叶子的结构特征调解了在未受感染的条件下,在中预先存在的物理天生的对虫的抵抗力
Ethan Triplett1, Chad Hayes2, Yves Emendack2
1Department of Plant and Soil Science, Texas Tech University, Lubbock, TX, 79409, USA.
Planta
|July 19, 2023
概括
抗虫 (SA) 的 Sorghum 品种具有更多的三胞体,胃体和叶绿体,具有较少的 mesophyll 空间. 这些物理特征提供了一种新的选方法,可以在没有感染的情况下选SA耐药性.
科学领域:
- 植物病理学 植物病理学
- 昆虫学 昆虫学是一门学科.
- 农业学是一种农业学.
背景情况:
- 石榴 (SA) 显著降低了石榴的产量,了解耐药机制至关重要.
- 目前的SA耐药选方法是主观的,需要虫感染.
- 识别与先天性SA耐药性相关的结构特征可以导致客观的选工具.
研究的目的:
- 为了识别与肉中对肉虫的物理天生的耐药性相关的叶子结构特征.
- 建立开发SA耐药性的非感染查方法的基础.
主要方法:
- 进行了受控环境和实地实验,使用没有SA感染的耐药和易受感染的 Sorghum 品种.
- 用光,传输电子和扫描电子显微镜分析了叶子组织,以评估表皮和中粒细胞的特征.
- 量化了微解剖学特征,包括三体和口腔密度以及叶绿体密度.
主要成果:
- 与易受感染的品种相比,耐药的 Sorghum 品种表现出明显更高的三合体密度 (39%),口腔密度 (31%) 和叶绿体密度 (42%).
- 在耐药品种中,半细胞间宽度显著较小 (-52%).
- 叶绿体,线粒体和表皮细胞的超结构特征并不是SA抗性的有效指标.
结论:
- 较大的三胞体密度,口腔密度,叶绿体密度和较小的 mesophyll 细胞间宽度是先天虫耐药性的关键指标.
- 这些发现支持开发客观的,高通量选方法来检测SA抗性.
- 建议在虫感染条件下进行进一步的验证.
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