Impacto do aumento da concentração atmosférica de dióxido de carbono sobre a ferrugem e o crescimento do cafeeiro
作者： Fernanda Ribeiro Oliveira Tozzi , Raquel Ghini
DOI: 10.1590/S0100-204X2016000800005
关键词:
摘要: The objective of this work was to evaluate the effect increasing atmospheric concentration carbon dioxide on plant growth and leaf rust severity (caused by Hemileia vastatrix ) coffee ( Coffea arabica ). 'Obata IAC 1669‑20' 'Catuai Vermelho IAC 144' cultivars, moderately resistant susceptible disease, respectively, were used. treatments consisted 400 508 μmol mol ‑1 atmospheric CO 2 , in two types open-top chambers (OTC). Plants grown OTCs with addition showed increased area, rate height stem diameter, comparison plants ambient concentration; however, cultivars did not differ for leaf‑wax content. On IAC 144', reduced at concentration, number lesions, lesioned sporulated percentage area under disease progress curve; IAC 1669‑20', vary. incidence leaves per plant, latent period, urediniospore germinations, appressorium formation are changed CO dose both cultivars.
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