Data/hora: 19/06/2024 17:49:39

Biblioteca(s): | Embrapa Tabuleiros Costeiros.
Data corrente: | 16/07/2015
Data da última atualização: | 29/04/2016
Autoria: | CARVALHO, L. M. de; BENDA, N. D.; VAUGHAN, M. M.; CABRERA, A. R.; HUNG, K.; COX, T.; ABDO, Z.; ALLEN, L. H.; TEAL, P. E. A.
Afiliação: | LUCIANA MARQUES DE CARVALHO, CPATC.
Título: | Mi-1-mediated nematode resistance in tomatoes is broken by short-term heat stress but recovers over time.
Ano de publicação: | 2015
Fonte/Imprenta: | Journal of Nematology, v. 47, n. 2, p. 133-140, June, 2015.
Idioma: | Inglês
Conteúdo: | Tomato (Solanum lycopersicum L.) is among the most valuable agricultural products, but Meloidogyne spp. (root-knot nematode) infestations result in serious crop losses. In tomato, resistance to root-knot nematodes is controlled by the gene Mi-1, but heat stress interferes with Mi-1-associated resistance. Inconsistent results in published field and greenhouse experiments led us to test the effect of short-term midday heat stress on tomato susceptibility to Meloidogyne incognita race 1. Under controlled day/night temperatures of 258C/218C, ?Amelia?, which was verified as possessing the Mi-1 gene, was deemed resistant (4.1 ± 0.4 galls/plant) and Rutgers, which does not possess the Mi-1 gene, was susceptible (132 ± 9.9 galls/plant) to M. incognita infection. Exposure to a single 3 hr heat spike of 358C was sufficient to increase the susceptibility of ?Amelia? but did not affect Rutgers. Despite this change in resistance, Mi-1 gene expression was not affected by heat treatment, or nematode infection. The heat-induced breakdown of Mi-1 resistance in ?Amelia? did recover with time regardless of additional heat exposures and M. incognita infection. These findings would aid in the development of management strategies to protect the tomato crop at times of heightened M. incognita susceptibility.'
Palavras-Chave: | Tomato (solanum lycopersicum L).
Thesaurus Nal: | Meloidogyne; Nematoda.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/126610/1/Carvalho-MiTomato20and20heat.pdf
Registro original: | Embrapa Tabuleiros Costeiros (CPATC)
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