Mycorrhizal Dependency of Alcaparro (Senna pistaciifolia Kunth) at Three Concentrations of Soil Solution Phosphorus / Dependencia Micorrizal de la Alcaparra (Senna pistaciifolia Kunth) bajo Tres Concentraciones de Fosforo en la Solucion del Suelo

• Published in: Revista Facultad Nacional de Agronomía, Medellín Vol. 68; no. 1; pp. 7451 - 7458
• Main Authors: Sierra Escoba, Jorge Alberto, Dagoberto Castro Restrepo, Osorio Vega, Nelson Walter
• Format: Journal Article
• Language: English; Spanish
• Published: Bogota Universidad Nacional de Colombia 01.01.2015
• Subjects: Bioassays; Fungi; Glomus; Phosphates; Plant growth; Soil fertility
• ISSN: 0304-2847; 2248-7026

A greenhouse bioassay was carried out to determine the mycorrhizal dependency of alcaparro (Senna pistaciifolia Kunth). A randomized complete experimental design was employed, with six treatments in a factorial arrangement 3x2; the treatments consisted of three levels in soil solution phosphorus (P) (0.002, 0.02, and 0.2 mg L-1) combined with two levels of mycorrhizal inoculation either uninoculated or inoculated with Glomus agreggatum. The variables studied were leaf P content as a function of time, shoot dry matter, shoot P content, mycorrhizal colonization of roots, and the mycorrhizal dependency (MD). The results indicate that the leaf P content increased significantly with the mycorrhizal inoculation in alcaparro to 0.02 mg L-1 after the second sampling days, but not in the other soil P levels. Likewise, shoot dry weight increased significantly at 0.02 mg L-1. On the other hand, the total plant P content increase at all levels of soil available P. The mycorrhizal colonization in alcaparro roots was 11, 23, and 0% at 0.02, 0.002 and 0.2 mg of P L-1, respectively. The MD for alcaparro was 32%, which allow classify this specie as moderately dependent on the mycorrhizal association.