Response of roots of different plants to the presence of the false root-knot nematode Nacobbus aberrans.

TORDABLE, M. DEL C.; LAX, P.; DOUCET, M.E; BIMA, P.; RAMOS, D.; VARGAS, L.

RUSSIAN JOURNAL OF NEMATOLOGY

MYLNEFIELD RESEARCH SERVICES

Año: 2010 p. 31 - 39

0869-6918

Nacobbus aberrans is native to the American continent and produces severe damage to several crops. The response of roots of potato (Solanum tuberosum), tomato (S. lycopersicum) and weed quinoa (Chenopodium album) inoculated with nematodes from the localities Coronel Baigorria (CB) and Río Cuarto (RC) (province of Córdoba, Argentina) was evaluated. Quantitative parameters (number of galls and Gall index) and qualitative parameters (histological studies that evaluate alterations in root tissues) were estimated. The populations differed in their capacity to invade roots. Neither was able to infest potato; the most efficient hosts for CB and RC were quinoa and tomato, respectively. At the histological level, potato did not show symptoms of nematode attack. Hyperplastic tissue in the central cylinder with transformed cells forming syncytia along vascular cells was present in galls of tomato and quinoa. While each population showed preference for a single plant, the histological analyses did not reveal differences between the alterations induced by a single population on the two infested plants, but they did reveal between-population differences in the response of tissues of tomato and weed quinoa to the parasite attack.