Jatobazeiro seedlings associated with arbuscular mycorrhizal fungi

Abstract

The symbiotic association between native fruit species with Arbuscular Mycorrhizal fungi (AMFs) can contribute to the growth and quality of seedlings in soils with low nutrient availability. Thus, the objective of this study was to evaluate the effects of inoculation with AMFs and phosphate fertilization on the growth and quality of jatobazeiro seedlings ( LHymenaea courbaril.). The experiment was conducted in a completely randomized design in a 5 x 5 factorial scheme. The treatments were constituted by inoculation with the AMFs: Clareoideoglomus etunicatum, Rhizoglomus heterosporum, Rhizoglomus clarum, MIX (mixture of inoculations) and without inoculation with the AMFs, associated with five P doses: 0, 60, 120, 180 and 240 mg kg-1, with growth evaluation at 30, 60, 90, 120 and 150 days after transplantation (DAT). At 150 DAT, the production of biomass, the quality of seedlings, the chlorophyll index, the dependence and mycorrhizal efficiency were determined. Phosphorus did not contribute to the jatobazeiro seedlings growth in the conditions of this study. Seedlings with R. clarum and MIX had the highest growth at 150 DAT, while seedlings with R. clarum also resulted in a greater biomass accumulation. The mycorrhizal dependence and efficiency was affected by phosphate fertilization, evidencing that jatobazeiro is a kind of optional mycorrhizal association.

Arbuscular mycorrhizal fungi, phosphorus and organic residues in Peltophorum dubium (Spreng.) Taub. seedlings

“…It is noteworthy that varying results may emerge when evaluating seedling production of native species in association with different AMF, given that the benefits derived from symbiosis depend on the intricate interaction between microorganisms and hosts, as well as prevailing environmental conditions (Carvalho et al, 2022). Plant responses to inoculation are contingent upon the physiological and biochemical compatibility between the plants and AMF, which is intricately linked to the inherent behavior of each species (Frey, 2019).…”

“…Additionally, when organic residues were added to the soil, microbial activity in the substrate increased, potentially leading to lower AMF efficiency. According to Carvalho et al (2022), mycorrhizal colonization should not be the sole parameter for assessing efficiency, as certain AMF species can be highly infective but inefficient in nutrient provision, failing to enhance plant physiology and growth. The Dickson's Quality Index (DQI) of P. dubium seedlings was higher in seedlings produced with poultry and cattle manure (Figure 6).…”