植物体中的碳稳定同位素分馏影响因素及在食品真实性鉴别中的研究进展

Influencing factors and research progress of its application on the authentification of food of carbon stable isotope fractionation in plant

中文关键词:  碳稳定同位素  分馏效应  真实性鉴别

英文关键词:carbon stable isotope  fractionation effect  authenticity identification

中文摘要:

      植物体通过光合作用、呼吸作用等与原产地生态环境进行物质交换, 促进自身生长发育和营养物质的合成与积累。碳稳定同位素是植物体的关键组成元素, 也是食品真实性鉴别和溯源的重要指标, 在植物体整个生育期中, 会随着产地生态环境因子的变化而发生分馏, 这种分馏效应的大小决定了碳稳定同位素能否成为准确、稳定、可靠的产地溯源指标。分馏效应的大小除了与生物体自身因素有关外, 还与气象因子和生态环境因子密切相关。经纬度、海拔、日照强度、干旱程度、平均气温等因素均会影响碳稳定同位素的组成。本文综述了近年来国内外植物体内的碳同位素分馏及其影响因素, 以及在植源性食品真实性鉴别应用中的研究进展, 以期证明碳稳定同位素作为食品产地真实性鉴别指标的稳定性和可靠性, 从而为产地溯源提供更加准确的技术手段。

英文摘要:

      Plants exchange materials with the ecological environment of origin through photosynthesis and respiration to promote their own growth and development, synthesis and accumulation of nutrients. Carbon stable isotope is the key component of the plant and it is also an important index of food authenticity identification and traceability. During the whole growth period of the plant, carbon stable isotope will fractionate as the change of the ecological environment factor of origin, and the fractionation effect determines whether carbon stable isotope can be used as accurate, stable and reliable origin traceability index. In addition to the organism's own factors, the magnitude of the fractionation effect is also closely related to meteorological factors and ecological environment factors. Factors such as longitude and latitude, altitude, sunshine intensity, drought degree, average temperature and other factors can affect the composition of stable carbon isotopes. This paper reviewed the influencing factors and research progress of its application on authentification of food of carbon stable isotope fractionation in plant in recent years to reveal the stability and reliability characteristics of carbon stable isotope as an indicator for authenticity identification of origin, so as to provide a more accurate technical means for origin traceability.