Zhi-wei Zhang; Meng Ma; Xian-qian Liu; Rui-yan Ma; Jing Liu
July 2014
Fluoride;Jul-Sep2014, Vol. 47 Issue 3, p208
Academic Journal
The Ziziphus jujuba Miller (Rhamnaceae) fruit has significant health and nutritional benefits. A new fruit disease called jujube black tip disease caused by fluoride pollution has seriously damaged the jujube industry of northern China. A series of experiments were conducted using light microscopy, transmission electron microscopy, and scanning electron microscopy to study the injury process in Z. jujuba Miller "Huping" fruits treated by different concentrations of hydrofluoric acid (HF). The results show that Huping jujube fruits could tolerate HF concentrations less than 200 mg/L but suffered varying degrees of damage when exposed to HF concentrations of more than 200 mg/L. Fruit pericarp and pulp sustained greater damage as HF concentration increased. Analysis of cell ultrasturcture from treated plants shows that mitochondrion tolerance to fluorine stress could be used as an index to determine the jujube fruit tolerance to fluorine stress. HF exposure caused gradual injury to fruits. Scanning electron micrographs show that the epicuticular wax was injured by spraying 150 mg/L HF.


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