MORPHOLOGICAL AND PHYSIOLOGICAL ALTERATIONS CAUSED BY Nacobbus aberrans IN TOMATO PLANTS.

GARITA, S.; ARANGO, C.; BERNARDO, V.; RUSCITTI, M.; RIPODAS, J. I.

Caldas Novas, Goiás.

Congreso; XXXVI Congresso Brasileiro de Nematologia; 2019

Sociedade Brasileira de Nematología

Nacobbus aberrans is a phytoparasitic nematode that forms galls in the roots of its hosts. Crops affected by this nematode have lower aerial growth, lower productivity and may wilt at times of day when temperature and irradiance are high. The aim of this presentation is to characterize the morphophysiological alterations that N. aberrans causes in tomato plants, Solanum licopersicon. A number of 20 tomato seedlings var. Yigido were transplanted into 15 L pots, using tindalized soil as a substrate. Half of them were inoculated with 5000 N. aberrans eggs. Taken 90 days after inoculation, measurements of the inoculated plants showed a 42% reduction in the net Photosynthesis (μmol CO2/[m2/s]) and a 24,02% reduction in the stomatal conductance (mmol/[M2/s]) compared to the non-inoculated plants. It was also observed that the leaves of the infected plants had a significantly lower content (p