Anatamy of stem galls of sunflower (Helianthus annuus) infected by Meloidogyne javanica in a glasshouse experiment was studied. A progressive number of infective juveniles penetrated roots and stems of seedlings during germination in infetsed soilwith more than 8 eggs and juveniles/cm3 soil. Nematode infective stages penetrated stem tissues and established thei feeding sites mainly in the cambium; stem swellings were caused by pronounced hyperthrophy of cambial cells at the feeding sites. The size of galls and the production of giant cells in the aerial part, induced by a single nematode, were similar to those observed on the roots. Egg masses with hardned gelatinous Matrix appeared within 50 days, usually protruding from the stem surface.
Anatomy of Sunflower Stem Galls Induced by the Root-knot Nematode, Meloidogyne javanica
Vovlas N;Sasanelli N
1993
Abstract
Anatamy of stem galls of sunflower (Helianthus annuus) infected by Meloidogyne javanica in a glasshouse experiment was studied. A progressive number of infective juveniles penetrated roots and stems of seedlings during germination in infetsed soilwith more than 8 eggs and juveniles/cm3 soil. Nematode infective stages penetrated stem tissues and established thei feeding sites mainly in the cambium; stem swellings were caused by pronounced hyperthrophy of cambial cells at the feeding sites. The size of galls and the production of giant cells in the aerial part, induced by a single nematode, were similar to those observed on the roots. Egg masses with hardned gelatinous Matrix appeared within 50 days, usually protruding from the stem surface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
