使用便携式拉曼光谱仪在现场早期检测草炭
Soogeun Kim1, Sang-Hyun Hong1, Joon Heon Kim1
1Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
概括
使用便携式拉曼系统,可以早期检测草炭. 这种方法可以在暴露后3天内识别真菌感染,甚至在症状出现之前.
科学领域:
- 植物病理学 植物病理学
- 频谱学是一种光谱学.
- 化学测量 化学测量 化学测量
背景情况:
- 由Collettotrichum gloeosporioides引起的草炭菌对作物产量构成重大威胁.
- 早期检测对于有效的疾病管理和防止广泛爆发至关重要.
- 目前的检测方法通常依赖于视觉症状,这些症状出现在感染周期的晚期.
研究的目的:
- 开发一种快速的现场检测方法来检测草炭菌.
- 使用便携式拉曼系统与多变量统计分析相结合,用于早期疾病识别.
- 在草茎中建立分子标记物来检测Colletotrichum gloeosporioides感染.
主要方法:
- 开发一个带有光纤探测器的便携式拉曼光谱系统.
- 应用多变量统计分析算法,包括主要组件分析 (PCA) 和线性差异分析 (LDA).
- 分析拉曼光谱以确定与真菌入侵和植物反应相关的分子标记.
主要成果:
- 在暴露于Collettotrichum gloeosporioides后3天内检测出甲状腺炎,在明显的症状出现之前.
- 分子标记的识别:来自C. gloeosporioides的胺III和脂肪酸增加,以及草植物中的化合物和类化合物减少.
- 在PCA中,对照组,真菌感染组和病原体组之间有明显的区别.
- 根据拉曼光谱数据,LDA在识别C. gloeosporioides感染时取得了超过40%的准确性.
结论:
- 便携式拉曼系统提供了一个有前途的工具,用于早期,现场检测草炭菌.
- 来自拉曼光谱的分子标记物,包括真菌代谢物和宿主植物反应,是感染的有效指标.
- 这种非破坏性技术能够及时干预,从而有可能减少作物损失.
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