Symbolic analysis: The fruit is white, which carries over the theme of divinity first encountered in the white clothing of the angelic companion. To partake of the fruit requires action on Lehi's part. The existence of the fruit is not sufficient to provide happiness or divine joy. It is required that one partake of the fruit. The partaking of the fruit follows another widespread symbolic theme, where ingestion of food is the equivalent of internalizing that which the fruit symbolizes. In other words, the eating is symbolic of accepting that for which the fruit stands.
The partaking of this white fruit is clearly parallel to the partaking of the fruit in the Garden (both the allowed and the forbidden.) The function is the same in both cases, where the ingestion of the fruit has a greater purpose than simple physical nourishment.
The fruit is an apt symbol for the gospel, in that it is inert, and without life in and of itself, yet contains the seed which leads to new life. Ingesting this fruit ingests this symbolic new life.