在干旱条件下对葡萄的不同器官组织的和氧同位素分离效应
Yuchen Meng1,2, Baohui Jin3, Karyne M Rogers4
1Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing 100084, China.
Journal of agricultural and food chemistry
|September 5, 2023
概括
葡萄酒水同位素分析显示,在不同器官中存在显著的分化效应,受土壤和环境水源的影响. 这为干旱条件下的葡萄酒可追溯性和原产地保护提供了洞察力.
科学领域:
- 同位素水文学 同位素水文学
- 植物生理学 植物生理学
- 葡萄栽培科学 葡萄栽培科学
背景情况:
- 了解水源和葡萄的运动对于葡萄酒的真实性至关重要.
- 植物中的同位素分离可以反映环境条件和生理过程.
研究的目的:
- 为了研究各种葡萄树组织和器官中的水同位素分离.
- 分析环境水源和葡萄酒水之间的关系.
- 评估干旱对葡萄中同位素分割的影响,以保护产地.
主要方法:
- 在葡萄藤器官 (根,茎,叶,果) 中分析 (δ2H) 和氧-18 (δ18O) 同位素比率.
- 葡萄树组织中的同位素值与当地地下水,河水,降水和土壤水的比较.
- 在不同的葡萄树组织和环境条件中建模水同位素分离.
主要成果:
- 地下水的 δ2H 值比河流和降水更为负;土壤水的 δ2H 和 δ18O 值比其他环境来源更高.
- 表面土壤水的阳性同位素值高于深层的阳性同位素值,表明了阳性分离.
- 葡萄树组织的 δ2H 和 δ18O 与降水相比呈现负变化,其中茎,果子和叶子的分化较强.
- 氧-18 (18O) 在葡萄藤器官中表现出比 (2H) 更高的分离效应.
结论:
- 葡萄酒水同位素组成受到土壤水和环境来源的重大影响.
- 在干旱条件下,葡萄中的18O分化更为明显.
- 这些发现为提高葡萄酒可追溯性和保护葡萄酒产区原产地提供了理论基础.
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