Resumo

MORENO-ECHEVERRY, DARWIN; QUIROGA, IVONNE A.; BALAGUERA-LOPEZ, HELBER ENRIQUE  e  MAGNITSKIY, STANISLAV. Boron stress affects photosynthesis and metabolism of plant pigments. A review. rev.colomb.cienc.hortic. [online]. 2016, vol.10, n.1, pp.137-148. ISSN 2011-2173.  https://doi.org/10.17584/rcch.2016v10i1.4189.

Stress due to the deficiency and toxicity of boron is common in crop plants. Currently, the role of boron in photosynthesis and its effects on pigment metabolism are unknown. Photosynthesis can present stomatal limitations due to a decrease in gas exchange and non-stomatal limitations, characterized by decreases in the activity of enzymes of the Calvin cycle and alterations in chlorophyll fluorescence due to the decoupling generated between the photo phase and synthesis phase of photosynthesis, promoting contents that increase reactive oxygen species that negatively affect some molecules, cellular structures, and photosynthetic efficiency. Likewise, an alteration of the pigment metabolism occurs, changing the composition of a, b, and total chlorophylls, as well as the concentration of other pigments, such as carotenoids, involved in the tolerance of plants to various stress conditions, varying their expression according to the species and phenological stage.

Palavras-chave : chlorophyll fluorescence; Calvin cycle; mineral nutrition; carotenoids; reactive oxygen species.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )