储存小麦中高度驱动的真菌毒素变化的机制:一种代谢和转录的方法
1Institutions of Agricultural Product Quality Standard and Testing Research, Xizang Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850032, China. weina@taaas.org.
BMC microbiology
|November 3, 2025
概括
阿尔特纳里亚真菌在储存的小麦中产生有害的真菌毒素,而亚酸 (TeA) 水平在更高的海拔上下降. 高 altitude影响新陈代谢和基因调节,PacC被确定为控制毒素生产的关键因素.
科学领域:
- 农业科学 农业科学
- 菌类学 菌类学是指菌类学.
- 食品安全 食品安全
背景情况:
- 储存的谷物中Alternaria真菌的污染,由于菌毒素的产生,造成了严重的食品安全风险.
- 十亚酸 (TeA) 是由Alternaria物种产生的流行菌毒素,影响小麦质量和人类健康.
研究的目的:
- 为了研究储存的小麦中Alternaria的毒素概况,从Xizang的不同高度.
- 阐明影响Alternaria alternata菌株不同菌毒素产生的分子和代谢机制.
- 为了确定参与Alternaria毒素生物合成的关键调节因素.
主要方法:
- 分析了153个储存的小麦样本,使用超高性能液体染色学-并联质谱法 (UPLC-MS/MS).
- 对被分类的Alternaria菌株 (产生高,中,低毒素) 的代谢和转录组分析的整合.
- 同表达分析以确定候选基因和转录因子;通过淘汰突变体进行功能验证.
主要成果:
- 亚酸 (TeA) 是主要的真菌毒素,其水平与海拔高度有负相关.
- 高度显著影响氨基酸和碳水化合物代谢,这对于Alternaria毒素生物合成至关重要.
- 确定了9个候选结构基因和4个转录因子,其中PacC被确定为毒素生产的中央调节者.
结论:
- 高度是一个关键的环境因素,影响储存小麦中Alternaria菌毒素的产生.
- 该PacC转录因子在调节TeA生物合成中起着关键作用,以应对高度.
- 了解这些机制为减轻储存谷物的真菌毒素污染提供了潜在的目标.
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