Mycorrhization and grafting improve the growth of tomato and decrease the population of Nacobbus aberrans

BERNARDO, VALERIA; RUSCITTI, MARCELA; DE ALMEIDA GUIMARÃES MARCELO; GARITA, SEBASTIÁN; ARANGO, MARÍA CECILIA

Revista Ciência Agronômica

Universidade Federal do Ceará

Lugar: Fortaleza; Año: 2019 vol. 50 p. 609 - 615

1806-6690

Both inoculation with mycorrhizal fungi and use of tolerant or resistant rootstocks are two strategies that allow for the control of nematodes and make possible the coexistence of plants with this pathogen. However, both techniques have always been tested in isolation, disregarding the possibility of taking advantage of the agregation and complementarity of their respective positive effects. In this study we compared two rootstocks in combination with mycorrhizal fungus Rizophagus intraradices in order to evaluate their behavior in the growth of plants in infested soil with Nacobbus aberrans, false root-knot nematode. The experiment was prepared in completely randomized design, using ten repetitions in a factorial arrangement 3 x 2 x 2. Treatments consisted of a combination of three factors: a) The compositions of plants: two rootstocks (Cherry tomato ´Carolina´ Solanum lycopersicum var. cerasiforme and tomato ´Maxifort´ S. lycopersicum), on which were grafted tomato ´Santa Clara´ S. lycopersicum; and an ungrafted Santa Clara used as control; b) Mycorrhization: mycorrhized or not mycorrhized roots; c) Infested or not infested substrate with N. aberrans. For dry weight of shoot, fresh weight of root and stem diameter, plants grafted onto Maxifort showed a significantly higher growth. The reproductive factor of both tested rootstocks was lower than that of the ungrafted plant. The mycorrhization helped reducing the number of days before flowering and contributed to decrease the N. aberrans population in the three tested plants.