The effect of addition of chokeberry, flowering quince fruits and rhubarb juice to strawberry jams on their polyphenol content, antioxidant activity and colour. Abstract The aim of the study was to establish whether the addition of berries (Xowering quince, chokeberry) and rhubarb juice during jam. There are plenty of fruits, vegetables, tubers, and other plants that we Like the rhubarb, the part of the asparagus plant that we love—the. Quince is filled with vitamin C, it activates cerebration and accelerates thinking. Cowberries are a good antioxidant. Dried rhubarb will give you energy and. So what do apples, pears, loquats, medlars and quince all have in common? They are all fruits that are botanically classified as pomes (also. Chris Bowers and Sons, suppliers of specialist fruit trees, fruit plants, Fruit Bushes and Fruit Nursery. 30 Year reputation as the UK's foremost supplier of fruiting.