THE ROLE OF Pseudomonas STRAINS AND ARBUSCULAR MYCORRHIZA FUNGI AS ORGANIC PHOSPHATE–SOLUBILIZING IN THE YIELD AND QUALITY IMPROVEMENT OF STRAWBERRY (Fragaria × ananassa Duch., cv. Selva) FRUIT

Abstract

This study evaluated the effect of Pseudomonas strains and arbuscular mycorrhiza fungi (AMF) in enhancing strawberry yield and phenolic and antioxidant capacity on a phosphorus (P) deficient calcareous soil. The experiments were conducted in three replicates with six treatments (four Pseudomonas strains, AMF and control) and three rates of P-fertilizer (0, 75, 150 kg P ha-1). Application of higher phosphate rates decreased total antioxidant capacity, total phenolic and flavonols content, whereas AMF and Pseudomonas strains increased quality and P concentration of fruit. The use of AMF and Pseudomonas strains resulted in better quality when used along with 75 kg P ha-1. These results demonstrated that the rhizospheric microorganisms improved the quality of fruit, especially when they applied in combination with lower rates of chemical fertilizers. Therefore, application of these microorganisms in sustainable agriculture is recommended.

ALLEVIATION OF SOIL SALINITY ON PHYSIOLOGICAL AND AGRONOMIC TRAITS OF RICE CULTIVARS USING Arbuscular mycorrhizal fungi AND Pseudomonas STRAINS UNDER FIELD CONDITIONS

“…However, single inoculation of AMF and Pseudomonas species increased grain yield but the highest rates were observed in co-inoculated plants and their synergetic impact on grain yield and yield components was remarkable. These findings are same to that of Espidkar et al (2017), Viollet et al (2017) and Ansari et al (2018). They demonstrated that colonization of AMF helper bacteria such as Pseudomonas, adhere to the root surface and improve AMF-plant symbiosis relations.…”

“…Based on the findings of Ruiz-Lozano et al (2012), during the salt stress, AMF symbiosis exerts vast morphologic changes in rice that provides it for salt tolerance and the majority of these changes these changes concern vacuolar or cytoplasmic membrane systems. Ansari et al (2018) reported that under drought stress, plants with higher heights may increase final grain weight and yield during the grain filling by remobilization process. On the other hands, rice grain yield is a function of different components like fertile tiller number, panicle number, grain number and grain weight so, impact of treatments on grain yield is defined by impacting on yield components.…”

“…Increase in these components impact on grain yield in rice which is in accordance with our findings. The reason for increase in grain components of AMF plants may be attributed to increase in macronutrients uptake like N (Ansari et al, 2018), P (Daei et al, 2009) and K (Halder et al, 2015) especially in saline soil. Furthermore, AMF symbiosis alters rates of water flow in, through and out of plant (Bárzana et al, 2012;Jha and Subramanian, 2013) and its impact on improving root hydraulic conductivity, stomatal conductivity, and rate of gas exchange has been confirmed (Augé, 2004;Ruiz-Lozano et al, 2012;Bárzana et al, 2014).…”

Mycorrhizal frequency, physiological parameters, and yield of strawberry plants inoculated with endomycorrhizal fungi and rhizosphere bacteria

“…However, they did not observe any effect of the fungi on the TSS/TA ratio in the fruit. In a study by Ansari et al (2018), a marked increase in TSS and TA was observed in mycorrhizal strawberry plants grown under phosphorus deficiency. In the present study, a negative impact of Rhizocell C on the TSS content of strawberry fruit was observed.…”

Effects of the fruiting period and growing seasons on market quality in goji berry (Lycium barbarum L.)

“…It is reported that the fruits harvested in the early period of the successive harvested fruit species are superior in terms of pomological properties; while the fruit flesh hardness and phytochemical characteristics are at lower levels (Zorenc et al, 2016). Moreover, these fruits are not suitable for storage due to their high pectinase enzyme activity and respiration rate (Erkan and Pekmezci, 2004;Ali et al, 2018;Ansari et al, 2018). Moreover, this situation will be opposite if the harvesting period is extended and continued.…”