Inductors of Resistance and Their Role in Photosynthesis and Antioxidant System Activity of Coffee Seedlings

Luiz Henrique Monteiro Fernandes¹, Helbert Rezende de Oliveira Silveira^2*, Kamila Rezende Dázio de Souza³, Mário Lúcio Vilela de Resende¹, José Donizeti Alves³

¹Department of Plant Pathology, Federal University of Lavras—UFLA, Lavras, Brazil.
²Agricultural Reasearch Company of Minas Gerais—EPAMIG, Campus of Federal University of Lavras—UFLA, Lavras, Brazil.
³Department of Biology, Federal University of Lavras—UFLA, Lavras, Brazil.

DOI: 10.4236/ajps.2014.525387                

Abstract

We investigated the effects of formulations based on phosphite products on gas exchange and activity of antioxidant enzymes in coffee plants. Seedlings of the Mundo Novo cultivar were submitted to various treatments composed of different formulations of with potassium phosphite (ADB 120), manganese phosphite (Reforce Mn), and fungicide (PrioriXtra^®). For coffee seedlings, the combination of potassium phosphite and citrus by-products, isolated or in a combination with other products elicited the antioxidant system. Besides the high activity of antioxidant enzymes, the photosynthetic rates were higher than other treatments. The better performance of coffee seedlings treated with those formulations occurred even in absence of pathogens.

Keywords

Coffea arabica, Superoxide Dismutase, Ascorbate Peroxidase, Catalase

Conflicts of Interest

The authors declare no conflicts of interest.

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