Vol. 61 No. 1 (2022)
Articles

Susceptibility of crop plants to the root-knot nematode Meloidogyne luci, a threat to agricultural productivity

Carla MALEITA
University of Coimbra, Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II – Pinhal de Marrocos, 3030-790 Coimbra
António CORREIA
University of Coimbra, Centre for Functional Ecology - Science for People & the Planet, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra
Isabel ABRANTES
University of Coimbra, Centre for Functional Ecology - Science for People & the Planet, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra
Ivânia ESTEVES
University of Coimbra, Centre for Functional Ecology - Science for People & the Planet, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra
Published May 13, 2022
Keywords
  • Gall index,
  • pathogenicity,
  • reproduction factor,
  • plant-parasitic nematodes
How to Cite
[1]
C. MALEITA, A. CORREIA, I. ABRANTES, and I. ESTEVES, “Susceptibility of crop plants to the root-knot nematode Meloidogyne luci, a threat to agricultural productivity”, Phytopathol. Mediterr., vol. 61, no. 1, pp. 169-179, May 2022.

Funding data

Abstract

The root-knot nematode (RKN) Meloidogyne luci is included in the Alert List of the European Plant Protection Organization, because it has potential negative impacts on economically important crops. Identification of plant species/cultivars resistant to M. luci is important for its management. Susceptibility of 35 commercial plant species/cultivars, from nine families to a M. luci isolate from Portugal was evaluated in pot assays, assessing root gall index (GI) and reproduction factor (Rf) 60 d after inoculation, with tomato ‘Coração-de-Boi’ used as the positive susceptible experimental control. Presence/absence of RKN resistance genes was also determined in the tomato and pepper cultivars. One cultivar of cabbage, three of lettuce, ten of pepper, one of sugar beet, and all the cultivars of Cucurbitaceae (five), Fabaceae (two) and Poaceae (one) were susceptible to M. luci (GI = 4-5; Rf = 2.1-152.3). One cultivar each of carrot, passion fruit, lettuce ‘Cocktail’, cabbage ‘Bacalan’, ‘Coração’ and ‘Lombarda’, and spinach ‘Tayto’ were resistant/hypersensitive (Rf < 1; GI > 2). The tomato ‘Actimino’, ‘Briomino’, ‘Veinal’ and ‘Vimeiro’, which carried at least one copy of the Mi-1.2 gene, were resistant to the nematode (GI = 1-2; 0.0 < Rf < 0.1). These results indicate that the tomato cultivars have potential to contribute to reduction of M. luci populations in agro-ecosystems and improve the crop yields.

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