Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, School of Life Sciences, Guangzhou, P. R. China.
University of Chinese Academy of Sciences, School of Life Sciences, Beijing, P. R. China.
J Sci Food Agric. 2019 Dec;99(15):6868-6881. doi: 10.1002/jsfa.9972. Epub 2019 Sep 1.
Papaya, as one of the most important tropical fruits in the world, is easily subjected to chilling injury (CI). Research on the effect of chilling temperature storage on the metabolic changes of papaya peel is limited.
Chilling temperature (4 °C) inhibited fruit ripening and induced CI on papaya fruit. Additionally, low temperature altered the concentrations of 45 primary metabolites and 52 aroma volatile compounds in the papaya peel. Papaya fruit stored at different temperatures could be separated using partial least squares-discriminant analysis (PLS-DA) with primary metabolites and volatile compounds as variables. In total, 18 primary metabolites and 22 volatiles with variable importance in projection (VIP) score higher than one might be considered as potential markers in papaya peel in response to chilling stress. Metabolites related to aroma, such as organic acid, amino acids, hexanal, carbonic acid, pentadecyl propyl ester and methyl geranate, caryophyllene accounted for major part of the metabolism changes of papaya peel and contributed a lot in response to cold stress.
This study added new insights regarding effect of chilling stress on metabolites in papaya peel. Some important metabolites might be indicator for chilling stress and detection of these metabolites will guide us to regulate the storage temperature to avoid chilling and to prolong storage of papaya fruit. © 2019 Society of Chemical Industry.
木瓜是世界上最重要的热带水果之一，很容易受到冷害（CI）的影响。关于冷藏温度贮藏对木瓜皮代谢变化影响的研究有限。
冷藏温度（4°C）抑制了果实成熟并诱导了木瓜果实的冷害。此外，低温改变了 45 种主要代谢物和 52 种香气挥发性化合物在木瓜皮中的浓度。使用偏最小二乘判别分析（PLS-DA），以主要代谢物和挥发性化合物为变量，可将不同温度贮藏的木瓜果实分开。总共有 18 种主要代谢物和 22 种 VIP 得分大于 1 的挥发性化合物可能被认为是木瓜皮中对冷胁迫反应的潜在标志物。与香气有关的代谢物，如有机酸、氨基酸、己醛、碳酸、十五烷基丙基酯和甲基橙花醇、石竹烯，占木瓜皮代谢变化的主要部分，并在应对冷应激方面做出了很大贡献。
本研究为冷胁迫对木瓜皮代谢物的影响提供了新的见解。一些重要的代谢物可能是冷胁迫的指标，检测这些代谢物将有助于我们调节贮藏温度，以避免冷害并延长木瓜果实的贮藏期。 © 2019 化学工业协会。
