Abstract

MARTINEZ NEVAREZ, Laura Elena et al. Response to induced Russula delica Fr. inoculation in Pinus engelmannii Carr. plants in the nursery. Rev. mex. de cienc. forestales [online]. 2016, vol.7, n.33, pp.108-117. ISSN 2007-1132.

The mycorrhiza is the symbiosis through which an exchange of mineral nutrients and carbohydrates is established between members of the Fungi and Vegetal kingdoms. Its presence is one of the morphological parameters to evaluate the quality of the forest plant grown in nursery. The objective of the present paper was to determine the effect of the induced inoculation with Russula delica on Pinus engelmannii plants grown in nursery. Sporomes were collected in a pine-oak forest, and the inoculum was prepared under controlled conditions for subsequent utilization. Two application methods (in substrate and in irrigation water) and four doses of the inoculum (0, 0.75, 1.50 and 2.25 g per tray) were evaluated. The experimental design was completely random, with factorial treatment arrangement. The response variables were: root neck diameter, dry root biomass, Dickson's quality index (QI), and mycorrhiza percent infection (MP). The variance analysis showed significant differences between treatments. The best results for the morphological variables were obtained with inoculation in irrigation water at a low dose. The highest MP occurred in the substrate inoculation treatment with a high dose, with highly significant differences in relation to the control.

Keywords : Forest plant quality; ectomycorrhiza; ectomycorrhizal inoculum; plant grown in nursery; mycorrhiza percent infection; Pinus engelmannii Carr.