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园艺学报 ›› 2025, Vol. 52 ›› Issue (6): 1477-1487.doi: 10.16420/j.issn.0513-353x.2024-0084

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

番茄抗青枯病种质TK083的筛选和鉴定

方俊仪1,2, 巫伟峰1, 陆乔3,4, 凌宏清3,4, 孔丹宇1,2,*()   

  1. 1 江西省、中国科学院庐山植物园,江西九江 332800
    2 南昌大学生命科学学院,南昌 330031
    3 海南省种业实验室,海南三亚 572024
    4 中国科学院遗传与发育生物学研究所,北京 100101
  • 收稿日期:2024-01-14 修回日期:2025-03-03 出版日期:2025-06-20 发布日期:2025-06-20
  • 通讯作者:
    *E-mail:
  • 基金资助:
    国家自然科学基金地区基金项目(32260768); 江西省人才项目(jxsq2020101088); 九江市人才项目(jjsbsq2020005); 九江市基础研究计划(S2024KXJJ0001)

Screening and Identification for Bacterial Wilt Resistance Accession TK083 in Tomato

FANG Junyi1,2, WU Weifeng1, LU Qiao3,4, LING Hongqing3,4, and KONG Danyu1,2,*()   

  1. 1 Lushan Botanical Garden,Jiangxi Province and Chinese Academy of Sciences,Jiujiang,Jiangxi 332800,China
    2 School of Life Sciences,Nanchang University,Nanchang 330031,China
    3 Hainan Seed Industry Laboratory,Sanya,Hainan 572024,China
    4 Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China
  • Received:2024-01-14 Revised:2025-03-03 Published:2025-06-20 Online:2025-06-20

摘要:

在江西省北部地区对130份番茄种质进行青枯病抗性田间自然筛选,并验证了这些种质对当地优势青枯病菌菌株RS100的苗期抗性,发现TK083为优异的番茄抗青枯病种质。接种青枯病菌后,TK083木质部汁液中的青枯病菌数远低于易感型番茄‘Moneymaker’;TK083叶片中SOD和POD活性明显上升,MDA含量在接种后初期小幅上升;几丁质酶和β-1,3-GA活性分别在接种前期和后期上升,表明它们参与不同阶段的免疫反应;定量PCR结果显示参与青枯病免疫调控的SlNAP1SlERF2aSlERF3的表达量在TK083根中显著被青枯病菌诱导上调。以上结果表明TK083可能通过多个途径协同应对青枯病菌对番茄的侵染。

关键词: 番茄, 青枯病, 青枯雷尔氏菌, 种质, 抗性, 鉴定

Abstract:

In the northern part of Jiangxi Province,130 tomato accessions were naturally screened for bacterial wilt resistance,and the seedling resistance of these accessions to the local dominant Ralstonia solanacearum strain RS100 was verified,and TK083 was found to be an excellent tomato resistant to bacterial wilt accessions. After inoculation with Ralstonia solanacearum,the concentration of the pathogen in the xylem sap of TK083 was much lower than that of susceptible tomato‘Moneymaker’. The activities of SOD and POD in the leaves of TK083 increased markedly,while the MDA content showed a slight increase in the early stages post-inoculation. The activity of chitinase and β-1,3-GA increased in the early and late stages of inoculation respectively,indicating that they were involved in different stages of immune response. RT-qPCR results revealed that the expression levels of SlNAP1SlERF2a and SlERF3,which are involved in the immune regulation of bacterial wilt,were significantly up-regulated by Ralstonia solanacearum in TK083 roots. These results suggested that TK083 likely employs multiple pathways to coordinately combat the infection of Ralstonia solanacearum.

Key words: tomato, bacterial wilt, Ralstonia solanacearum, accession, resistance, identification