与急性树衰退相关的细菌:它们来自哪里? 我们知道他们去哪里
Daniel Maddock1, Carrie Brady1, Sandra Denman2
1Centre for Research in Bioscience, College of Health, Science and Society, University of the West of England, Bristol BS16 1QY, UK.
Microorganisms
|November 25, 2023
概括
与急性树衰退 (AOD) 相关的四种细菌可以在土壤,叶子和中生存. 两种物种广泛分布,而另外两种物种主要在中发现,这表明树疾病中的环境作用各不相同.
科学领域:
- 植物病理学 植物病理学
- 微生物生态学 微生物生态学
- 森林科学 森林科学
背景情况:
- 急性树衰退 (AOD) 是一种严重影响树健康的疾病,其特点是树干病变和树冠变薄.
- 有四种细菌物种 (Brenneria goodwinii,Gibbsiella quercinecans,Rahnella victoriana,Lonsdalea britannica) 与AOD病变有关. 这四种细菌物种都与AOD病变有关.
- 这些细菌的环境储存和内菌殖民路径仍然不太清楚.
研究的目的:
- 为了研究四种AOD相关的细菌物种在树枝球土壤,叶子和中的体外生存.
- 从环境和宿主样本中开发和应用这些细菌的回收方法.
- 确定这些细菌与AOD相关的环境分布和潜在的生态作用.
主要方法:
- 在六周内使用土壤,叶子和子矩阵进行体外生存测试.
- 开发一种细菌回收方法.
- 恢复方法应用于健康和症状树的现场样本.
主要成果:
- 在所有测试样本类型中,大多数AOD相关的细菌物种在体外至少存活了六周.
- 在现场样本中广泛检测到Rahnella victoriana和Gibbsiella quercinecans,这表明环境存在广泛.
- Brenneria goodwinii和Lonsdalea britannica仅在中发现,这表明它们作为种子微生物组成员的潜在作用.
结论:
- 拉内拉维多里安娜和吉布西拉Quercinecans具有多样化的环境水库,支持多个内生菌殖民路线.
- 布伦尼利亚好维尼和伦斯达莱亚英国似乎主要是通过种子传播的,在环境中传播有限.
- 进一步的研究应涉及AOD预防,内菌中的致病性转变,以及识别AOD弹性树种子库存.
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