Micronutrients affecting leaf biochemical responses during pineapple development

• Autor(a) principal: Amorim,Aiala Vieira
• Data de Publicação: 2013
• Outros Autores: Lacerda,Claudivan Feitosa de, Marques,Elton Camelo, Ferreira,Francisco Jardelson, Silva Júnior,Ricardo José da Costa, Andrade Filho,Francisco Luciano, Gomes-Filho,Enéas
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Theoretical and Experimental Plant Physiology
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000100009
• topic: Ananas comosus; carbohydrates; metabolism; mineral nutrition; titratable acidity

An adequate mineral nutrition is essential for the development and productivity of pineapple. However, little is known about the nutritional and metabolic changes that occur in this crop in response to micronutrient deficiency or excess, particularly on tropical conditions. Thus, the objective of this study was to evaluate the application effects of micronutrients in soil and in leaf on biochemical responses of leaves during the development cycle of the pineapple crop. Samples were collected at 3, 6, 9, 12, and 17 months after transplantation. Leaf soluble carbohydrates and N-aminosoluble compounds were determined, as well as variations in the titratable acidity and pH. The soil and leaf micronutrient application increased the concentrations of carbohydrates and N-aminosoluble and reduced the leaf pH, and the changes were more significant in the last sampling (17 months after transplantation). Reductions in concentrations of carbohydrates and increase in the titratable acidity of the pineapple leaves collected at the end of the night were also observed, a fact that reflects the metabolism of Crassulacean acid metabolism species. The strategy of micronutrient application contributes positively to alter the metabolism of plants of pineapple cv. Victoria, especially during flowering and fruit development.