Respiration in plant

Plants have no specialized organs for gaseous exchange unlike animals, but stomata (an opening in a plant`s leaves) and lenticels (a dot or corky spot on stems or branches) for this purpose. Respiration is one of the key ways a plant gains useful energy to fuel its activities.

During respiration, energy is released from sugar (glucose) by a series of chemical reactions. During this process which uses oxygen the sugar is broken down into carbon dioxide and water. Respiration is the direct opposite of photosynthesis due to the fact that it releases energy, using up food and oxygen as well as producing carbon dioxide. Photosynthesis requires light for the production of its food using up for carbon dioxide and producing oxygen. While in respiration, is the release of energy from food. The process of obtaining oxygen and removing carbon dioxide in respiration is known as breathing. 

Plant respiration