,2, 张桦1,2()   

  1. 1.新疆农业大学生命科学学院,新疆 乌鲁木齐 830052
    2.新疆极端环境生物生态适应与进化重点实验室,新疆 乌鲁木齐 830052
  • 收稿日期:2025-03-04 修回日期:2025-04-21 出版日期:2026-01-20 发布日期:2025-11-13
  • 通讯作者: 张桦
  • 作者简介:E-mail: hazelzhang@163.com
    孙朗(2000-),女,吉林白城人,在读硕士。E-mail: 1360146652@qq.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2024D01A70)

Identification of the WOX transcription factor family in Haloxylon ammodendron and functional analyses of the roles of HaWOX29 and HaWOX54 in root growth

Lang SUN1,2(), Yan-ping REN1,2, Muzepar NAFISA1,2, Neng-shuang SHEN1,2, Li MA1,2, Cong CHENG1,2, Li LI1,2, Hua ZHANG1,2()   

  1. 1.College of Life Sciences,Xinjiang Agricultural University,Urumqi 830052,China
    2.Key Laboratory of Biological Ecological Adaptation and Evolution in Extreme Environments,Urumqi 830052,China
  • Received:2025-03-04 Revised:2025-04-21 Online:2026-01-20 Published:2025-11-13
  • Contact: Hua ZHANG

摘要:

荒漠植物梭梭具有发达的根系,其侧根可寄生中药肉苁蓉,使得梭梭在荒漠治理和荒漠区社会发展中具有重要的生态和经济价值。WOX转录因子参与植物根的生长发育,本研究从梭梭全基因组数据中鉴定出64个WOX转录因子家族成员,根据前期转录组分析结果,筛选克隆了在根中表达量高的HaWOX29HaWOX54;qPCR分析表明,HaWOX29HaWOX54在根中的表达量明显高于其他组织,干旱、盐及高温胁迫下下调表达,低温和吲哚乙酸(IAA)、脱落酸(ABA)、水杨酸(SA)处理下上调表达;利用农杆菌介导法侵染梭梭种胚,获得过表达HaWOX29HaWOX54的植株,表型和根系扫描分析发现过表达HaWOX29的梭梭平均主根根长是转空载体对照组的2.49倍;过表达HaWOX54植株主根根长是空载体的2.08倍,平均分支数是4.34倍。因此初步推测HaWOX29基因可能参与梭梭主根的伸长,HaWOX54基因可能参与梭梭侧根的发育和主根的伸长。本研究筛选鉴定参与梭梭根生长发育的WOX转录因子,为研究梭梭根发育的分子机制和筛选优异的梭梭种质资源提供了理论和技术指导。

关键词: 梭梭, WOX转录因子, 根发育, 分子机制

Abstract:

The desert plant Haloxylon ammodendron, commonly known as sorghum or saxaul, has a well-developed root system characterized by lateral roots that are capable of parasitizing the traditional Chinese medicine plant Cistanche deserticola. This trait endows H. ammodendron with significant ecological and economic value for desert management and for the social development of desert regions. In plants, WOX transcription factors play a crucial role in the growth and development of roots. In this study, we identified 64 members of the WOX transcription factor family from the H. ammodendron genome. Building upon previous transcriptome analysis results, we screened and cloned the genes HaWOX29 and HaWOX54, which exhibited high transcript levels in the roots. Quantitative PCR analysis indicated that the transcript levels of HaWOX29 and HaWOX54 were obvious higher in roots than in other tissues, and that both of these genes were down-regulated under drought, salt, and high-temperature stresses. Conversely, they were up-regulated under low-temperature conditions and treatments with various hormones, namely indole-3-acetic acid, abscisic acid, and salicylic acid. Through Agrobacterium-mediated transformation, we obtained plants overexpressing HaWOX29 and HaWOX54. Phenotypic and root scanning analyses revealed that the average primary root length of the HaWOX29-overexpressing plants was 2.49-times than that of the control group (transformed with the empty vector). The primary roots of the HaWOX54-overexpressing plants were 2.08-times longer than those of the control group, and the average root branching number was 4.34-times greater. Thus, we concluded that HaWOX29 may facilitate the elongation of primary roots in H. ammodendron, while HaWOX54 may be implicated in the development of lateral roots and the elongation of primary roots. The results of this study identify WOX transcription factors associated with the growth and development of H. ammodendron roots, offering theoretical and practical guidance for investigating the molecular mechanisms underlying root development and for screening superior germplasm resources of H. ammodendron.

Key words: Haloxylon ammodendron, WOX transcription factors, root development, molecular mechanisms