Data/hora: 15/06/2024 16:24:18

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 16/01/2014
Data da última atualização: | 09/02/2024
Autoria: | LEITE, M. V.; AUAD, A. M.; RESENDE, T. T. de; FRIAS, M. P.; FONSECA, M. DAS G.; CASTRO, J. C.
Afiliação: | M. V. LEITE, UFJF; ALEXANDER MACHADO AUAD, CNPGL; TIAGO TEIXEIRA DE RESENDE, CNPGL; UFJF; MARCY DAS GRAÇAS FONSECA, UFJF; UFJF.
Título: | Do salicylic acid, nitric oxide and feeding by Mahanarva spectabilis nymphs induce a resistance response in elephant grass?
Ano de publicação: | 2014
Fonte/Imprenta: | Experimental Agriculture, v. 50, n. 4, p. 498-504, 2014.
DOI: | https://doi.org/10.1017/S0014479713000689
Idioma: | Inglês
Conteúdo: | The objective of this study was to determine whether salicylic acid, nitric oxide (NO) and/or feeding by nymphs of the spittlebug Mahanarva spectabilis affect the concentration of total phenolic compounds and the dry matter content of different genotypes of elephant grass (Pennisetum purpureum). Four genotypes of elephant grass with varying levels of resistance to insect attack were treated with 4 mL of salicylic acid (1%) or 2 mL of NO per plant in the presence and the absence of nymphs. We determined the concentration of total phenolic compounds and the percentage dry matter of shoots and roots in the plants. We found that salicylic acid, NO and attack by M. spectabilis did not change significantly the total phenolic compounds concentration in any of the genotypes of elephant grass tested. However, we observed variations in the concentration of phenolic compounds produced between the resistant and susceptible genotypes, both in the shoot, when subjected to salicylic acid or nymphs, and in the roots in the presence of nymphs. Furthermore, the inducers resulted in variation in the dry matter content of the shoots and roots for most of the genotypes tested. Therefore, we conclude that chemical inducers and feeding by M. spectabilis nymphs cannot be used to elicit a resistance response in elephant grass by stimulating the production of phenolic compounds.
Palavras-Chave: | Acido salicilico; Óxido nítrico; Resposta da resistência.
Thesagro: | Capim Elefante.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (20950-1) - UPC - AP - DD -  -  -  - DIS