Manganese phosphite in Coffee defence against Hemileia vastatrix, the coffee rust fungus: biochemical and molecular analyses.

Phosphites (Phi) are inorganic salts of phosphorous acid that have been used as resistance elicitors to activate mechanisms underlying plant defence. This study assessed the effectiveness of manganese phosphite (MnPhi) for the management of rust (Hemileia vastatrix) on coffee seedlings. The effect of this compound on the induction of resistance was also measured by the expression of defence-related genes such as POX (peroxidase), CAT (catalase), GLU (b-1.3-glucanase) and PAL (phenylalanine ammonia-lyase) and by the activity of defence enzymes such as ascorbate peroxidase (APX), superoxide dismutase (SOD) and polyphenol oxidase (PPO). Foliar sprayings of MnPhi on coffee seedlings provided 63% control of rust severity. This compound induced defence responses in seedlings with increased transcription of genes POX, CAT, GLU and PAL in non-inoculated plants and increased activity of APX, SOD and PPO enzymes in plants inoculated with H. vastatrix and in non-inoculated plants. It is suggested that MnPhi can induce resistance in coffee seedlings.

Bibliographic Details

Main Authors:	MONTEIRO, A. C. A., RESENDE, M. L. V. de, VALENTE, T. C. T., RIBEIRO JUNIOR, P. M., PEREIRA, V. F., COSTA, J. R. da, SILVA, J. A. G. da
Other Authors:	ANA CRISTINA ANDRADE MONTEIRO, Universidade Federal de Lavras; MÁRIO LÚCIO VILELA DE RESENDE, Universidade Federal de Lavras; THAÍS CAINÃ TEIXEIRA VALENTE, Universidade Federal de Lavras; PEDRO MARTINS RIBEIRO JUNIOR, CPATSA; VANESSA FORESTI PEREIRA, Universidade Federal de Lavras; JOSINEIDE RODRIGUES DA COSTA, Universidade Federal de Lavras; JOYCE ALVES GOULART DA SILVA, Universidade Federal de Lavras.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2017-03-21
Subjects:	Ferrugem do café, Enzymatic activity, Rust., Resistance elicitor, Café, Fungo, Coffea Arábica., Gene expression.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1067414
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