Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (5): 1754-1768.DOI: 10.1016/j.jia.2024.01.013

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N-肉豆蔻酰转移酶1调控黄瓜生物量积累

  

  • 收稿日期:2023-11-03 修回日期:2024-01-09 接受日期:2023-11-28 出版日期:2025-05-20 发布日期:2024-02-02

N-myristoyltransferase1 regulates biomass accumulation in cucumber (Cucumis sativus L.)

Xin Liu1*, Shuai Wang2*, Kang Zeng2, Wenjing Li2, 3, Shenhao Wang2, Sanwen Huang1#, Huasen Wang3#, Xueyong Yang2#   

  1. Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture/Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs/Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China

    State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China

    Engineering Laboratory of Genetic Improvement of Horticultural Crops of Shandong Province, College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China

  • Received:2023-11-03 Revised:2024-01-09 Accepted:2023-11-28 Online:2025-05-20 Published:2024-02-02
  • About author:Xin Liu, E-mail: lxnongkeyuan@126.com; Shuai Wang, E-mail: wangshuai03@caas.cn; #Correspondence Sanwen Huang, E-mail: huangsanwen@caas.cn; Huasen Wang, E-mail: whsych66@163.com; Xueyong Yang, E-mail: yangxueyong@caas.cn * These authors contributed equally to this study.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (32172606 to Dr. Xueyong Yang and 32302543 to Dr. Shuai Wang), the National Key Research and Development Program of China (2021YFF1000100), the Beijing Joint Research Program for Germplasm Innovation and New Variety Breeding (G20220628003-03), and the Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences (CAAS-ASTIP).  

摘要:

植物生物量作为人工选择的重要农艺性状,有助于产量提升。近年来,调控生物量形成的机制已引起广泛关注,但很大程度上仍未知,需要进一步研究。本研究中,我们筛选获得生物量显著降低的黄瓜突变体材料minicuke, 并鉴定到控制该突变表型的关键候选基因N-肉豆蔻酰基转移酶1,为拟南芥NMT1的同源基因,因此将该基因命名为CsNMT1。利用CRISPR/Cas9基因编辑系统,验证了CsNMT1在黄瓜生物量调控中的重要生物学功能。接下来,通过转录组和代谢组联合分析发现,在minicikue突变体中,木质素生物合成的重要前体物质明显降低,参与木质素合成的关键基因显著下调,推测CsNMT1可能通过调控木质素合成进而影响生物量积累。研究结果证明了NMT1在调控植物生物量中的重要作用以及在提高葫芦科作物生物量方面的潜在应用价值。

Abstract:

Plant biomass is an important agronomic trait that has been subjected to intense human selection for yield improvement.  The underlying mechanism regulating biomass formation is currently gaining increasing attention, but it remains unexplored.  In this study, we isolated a cucumber (Cucumis sativus L.) minicuke mutant with remarkably reduced biomass.  The causative gene was identified as CsNMT1, a homologue of the Arabidopsis thaliana N-myristoyltransferase1.  Our clustered regularly interspaced shot palindromic repeat-based genome editing confirmed the key role of CsNMT1 in biomass regulation.  Multi-omics analyses integrating metabolomic and transcriptomic analyses revealed the suppression of a very early step of lignin biosynthesis and the corresponding down-regulation of genes involved in lignin biosynthesis in the minicikue mutant, suggesting an unexpected pathway for regulating biomass accumulation through lignin sink strength.  Our findings demonstrate the function of NMT1 in regulating plant biomass and its potential application value for biomass improvement in cucurbits.

Key words: cucumber , biomass ,  NMT1 ,  lignin