EFFECTS OF THE ROOT-LESION NEMATODE PRATYLENCHUS-VULNUS AND THE VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGUS GLOMUS-MOSSEAE ON THE GROWTH OF 3 PLUM ROOTSTOCKS
A. Camprubi et al., EFFECTS OF THE ROOT-LESION NEMATODE PRATYLENCHUS-VULNUS AND THE VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGUS GLOMUS-MOSSEAE ON THE GROWTH OF 3 PLUM ROOTSTOCKS, Plant and soil, 153(2), 1993, pp. 223-229
The effects of Pratylenchus vulnus and the endomycorrhizal fungus Glom
us mosseae on growth of Myrobalan 605, Marianna 2624 and San Julian 65
5-2 plum rootstocks were measured under shadehouse conditions in the f
ield for two growing seasons (1990-91). Shoot dry weights were higher
in the majority of the vesicular-arbuscular mycorrhizal (VAM) alone in
oculated plants after both growing seasons. Root weights of mycorrhiza
l Myrobalan and Marianna were higher than root weights of the same roo
tstocks lacking mycorrhizae, inoculated with P. vulnus, and VAM in com
bination with the nematode. Mycorrhizal Marianna inoculated with the n
ematode showed a considerably higher final nematode population in rela
tion to non-inoculated VAM treatments. No correlation was found in the
number of nematodes per gram of root between mycorrhizal and non-myco
rrhizal treatments. P. vulnus adversely affected the mycorrhizal colon
ization in Marianna, but not in Myrobalan and San Julian. Marianna app
ears to be more mycorrhizal dependent than the two other rootstocks.