浙江农业学报 ›› 2026, Vol. 38 ›› Issue (3): 506-519.DOI: 10.3969/j.issn.1004-1524.20250207

• 植物保护 • 上一篇    下一篇

甘草种带真菌的分离、鉴定及其致病性测定

陈润丽1(), 刘朋飞1, 唐思银2, 楼兵干1,*()   

  1. 1. 浙江大学 生物技术研究所, 农业农村部作物病虫分子生物学重点实验室, 浙江 杭州 310058
    2. 新疆华方中草药有限公司, 新疆 尉犁 841500
  • 收稿日期:2025-03-20 出版日期:2026-03-25 发布日期:2026-04-17
  • 作者简介:*楼兵干,E-mail:bglou@zju.edu.cn
    陈润丽,研究方向为植物真菌病害。E-mail:22316246@zju.edu.cn
  • 通讯作者: 楼兵干
  • 基金资助:
    新疆华方中草药有限公司资助项目

Isolation, identification and pathogenicity determination of seed-borne fungi in Glycyrrhiza uralensis Fisch.

CHEN Runli1(), LIU Pengfei1, TANG Siyin2, LOU Binggan1,*()   

  1. 1. Ministry of Agriculture and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
    2. Xinjiang Huafang Chinese Herbal Medicine Co., Ltd., Yuli 841500, Xinjiang, China
  • Received:2025-03-20 Published:2026-03-25 Online:2026-04-17
  • Contact: LOU Binggan

摘要:

甘草主要产于我国西北地区,具有重要的药用价值,是我国传统中草药之一。在人工种植区,甘草种子发芽率低、出苗率低且苗期病害普遍较重,严重制约产业发展。为明确甘草种带真菌对种子发芽和出苗的影响,对来自新疆、内蒙古、陕西和甘肃19个地区的甘草种子所携带真菌进行分离纯化,通过形态学与分子生物学鉴定,发现主要种带真菌为少根根霉(Rhizopus arrhizus)、黄曲霉(Aspergillus flavus)、黑曲霉(Aspergillus niger)、细极链格孢(Alternaria tenuissima)、新棒状拟盘多毛孢(Neopestalotiopsis clavispora)和木贼镰刀菌(Fusarium equiseti)。平皿致病性试验表明,接种少根根霉、黑曲霉和黄曲霉孢子悬浮液对甘草成苗率影响较大,当每粒种子表面孢子负荷量为5个时,即可导致甘草成苗率显著降低;新棒状拟盘多毛孢和细极链格孢在每粒种子孢子负荷量达300个时可显著降低成苗率,而木贼镰刀菌孢子在每粒种子负荷量达600个时对成苗率无显著影响。盆栽致病性试验结果表明,仅少根根霉和黄曲霉对甘草出苗率和成苗率有显著影响:每粒种子少根根霉孢子负荷量达50个时即可导致出苗率和成苗率下降;每粒种子黄曲霉孢子负荷量达300个时,对出苗率、成苗率、株高、根长和生物量均有显著抑制作用。综上,甘草种带真菌中少根根霉和黄曲霉是导致出苗率和成苗率下降的优势种群,本研究结果为甘草苗期病害的防控提供了技术依据。

关键词: 甘草, 少根根霉, 黄曲霉, 苗期病害, 种带真菌

Abstract:

Glycyrrhiza uralensis Fisch., a valuable traditional Chinese herb primarily cultivated in northwest China, faces challenges including low seed germination, poor seedling emergence, and susceptibility to disease during the seedling stage, which hinder its industrial development. To assess the influence of seed-associated fungi on the germination and seedling establishment of licorice, fungal communities from G. uralensis Fisch. seeds collected across 19 sites in Xinjiang, Inner Mongolia, Shaanxi, and Gansu were isolated, characterized using morphological and molecular methods, the dominant fungi identified were Rhizopus arrhizus, Aspergillus flavus, Aspergillus niger, Alternaria tenuissima, Neopestalotiopsis clavispora, and Fusarium equiseti. Petri dish assays indicated that R. arrhizus, A. niger, and A. flavus significantly reduced seedling establishment at an inoculum level of 5 spores per seed, whereas N. clavispora and A. tenuissima required 300 spores per seed to produce a similar effect. The seedling emergence rate of licorice remained unaffected even when the spore load of F. equiseti reached 600 per seed. Pot-based pathogenicity tests further demonstrated that only R. arrhizus and A. flavus significantly affected the emergence and establishment rates of licorice seedlings. At a spore load of 50 spores per seed of R. arrhizus, both the emergence rate and seedling establishment rate of licorice decreased. When the spore load of A. flavus reached 300 spores per seed, significant impacts were observed on the emergence rate, seedling establishment rate, plant height, root length and biomass of licorice. This study provided essential technical support for the prevention and control of seedling diseases in licorice cultivation.

Key words: Glycyrrhiza uralensis Fisch., Rhizopus arrhizus, Aspergillus flavus, seedling disease, seed-borne fungi

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