1-Methylcyclopropene on Fruit Quality of Se-Enriched Grape (Vitis vinifera L.) during Shelf Life Period

Shuaimeng Zhu,Yinli Liang,Lan Mu,Hongfei Yin,Xiaojuan An

doi:10.3390/agronomy10091411

Abstract

Selenium (Se) deficiency in humans could be improved by biofortification of food with selenium, 1-Methylcyclopropene (1-MCP) treatment is beneficial for the non-sulfur storage of fresh fruit. This study investigated fruit quality of table grape (Hutai No.8) with foliar Se fertilizer at maturity, and fruit quality changes of table grape during shelf life stages that caused by postharvest 1-MCP treatment in 2016 and 2017. The results showed that foliar Se fertilizer application significantly increased Se content in grape berries at maturity, and the raised rate were 43.09% and 33.24% compared to that of control in 2016 and 2017 respectively, meanwhile it increased the nutritional components in grape berries, including soluble proteins, soluble sugars, Vitamin C, total soluble solids, proanthocyanidin content and so on, and decreased the titratable acidity content. During shelf life stages, 1-MCP application decreased the decay number of grapes, and SE + 1-MCP treatment had the most excellent fruit quality among all treatments in two consecutive vintages. In conclusion, Se fertilizer application could increase Se content in grape berries, also improved the fruit nutritional and health care values at maturity. 1-MCP application could delay the process of ripening and senescence for Se-enriched grape and maintaining the postharvest quality of table grape during shelf life stages, it allows us to market the fruit at a more advanced ripening stage without quality loss.

Highlights

Grape (Vitis vinifera L.) is the head among the four largest fruits in the world, with abundant nutrition and health care values that are essential to human health [1,2]
Soluble sugars and soluble proteins in grape berries under Se fertilizer treated was higher compared to that of CK, it may be due to the high photosynthetic rate of Se fertilizer application, it was confirmed in our previous study [43,44], which was focused on changes of sugars content in response to foliar Se fertilizer, the results showed that the high acid invertase of grape berries and the high photosynthetic rate of leaves explained the increasing of soluble sugars in grape berries with foliar spray Se fertilizer
All of our studies indicated that foliar spray Se fertilizer had no significant effect on RES content in grape berries, and OPC content under SE treatments was increased obviously compared with CK

Summary

Introduction

Grape (Vitis vinifera L.) is the head among the four largest fruits (apples, grapes, oranges and bananas) in the world, with abundant nutrition (such as soluble sugars, proteins, nutriment elements, and so on) and health care values (such as vitamins, resveratrol and proanthocyanidin) that are essential to human health [1,2]. With deeper understanding of Se on human nutrition, more and more. Selenium (Se) is an essential microelement in human nutrition [3]. Agronomic biofortification with Se-enriched fertilizers is an effective means to increase Se intake in dietary by humans [4,5]. Spraying Se fertilizer is an effective way of developing Se-enriched fruit, and a new practice for high quality production in fruit cultivation. Using organic Se sources in plants can regulate Se nutrition from the source and prevent related Se deficiency diseases; it is a safe, inexpensive and feasible

Methods

Results

Conclusion