Fruits grown in hot climates are usually less sweet than those grown in cooler temperatures. the high temperatures increase the rate of respiration in the plants, thus reducing the sugar content in some fruits. why does increased respiration in the leaves and stems reduce the sugar content in the fruits of a plant? a) chloroplasts move from the fruits to the leaves and stems to provide energy for respiration. b) the flow of nutrients shifts from the phloem to the xylem, moving nutrients away from the fruits. c) sugars are moved from the fruits to the roots for storage. d) sugars produced in the leaves are used as an energy source instead of being stored in fruits.