Portal de Periódicos da CAPES

Fotoinibição da Fotossíntese

2009; UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; Volume: 7; Issue: 4 Linguagem: Inglês

1679-2343

Saulo Alberto do Carmo Araújo, Bruno Borges Deminicis,

Environmental Sustainability and Education

The life in the earth depends on the derived energy of the sun. The photosynthesis is the only process of biological importance that can pick this energy. The term “photosynthesis” means “synthesis that uses light” literally. The photosynthetic organisms use solar energy to synthesize organic combinations that cannot be formed without the contribution of energy. Energy stored in these molecules can be used later as source of energy to cellular processes in the plant and it can serve as resource of energy for all the life forms. It is, therefore surprising that the light can also be harmful for the photosynthesis. Evidences that the light excess can affect the vegetable growth exist and lead to the reduction of the productivity. Now that stress condition is known as photo inhibition and defined as a complex group of molecular processes that promote the photosynthesis inhibition through the light excess. The objective of this review is to emphasize the importance of the photo inhibition, their implications in the photosynthetic processes and when and where the photo damage happens, as well as the importance of the climatic factors in this process.