1) Plants manufacture glucose in their leaves.
2) They then use some of the glucose for respiration.
3) Thi releasrs energy which enables them to convert the rest of the glucose into various other useful substances which they can use to build new cells and grow!
4) To produce some of these substances they also need to gather a few minerals from the soil.
Glucose along with another sugar called fructose, is turns into sucrose for storing fruits. Fruits deliberately taste nice so that animals will eat them and then spread the seeds all over in their faeces.
Making Cell Walls
Glucose is converted into cellulose for making cell walls, especially in a rapidly growing plant.
Glucose is combined with nitrates (collected from the soil) to make amino acids which are then madae into proteins.
Stored in Seeds
Glucose is turned into Lipids (fats and oils) for storing in seeds Sunflower seeds, for example, contain alot of oil - we get cooking oil and margarine from them. Seeds also store starch.
Stored as Starch
Glucose is turned into starch and stored in roots, stems and leaves ready for use when photosynthesis isn't happening like in the winter. Starch is insoluble which makes it much better for storing, because it doesn't bloat the storage cells by osmosis like glucose would. Potato and carrot plants store a lot of starch underground over the winter so a new plant can grow from it the following spring, We eat the swollen storage organs!