Comparative histopathology of virulent and avirulent Meloidogyne javanica populations on susceptible and resistant tomato plants.

Autor:	Gabriel M; Universidade Federal de Santa Maria, Santa Maria-RS, Dep. de Agronomia, Brazil.; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil., Santos MFA; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil., Mattos VS; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil., Gomes ACMM; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil., de Almeida SF; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil.; Universidade de Brasília, Dep. de Fitopatologia, Brasília, DF, Brazil., Castagnone-Sereno P; INRAE, Université Côte d'Azur, CNRS, ISA, Sophia Antipolis, France., Boiteux LS; Embrapa Hortaliças (CNPH), Brasília, Brazil., Cares JE; Universidade de Brasília, Dep. de Fitopatologia, Brasília, DF, Brazil., Carneiro RMDG; Embrapa Recursos Genéticos e Biotecnologia (Cenargen), Brasília, Brazil.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2024 Aug 23; Vol. 15, pp. 1425336. Date of Electronic Publication: 2024 Aug 23 (Print Publication: 2024).
DOI:	10.3389/fpls.2024.1425336
Abstrakt:	The Mi- 1.2 gene confers resistance to a wide range of Meloidogyne species, being the most important resistance factor employed in tomato breeding so far. However, many aspects related to the interaction of Mi- 1.2-carrying tomato cultivars and virulent/avirulent Meloidogyne populations have not yet been clarified. Herein, comparative histopathological analyses were carried after inoculation of the homozygous ( Mi -1.2/ Mi -1.2) tomato rootstock 'Guardião' and the susceptible cultivar 'Santa Clara' ( mi -1.2/ mi -1.2) with virulent and avirulent populations of M. javanica. In the susceptible control, it was possible to visualize second stage juveniles (J2) of avirulent population and feeding sites from 2 to 30 days after infection (DAI) with females reaching maturity at 24-34 DAI. In the resistant rootstock, the Mi- 1.2 gene-mediated resistance was related mainly to early defense responses (pre-infection and hypersensitive reaction), which led to an immunity-like phenotype that completely prevented the reproduction of the avirulent Meloidogyne population. On the other hand, J2s of the virulent M. javanica population were able to penetrate roots much more than the avirulent population, migrated and developed normally, showing intense and similar pattern of penetration from 4 to 34 DAI in the root tissues of both resistant and susceptible tomato genotypes. The total numbers of J2, J3, J4, and females counted in 'Santa Clara' for the virulent population of M. javanica were higher than in 'Guardião'. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2024 Gabriel, Santos, Mattos, Gomes, de Almeida, Castagnone-Sereno, Boiteux, Cares and Carneiro.)
Databáze:	MEDLINE
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