浙江农业学报 ›› 2026, Vol. 38 ›› Issue (4): 707-719.DOI: 10.3969/j.issn.1004-1524.20250293

• 植物保护 • 上一篇    下一篇

雪茄烟赤星病病原菌鉴定及其对雪茄烟品种的致病性

李硕1(), 陈涛2, 顾钢3, 胡忠良2, 潘羲2, 阴长林2, 黄姗2, 梁皓祎1, 肖顺1, 林智慧2,*(), 刘国坤1,*()   

  1. 1 福建农林大学 植物保护学院, 福建 福州 350002
    2 福建省烟草公司三明市公司, 福建 三明 365000
    3 福建省烟草公司 烟草科学研究所, 福建 福州 350003
  • 收稿日期:2025-04-11 出版日期:2026-04-25 发布日期:2026-05-08
  • 作者简介:林智慧,E-mail:lin4636@163.com
    刘国坤,E-mail:liuguok@126.com;
    李硕,主要从事雪茄烟病害病原菌鉴定与防控研究。E-mail:2774594440@qq.com
  • 通讯作者: 林智慧,刘国坤
  • 基金资助:
    中国烟草总公司福建省科技计划项目(202335000020097);中国烟草总公司重大科技项目计划(110202201028(LS-12))

Identification of pathogens causing brown spot disease on cigar tobacco and their pathogenicity to cigar tobacco varieties

LI Shuo1(), CHEN Tao2, GU Gang3, HU Zhongliang2, PAN Xi2, YIN Changlin2, HUANG Shan2, LIANG Haoyi1, XIAO Shun1, LIN Zhihui2,*(), LIU Guokun1,*()   

  1. 1 College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    2 Sanming Tobacco Company of Fujian Province, Sanming 365000, Fujian, China
    3 Institute of Tobacco Science, Fujian Provincial Tobacco Company, Fuzhou 350003, China
  • Received:2025-04-11 Published:2026-04-25 Online:2026-05-08
  • Contact: LIN Zhihui,LIU Guokun

摘要:

由链格孢(Alternaria spp.)引起的赤星病是烤烟上的重要病害,但针对雪茄烟赤星病病原菌种类的研究较少。本研究旨在明确福建三明地区雪茄烟赤星病的病原菌种类及其对雪茄烟品种的致病性。从三明地区雪茄烟栽培种海研101上采集赤星病样本,在PDA培养基上进行病原菌分离与纯化,通过形态学与分子生物学方法[多基因(ITSTEF1、RPB2、GAPDHAlta1)系统发育分析和His3单基因补充分析]相结合进行病原菌鉴定。结果表明,45个分离物分属4个种:9株为交链格孢(Alternaria alternata),21株为细极链格孢(Alternaria tenuissima),12株为长柄链格孢(Alternaria longipes),3株为梨黑斑链格孢(Alternaria gaisen)。盆栽致病性测定表明,接种海研101 3 d后,4种链格孢菌均可在叶片上产生圆形褐色病斑,其中长柄链格孢的致病性最强,梨黑斑链格孢的致病性最弱;梨黑斑链格孢引起烟草赤星病为首次报道。田间接种试验表明:细极链格孢和长柄链格孢对雪茄烟5个品种(海研101、QX107、QX105、CX80和QX103)的致病性均强;交链格孢对品种QX107、QX105致病性弱,但对其他3个品种致病性强;梨黑斑链格孢对5个品种致病性均弱。本研究结果对雪茄烟赤星病的防控与抗病品种选育具有指导意义。

关键词: 雪茄烟, 赤星病, 链格孢, 病原菌鉴定, 致病性, 多基因系统发育分析, 品种抗性

Abstract:

Brown spot disease caused by Alternaria spp. is an important disease on flue-cured tobacco, but there are few studies on the pathogen species causing brown spot on cigar tobacco. This study aimed to clarify the pathogen species causing brown spot on cigar tobacco in Sanming region of Fujian Province and their pathogenicity to cigar tobacco varieties. Brown spot samples were collected from the cigar tobacco Haiyan 101 grown in the Sanming region. Pathogens were isolated and purified on PDA medium. Identification was performed by combining morphological and molecular biological methods [multigene (ITS, TEF1, RPB2, GAPDH, Alta1) phylogenetic analysis and His3 single-gene supplementary analysis]. The results showed that the 45 isolates belonged to four species: 9 were Alternaria alternata, 21 were Alternaria tenuissima, 12 were Alternaria longipes, and 3 were Alternaria gaisen. Pot inoculation pathogenicity tests showed that 3 d after inoculating Haiyan 101, all four Alternaria species could produce circular brown lesions on leaves. Among them, A. longipes exhibited the strongest pathogenicity, while A. gaisen showed the weakest pathogenicity. This is the first report of A. gaisen causing tobacco brown spot disease. Field inoculation tests showed that A. tenuissima and A. longipes were highly pathogenic to all five cigar tobacco varieties (Haiyan 101, QX107, QX105, CX80 and QX103). A. alternata showed weak pathogenicity to varieties QX107 and QX105 but strong pathogenicity to the other three varieties. A. gaisen showed weak pathogenicity to all five varieties. The findings of this study provided guidance for the control of brown spot disease on cigar tobacco and the breeding of resistant varieties.

Key words: cigar tobacco, brown spot disease, Alternaria spp., pathogen identification, multi-gene phylogenetic analysis, pathogenicity determination, variety resistance

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