Department of Agronomy, Chair for Fruit Growing, Viticulture and Vegetable Growing, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
J Sci Food Agric. 2019 Jan 30;99(2):854-860. doi: 10.1002/jsfa.9255. Epub 2018 Aug 29.
Tannins are frequently a main focus in the investigation of de-astringency treatments of persimmon, and the effect of a controlled atmosphere on other phytochemicals is often overlooked. In the present study, changes in the content of total soluble and insoluble phenolics, soluble tannins, saponins, and carotenoids, as well as changes in primary metabolites, were monitored.
Generally, treatment with ethylene induced a decrease in total phenolic content, whereas, when treated with CO , the content of total phenolics remained unchanged compared to the level of total phenolics before treatment. Treatment with apple-sourced ethylene did not significantly affect the level of total phenolics. Additionally, for both varieties, 'Kaki Tipo' and 'Rojo Brillante', the share of insoluble phenolics strongly increased when treated with CO , whereas, when treated with ethylene, the same change applied for the ratio of soluble phenolics. The content of carotenoids varied markedly among treatments and varieties, whereas the content of total saponins remained unchanged, regardless of the treatment and variety.
The results obtained in the present study show that the content of metabolites in persimmon was affected markedly and variedly using post-harvest technology. Apart from the treatment used, changes in the content of metabolites are also affected markedly by the persimmon variety. © 2018 Society of Chemical Industry.
单宁通常是柿子脱涩处理研究的重点，而控制气氛对其他植物化学物质的影响往往被忽视。在本研究中，监测了总可溶和不可溶酚类物质、可溶单宁、皂素和类胡萝卜素含量的变化以及主要代谢物的变化。
通常，乙烯处理会导致总酚含量降低，而 CO 处理与处理前的总酚含量相比保持不变。用苹果源乙烯处理不会显著影响总酚含量。此外，对于两个品种“Kaki Tipo”和“Rojo Brillante”，用 CO 处理时不可溶酚的比例显著增加，而用乙烯处理时，可溶酚的比例也发生了同样的变化。处理和品种之间类胡萝卜素的含量变化明显，而总皂素的含量则保持不变，无论处理和品种如何。
本研究结果表明，采用采后技术，柿子中代谢物的含量受到显著影响，且变化多样。除了处理方式外，代谢物含量的变化也受到柿子品种的显著影响。© 2018 英国化学学会。
