Abstract:

In order to find out the physiological-biochemical characteristics of functional leaf as the main organ for energy during male flowers’ development stages of oil palm and the relationship with the male flowers, the author studied on dynamic changes of soluble sugar, sucrose, soluble protein, parameters of antioxidant system and chlorophyll fluorescence of functional leaf during male flowers’ development stages of four oil palm varieties, and correlated with male flowers characters. The results showed that with the development of male flowers, functional leaf metabolism showed a certain coordinate synchronization. At unopened bud and split stage, a large number of nutrients produced of functional leaves were transferred to the growth of male flowers, soluble sugar, sucrose and soluble protein showed low levels. The ratio of sucrose to soluble sugar was highest at split stage, metabolism was strongest. Superoxide anion radical by-products as a strong metabolism, removed by three protective enzymes ‘POD, SOD, CAT’, to protect the normal physiological function of functional leaves. With the male flowers morphogenesis, accumulating and wilting, Fo, Fv, Fm of Functional leaves highest, Fo/Fm lowest, minimal damage to photosynthetic apparatus, chlorophyll content highest, photosynthetic electron transport activity at the split stage while the Fv/Fm remained stable state. Unopened bud and split stage were closely related to the male flowers and function leaves metabolism, was the key period of cultivation and management.