Hi. I was checking plums and mangoes with Wikipedia, and see they share only the same class ("Magnoliopsida"). I somehow thought they would be closer to each other. I would like to know, if it is possible to create cross-breeds through pollination or other methods of them. I also would like to know, if it is possible to store the pollen of blossoms, and how best to store it, before using it for pollination.
No chance of hybridising plums and mangoes, sorry! Pollen of some plants can be stored dry and cold, but it doesn't work with all plants. Unfortunately, no easy way of finding out for any particular named plant.