Abstract：
Avocado ripening entails intricate physicochemical transformations resulting in desirable characteristics for consumption; however, its impact on specific metabolites and its cultivar dependence remains largely unexplored. This study employed LC-MS to quantitatively monitor 30 avocado pulp metabolites, including phenolic compounds, amino acids, nucleosides, vitamins, phytohormones, and related compounds, from unripe to overripe stages, in three commercial varieties (Hass, Fuerte, and Bacon). Multivariate statistical analysis revealed significant metabolic variations between cultivars, leading to the identification of potential varietal markers. Most monitored metabolites exhibited dynamic quantitative changes. Although phenolic compounds generally increased during ripening, exceptions such as epicatechin and chlorogenic acid were noted. Amino acids and derivatives displayed a highly cultivar-dependent evolution, with Fuerte demonstrating the highest concentrations and most pronounced fluctuations. In contrast to penstemide, uridine and abscisic acid levels consistently increased during ripening. Several compounds characteristic of the Bacon variety were delineated but require further research for identification and role elucidation.
摘要：
鳄梨成熟需要复杂的物理化学转化，从而产生理想的消费特性；然而，它对特定代谢产物的影响及其品种依赖性仍未被探索。本研究采用LC-MS定量监测30种鳄梨果肉代谢产物，包括酚类化合物，氨基酸,核苷，维生素,植物激素,和相关化合物，从不成熟到过成熟阶段，在三个商业品种(哈斯，Fuerte,和培根）。多变量统计分析显示品种之间的显着代谢差异，导致潜在品种标记的鉴定。大多数监测的代谢物表现出动态的定量变化。虽然酚类化合物在成熟过程中通常会增加，注意到表儿茶素和绿原酸等例外。氨基酸和衍生物表现出高度依赖品种的进化，Fuerte表现出最高的浓度和最明显的波动。与penstemide相比，尿苷和脱落酸水平在成熟过程中不断增加。描述了培根品种的几种特征化合物，但需要进一步研究以进行鉴定和作用阐明。
