Is guava phenolic metabolism influenced by elevated atmospheric CO2?

Autor(es)

de Rezende, Fernanda Mendes ^[1] ; de Souza, Amanda Pereira ^[1] ; Buckeridge, Marcos Silveira ^[1] ; Furlan, Claudia Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biosci, Dept Bot, BR-05508090 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 196, p. 483-488, JAN 2015.
• Citações Web of Science: 5

Resumo

Seedlings of Psidium guajava cv. Pedro Sato were distributed into four open-top chambers: two with ambient CO2 (similar to 390 ppm) and two with elevated CO2 (similar to 780 ppm). Monthly, five individuals of each chamber were collected, separated into root, stem and leaves and immediately frozen in liquid nitrogen. Chemical parameters were analyzed to investigate how guava invests the surplus carbon. For all classes of phenolic compounds analyzed only tannins showed significant increase in plants at elevated CO2 after 90 days. There was no significant difference in dry biomass, but the leaves showed high accumulation of starch under elevated CO2. Results suggest that elevated CO2 seems to be favorable to seedlings of P. guajava, due to accumulation of starch and tannins, the latter being an important anti-herbivore substance. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/06942-5 - Atmosfera enriquecida com CO2 e seus efeitos na alocação de metabólitos secundários em Psidium guajava L. cv. Pedro Sato
• Beneficiário: Leila Sampaio da Silva
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico