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Updated: Feb 12, 2026

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尼奥福西科克姆 (Neofusicoccum laricinum) 通过协调的细胞壁降解和抗氧化剂抑制来破坏虫的防御
Yongfeng Yang1, Shifen Tang1, Ning Kong1
1College of Forestry, Shenyang Agricultural University, Shenyang, China.
Physiologia plantarum
|February 11, 2026
概括
芽病原体Neofusicoccum laricinum使用细胞壁降解酶并抑制宿主防御. 了解其两阶段的感染战略有助于管理对中国的威胁.
科学领域:
- 植物病理学 植物病理学
- 菌类学 菌类学是指菌类学.
- 林业科学 林业科学
背景情况:
- (Larix spp.) 是一种类植物. 对于中国的再造林至关重要,但受到Neofusicoccum laricinum喷病的威胁.
- 了解病原体生物学和毒性对于有效的疾病管理至关重要.
研究的目的:
- 描述N. laricinum的生物特征和毒性机制.
- 研究大的宿主-病原体相互作用.
- 为桃种植园的疾病管理策略提供信息.
主要方法:
- 用形态和分子技术分离和识别了25种N. laricinum菌株.
- 在不同温度和pH值下进行生长评估.
- 致病性测定,酶活性分析 (PMG,PG) 和宿主氧化应激反应评估 (SOD,POD).
- 转录组分析以确定受影响的宿主防御基因 (纤维素合成酶,过氧化酶).
主要成果:
- 在18°C和pH9-11下,N. laricinum的最佳生长,具有显著的菌株特异性毒性.
- 超病毒性菌株产生了高水平的细胞壁降解酶 (CWDEs).
- 病原体破坏了宿主的氧化防御,降低了超氧化脱氧化酶 (SOD) 和过氧化酶 (POD) 的活性.
- 转录组数据显示抑制了纤维素合成酶和过氧化酶基因表达,影响了桃细胞壁合成和抗氧化防御.
结论:
- N. laricinum采用了一种复杂的两相感染策略:CWDEs用于初始破坏和抑制宿主抗氧化系统.
- 病原体积极操纵宿主防御,抑制细胞壁合成和ROS清理.
- 这些发现为干预提供了分子目标,并对气候变化下的虫病原体动态提供了洞察力.
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