Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
University of Chinese Academy of Sciences, Beijing 100039, China.
Biomolecules. 2018 Jul 12;8(3):52. doi: 10.3390/biom8030052.
Banana is a climacteric fruit with desirable palatability and high nutritional value. It ripens rapidly accompanied with metabolite changes during postharvest storage. In this work, morin was applied to treat banana to delay senescence. Nuclear magnetic resonance (NMR) spectroscopy was used to monitor the changes of metabolite composition and levels in banana. The results showed that morin significantly delayed the changes of color and firmness. 1D and 2D NMR spectra reflected that the levels and composition of metabolites were changed with the senescence initiation. The principal component analysis revealed that the first principal components responsible for banana senescence were carbohydrates, amino acids, lipids and phenolics. Morin treatment delayed the transformation of starch to glucose, fructose and sucrose, accelerated the accumulations of alanine and γ-Amino-butyrate (GABA), postponed the generations of valine and l-aspartic acid, suppressed the degradation of saponin a. It indicated that morin was effective in delaying banana senescence.
香蕉是一种具有可口风味和高营养价值的呼吸跃变型果实。它在采后贮藏过程中伴随着代谢物的变化迅速成熟。在这项工作中，桑色素被应用于处理香蕉以延缓衰老。核磁共振（NMR）光谱被用于监测香蕉中代谢物组成和水平的变化。结果表明，桑色素显著延缓了颜色和硬度的变化。1D 和 2D NMR 图谱反映了随着衰老的开始，代谢物的水平和组成发生了变化。主成分分析表明，负责香蕉衰老的第一主成分是碳水化合物、氨基酸、脂类和酚类。桑色素处理延缓了淀粉向葡萄糖、果糖和蔗糖的转化，加速了丙氨酸和γ-氨基丁酸（GABA）的积累，推迟了缬氨酸和 L-天冬氨酸的生成，抑制了皂角苷 a 的降解。这表明桑色素能有效延缓香蕉衰老。
