Mycorrhizal Dependency of Alcaparro (Senna pistaciifolia Kunth) at Three Concentrations of Soil Solution Phosphorus

Abstract

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.

Interactive Influence of Soil and Plant Genotypes on Mycorrhizal Dependency in Finger Millet

“…The growth of the host plant could be improved by the AM fungi only when the P available in the soil is a limiting factor for plant growth (Tawaraya 2003). Though most plant species acquire nutrients for their growth through AM association, the degree of plants dependence on AM fungi varies among plant species (Sierra Escobar et al 2015). However, some non-AM plant families including Brassicaceae and Amaranthaceae do Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42729-020-00212-2) contains supplementary material, which is available to authorized users.…”