关键词: 欧李, 钙, 组织器官, 不同形态钙, 含量, 相关性

Abstract: Variation of different forms calcium contents and their correlation in several tissues and organs (xylem, phloem, flower, fruit, new treetop and fruit petiole) were studied during budding period, florescence period and fruit development. The results showed that, there was close correlation between calcium absorption, accumulation and its existing forms. Calcium pectate was mainly existed in xylem, flower, fruit and fruit petiole. Calcium oxalate was mainly existed in phloem and treetop. During the annual development, the contents of all forms calcium in xylem had a trend of decline, but increased from fruit intumescent period. At the same time, the trend of calcium contents variation in phloem was same, only soluble calcium, calcium pectate, Calcium phosphate and calcium oxalate increased slightly. The variation of all forms calcium contents in flower and fruit decreased first, increased (or decreased) then, and decreased at last. During the fruit development, the soluble calcium,calcium pectate, calcium oxalate and residual calcium increased sharply, and the soluble calcium cotent in fruit petiole increased significantly. Conversion existed among different forms of calcium in different tissues and different development. High degree positive correlation existed between the annual variation of soluble calcium and calcium pectate contents in xylem, phloem, flowers and fruits and the calcium gross.

Key words: Prunus humilis, calcium, tissue and organ, different forms of calcium, content, correlation