Atmospheric CO2 enrichment markedly increases photosynthesis and growth in a woody tropical bamboo from the Brazilian Atlantic Forest

Autor(es)

Grombone-Guaratini, M. T. ^[1] ; Gaspar, M. ^[2] ; Oliveira, V. F. ^[2] ; Torres, M. A. M. G. ^[1] ; do Nascimento, A. ^[1] ; Aidar, M. P. M. ^[2]

Afiliação do(s) autor(es)

^[1] Inst Bot, Nucleo Pesquisa Ecol, Sao Paulo - Brazil

^[2] Inst Bot, Nucleo Pesquisa Fisiol & Bioquim, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NEW ZEALAND JOURNAL OF BOTANY; v. 51, n. 4, p. 275-285, DEC 1 2013.
• Citações Web of Science: 7

Resumo

Bamboo is one of the most easily available resources found in forests. Due to their long periods of vegetative growth and rapid biomass gains, bamboo species could show a significant potential for responding to elevated atmospheric CO2 concentrations. The purpose of this study was to investigate the effects of an increased CO2 concentration on selected physiological and biochemical parameters of the bamboo Aulonemia aristulata. After 7 weeks, plants grown under an elevated CO2 concentration showed an increase of 77% in photosynthesis, 56% in tillering, 104% in leaf area, 92% in height and 91% in total biomass. These plants also had a lower stomatal conductance (-40%) and higher water use efficiency (62%). Physiological responses such as adjustment in the photosynthetic rates, carbon gain and water relations shown by A. aristulata in response to increased CO2 concentration could promote a higher dominance of this bamboo species in a global change scenario. This dominance could affect the species composition, structure and function of tropical forests. (AU)

• Processo FAPESP: 05/51747-2 - Influência de Paradiolyra micrantha na regeneração de um fragmento urbano de Mata Atlântica
• Beneficiário: Maria Tereza Grombone Guaratini
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/17792-1 - Efeito da atmosfera enriquecida de CO2 no crescimento e na produção de aleloquímicos por Aulonemia aristulata (Döll) MacClure
• Beneficiário: Marco Aurélio Mata Gonçalves Torres
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica