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山东农业大学/山东省农业科学院院长团队在经典植物病理学期刊发表研究论文!揭示了番茄褐色皱果病毒逃逸Tm-22介导的抗性机制

  • 2026-03-29 23:05:30
山东农业大学/山东省农业科学院院长团队在经典植物病理学期刊发表研究论文!揭示了番茄褐色皱果病毒逃逸Tm-22介导的抗性机制

2026年3月19日,山东农业大学/山东省农业科学院院长李向东教授团队在Molecular Plant Pathology在线发表了题为“Tomato Brown Rugose Fruit Virus Evades Tm-22-Mediated Resistance by Avoiding the Induction of Tm-22Self-Association”的研究论文,揭示了番茄褐色皱果病毒(tomato brown rugose fruit virus,ToBRFV)逃逸Tm-22介导的抗性的机制。

番茄褐色皱果病毒(ToBRFV)能够逃逸Tm-22介导的抗性,对全球番茄生产构成严重威胁。团队前期研究结果发现,MP的关键氨基酸残基(H67、N125、K129、A134、I147和I168)对ToBRFV逃逸Tm-22抗性至关重要(Yan et al., 2021),但其抗性逃逸机制仍不清楚。

结果表明,在Tm-22转基因本氏烟感染后期,MP突变体H67C、N125A、K129Q和A134N使ToBRFV-GFP丧失了细胞间与系统移动能力;I168N仅丧失了系统移动能力;而I147M则使这两种移动能力均部分受损。相应地,MPH67C、MPN125A、MPK129Q和MPA134N突变体引发了强烈的Tm-22介导的过敏性坏死反应(hypersensitive response,HR),MPI168N引发的HR较弱,而MPI147M未引发HR。激光共聚焦显微镜观察显示,在Tm-22转基因本氏烟叶片中,I147M减少了MP在胞间连丝的定位。互作分析表明,野生型MP和I147M与Tm-22的相互作用较弱(I147M略有增强),而I168N及其他四个突变体的互作强度则呈现中度或显著增强。野生型MP和MPI147M不能诱导Tm-22发生自聚集,MPI168N仅能诱导其微弱自聚集,其余四个突变体则能显著诱导Tm-22自聚集。

本研究表明ToBRFV通过减弱MP与Tm-22的互作强度,避免引发Tm-22自聚集及下游免疫激活,从而成功逃逸Tm-22介导的抗性。

图1. ToBRFV逃逸Tm-2介导抗性的机制

山东农业大学博士研究生马华玉、硕士研究生刘祎洁以及博士研究生郇晓雪为该论文的共同第一作者,李向东教授和闫志勇副教授为该论文的通讯作者,田延平教授、包志龙教授参与了研究工作。清华大学刘玉乐教授提供了Tm-22转基因本氏烟种子。该研究得到了国家自然科学基金、中国博士后科学基金、山东省自然科学基金、山东省重点研发计划、泰山学者建设工程、山东省农业科学院农业科技创新工程等项目的支持。

论文链接:

https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/mpp.70243

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  1. CONNECT:[ UseTime:0.000714s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000685s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000295s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000260s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000485s ]
  6. SELECT * FROM `set` [ RunTime:0.000200s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000498s ]
  8. SELECT * FROM `article` WHERE `id` = 500072 LIMIT 1 [ RunTime:0.000378s ]
  9. UPDATE `article` SET `lasttime` = 1774822214 WHERE `id` = 500072 [ RunTime:0.009987s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000287s ]
  11. SELECT * FROM `article` WHERE `id` < 500072 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000468s ]
  12. SELECT * FROM `article` WHERE `id` > 500072 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001432s ]
  13. SELECT * FROM `article` WHERE `id` < 500072 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000665s ]
  14. SELECT * FROM `article` WHERE `id` < 500072 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002768s ]
  15. SELECT * FROM `article` WHERE `id` < 500072 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000823s ]
0.145257s