Physiological and metabolic responses of grasses to flooding

• Autor(a) principal: Ramos, Terezinha de Jesus Nery
• Data de Publicação: 2011
• Outros Autores: Souza, Cleo Marcelo de Araújo, Carvalho, Claudio José Reis de, Vieira, Irenice Maria Santos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/171

Several studies have shown that the flooding is capable of interfering with the photosynthetic capacity and, consequently, the development of grasses. Seeking more information on the tolerance of plants to flooding, we studied the morphological and metabolic responses in Brachiaria and Paspalum fasciculatum Brizantha, subjected to 21 days of flooding. In Brachiaria, flooding significantly reduced the photosynthetic rate and altered the pattern of allocation and translocation of biochemical components, with a significant increase in total soluble sugars in the leaves and roots, reducing sugars and starch in leaves, roots and amino acids. In flooded plants of P. fasciculatum was no significant difference in photosynthetic rate, starch and amino acids, with accumulation of total soluble sugars in the roots only. The replies given by Brachiaria plants allow us to affirm that this species is more sensitive to flooding, while P. fasciculatum species is more tolerant.To obtain information about the tolerance of plants to flooding, we studied the morphological and metabolic responses in Brachiaria and Paspalum fasciculatum Brizantha, subjected to 21 days of flooding. In Brachiaria, flooding significantly reduced the photosynthetic rate and altered the pattern of allocation and translocation of biochemical components, with a significant increase in total soluble sugars in the leaves and roots, reducing sugars and starch in leaves and amino acids in the roots. In flooded plants of P. fasciculatum was no significant difference in photosynthetic rate, starch and amino acids, with accumulation of total soluble sugars in the roots only. The set of changes presented by plants Brachiaria to suggest that this species is more sensitive to waterlogging while P. fasciculatum species is more tolerant.