Plant growth and leaf-spot severity on eucalypt at different CO2 concentrations in the air.

• Autor(a) principal: SILVA, C. E. da
• Data de Publicação: 2014
• Outros Autores: GHINI, R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1000110
• topic: Cylindrocladium candelabrum; Beneficial effects; Efeito benéfico; Incidência de doença; Climatic change; Plant growth performance; Leaf spotting; Eucalyptus urophylla; Crescimento; Mancha foliar; Dióxido de carbono; Clima; Mudança Climática; Disease incidence; Carbon dioxide

The objective of this work was to evaluate the effects of increased air‑CO2 concentration on plant growth and on leaf‑spot caused by Cylindrocladium candelabrum in Eucalyptus urophylla. Seedlings were cultivated for 30 days at 451, 645, 904, and 1,147 μmol mol‑1 CO2; then, they were inoculated with the pathogen and kept under the same conditions for seven days. Increased CO2 concentration increased plant height and shoot dry matter mass, and decreased disease incidence and severity. Stem diameter was not affected by the treatments. Increased concentrations of atmospheric CO2 favorably affect eucalypt growth and reduce leaf‑spot severity.