关键词: 柑橘, 子房(幼果), 春梢叶, 钙, 果胶

Abstract: The dynamics of calcium pectate, calcium oxalate, water soluble pectin and proto-pectin in the ovary (fruitlet) and spring-flush leaves of parthenocarpic Kamei Satsuma mandarin (Citrus unshiu Marc.) and self-pollinated Egan 1 tangerine (Citrus reticulata Blanco) around flowering were investigated.The results were as follows.Dynamics of Ca pectate concentrations in the ovary (fruitlet) and spring-flush leaves of two cultivars were similar, and they changed slightly, while dynamics of Ca oxalate concentrations in the ovary (fruitlet) were inverse between both cultivars.The concentration of Ca oxalate decreased gradually in the ovary (fruitlet) of Kamei, whereas that of Egan 1 increased significantly after flowering.The concentration of Ca oxalate in spring-flush leaves of both presented similarly increasing trends, and the concentrations of Ca pectate in the ovary (fruitlet) and spring-flush leaves and Ca oxalate in the ovary (fruitlet) of Egan 1 were at relatively high level.It was found that the dynamics of water soluble pectin in the ovary (fruitlet) and spring-flush leaves were obvious different between two cultivars.But the dynamics of proto-pectin of two cultivars were similar.Notable increases were observed for them after flowering.The concentrations of water soluble pectin and proto-pectin of Egan 1 were relatively high.Relationships between changes in concentrations of two forms of Ca and two forms of pectin in the ovary (fruitlet) and spring-flush leaves and development of leaves and fruits were discussed.

Key words: citrus, ovary(fruitlet), spring-flush leaf, calcium, pectin