Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/12604
Title: Aspectos anatômicos e fisiológicos de mudas de cafeeiro (Coffea arabica L.) com cercosporiose (Cercospora coffeicola Berk. & Cook.) adubadas com ácido silícico
Other Titles: Anatomical and physiological aspects of coffee seedlings (Coffea arabica L.) with brown eye spot (Cercospora coffeicola Berk. & Cook.) cultivated with silicic acid
Keywords: Fotossíntese potencial
Clorofila
Microscopia eletrônica de varredura
Potential photosynthesis
Chlorophyll
Scanning electron microscopy
Coffee - Fertilizer
Café - Adubo
Ácido silícico
Silicid acid
Issue Date: Jul-2009
Publisher: Universidade Federal de Lavras
Citation: BOTELHO, D. M. dos S. et al. Aspectos anatômicos e fisiológicos de mudas de cafeeiro (Coffea arabica L.) com cercosporiose (Cercospora coffeicola Berk. & Cook.) adubadas com ácido silícico. Coffee Science, Lavras, v. 4, n. 2, p. 93-99, jul./dez. 2009.
Abstract: Our objective was to verify how silicic acid can influence physiological and anatomical characteristics of coffee (Coffea arabica L.) seedlings inoculated with Cercospora coffeicola Berk. & Cook. The treatments were six silicic acid doses amended to the soil (0, 0.5, 1, 2, 4 and 6 g kg 1 of soil) using a complete randomized block experimental design with four replicates. The experimental unit was composed of 12 coffee seedlings from the cultivar Catuaí Vermelho IAC 99. We evaluated the leaves by their chlorophyll a, b, carotenoids and lignin content as well as by the presence of epicuticular wax. The photosynthetic potential was evaluated in seedling with and without symptoms of brown eye spot in the highest silicic acid dose (6.0 g kg -1) and control. Transversal stem cuts were performed for measurements of the epidermal, cambium, xylem, phloem and spongy parenchyma thickness. The content of leaf pigments and lignin as well asthe stem s anatomical characteristics were not influenced by the increasing silicic acid amendment. The presence of epicuticular wax was observed in leaves of plants grown in the 2g and 6g silicic acid. The highest silicic acid dose showed the lowest photosynthetic potential capacity in seedlings without symptoms of brown eye spot.
URI: http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/173
http://repositorio.ufla.br/jspui/handle/1/12604
Appears in Collections:Coffee Science
DCS - Artigos publicados em periódicos
DFP - Artigos publicados em periódicos

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