Arbuscular mycorrhizal fungus influence maize root growth and architecture in rock phosphate amended tropical soil

Abstract

Influencia del hongo arbuscular micorrícico en el crecimiento y arquitectura radicular en suelo tropical modificado con fosforitaHemos ensayado la influencia del homgo micorrícizo arbuscular (AM) Scutellospora calospora en la estructura, crecimiento, asimilación de nutrientes, actividad fosfatasa y dependencia micorrizal de raíces de maíz por adicción de 0-5% de fosforita (RP) en suelos deficientes de fósforo (P). La adicción de RP aumentó significativamente la longitud total de la raíz, el número de raíces a diferentes niveles y el diámetro de los pelos radiculares de las plantas AM. El hongo AM influyó positivamente el crecimiento del maíz y la asimilación de nutrientes. Las actividades fosfatasa ácida y alcalina fueron mayores en las plantas AM en suelos mejorados. Al aumentar las concentraciones RP se redujeron no linealmente el porcentaje de colonización del hongo AM. Entonces, la inoculación de hongos AM junto a la mejora de fósfoso proveniente de RP podría sustituir fertilizantes químicos y hacer disponible el P proveniente de RP.Palabras clave: Hongo AM, Dependencia micorrizal, Nutrientes, Fósforo, Fosfatasa, Pelos radiculares. AbstractWe evaluated the influence of arbuscular mycorrhizal (AM) fungus Scutellospora calospora on root architecture, growth, nutrient uptake, root phosphatase activity and mycorrhizal dependency of maize in 0-5% rock phosphate (RP) amended phosphorus (P) deficient soil. RP amendment significantly increased total root length, number of roots in different orders, and root hair diameter of AM plants. The AM fungus positively influenced maize growth and nutrient uptake. Acid and alkaline phosphatase activities were higher for AM plants in RP amended soils. In contrast, increasing concentrations of RP reduced the percentage of AM fungus colonization non-linearly. Thus, AM fungus inoculation along with RP amendment could substitute chemical fertilizers and make available the P in RP to the plants.

Application of Native or Exotic Arbuscular Mycorrhizal Fungi Complexes and Monospecific Isolates from Saline Semi-Arid Mediterranean Ecosystems Improved Phoenix dactylifera’s Growth and Mitigated Salt Stress Negative Effects

“…In adverse environmental conditions, the AMF contributed to the increasing tolerance to abiotic and biotic stresses by their osmotic regulation and alleviation of oxidative stress [17,18,20]. Mechanisms of mycorrhizal plant tolerance to abiotic stresses, for instance, salinity, drought, as well as pollution, have critically been revised elsewhere [13,[21][22][23]. Despite the ubiquity of AMF in different harsh environmental conditions and their promising findings in protecting plants from stresses, few works have been undertaken to investigate the potential effects of AMF in fighting against salt stress in date palm [11,24,25].…”

Alleviation of cadmium and lead stress by A‐mycorrhizal fungi and rock phosphate on maize (Zea mays L.) growth under calcareous soil conditions

“…On the other hand, the results showed that the highest available nutrient content was achieved with plants treated with (M + RP), followed by treatment with AMF only (M). In the same line, Priyadharsini and Muthukumar (2017) reported that AMF could improve the P availability in soil treated with RP. AMF improve the capability of host plants to obtain nutrients from the soil (Entry, Rygiewicz, Watrud, & Donnelly, 2002; Javaid, 2009).…”

“…Similarly, Duponnois, Colombet, Hien, and Thioulouse (2005) showed that the addition of combined AMF and RP to the soil leads to improved all plant growth than the individual addition. In the same line, Priyadharsini and Muthukumar (2017) reported that the maize growth significantly enhanced with AMF + RP addition.…”

Effects of five mycorrhizal fungi on biomass and leaf physiological activities of walnut

“…In addition, AMF up-regulated mycorrhiza-specific P transporter genes to promote the P absorption by cells (Amijee et al, 1989). The mycorrhizal extraradical hyphae directly secretes phosphatase and indirectly promotes the root system to secrete organic acid to hydrolyze organophosphorus to inorganic phosphorus, all of these ways promote the uptake of P by plants (Duan et al, 2015;Perumalsamy et al, 2017).…”