The Prunus maritima Marshall,native to the United States,is one of the most salt-tolerant fruit trees.In order to study the fruit characteristics of beach plum,mature fruits of 8-year-old beach plum germ-plasm resource FJB were used as materials,and the phenotypic indicators and the nutritional components of the fruit were analyzed and evaluated.The results showed that the mature fruits were diminutive,with a single fruit weight of approximately 2 grams.The fruit surface color ranged from reddish-purple to light blue.The average soluble solid content was about 14.84％,with total sugar of 7.86％,titratable acid of 0.79％,sugar to acid ratio of 10.03.It was rich in vitamin E and vitamin C,at 7.36 mg/kg and 19.38 mg/100 g,respective-ly.Total polyphenol content reached 6.97 mg/g,fruit anthocyanins content was 35.02 mg/100 g,and peel anthocyanins content reached 260.67 mg/100 g.Among the metal elements of potassium,sodium,iron,mag-nesium,calcium,and zinc,the content of potassium was the highest,followed by calcium,sodium,and mag-nesium.After acid hydrolysis,the total amino acid was 0.379 g/100 g,and the proportion of aspartic acid and glutamic acid was the highest,reaching 54.46％.
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