The impact of salinity on mycorrhizal colonization of a rare legume, Galactia smallii, in South Florida pine rocklands

Abstract

ObjectivesThe success of restoration plantings depends on the capacity of transplanted individuals or seeds to establish and reproduce. It is increasingly recognized that restoration success depends quite heavily upon biotic interactions and belowground processes. Under stressful abiotic conditions, such as soils salinized by storm surge and sea level rise, symbiotic interactions with soil microbes such as mycorrhizae may be critically important. In this study, we investigate the impact of salinity on percent colonization of roots by arbuscular mycorrhizal fungi, in addition to the impacts of this colonization on plant fitness under saline conditions. Fifty Galactia smallii plants from an ex situ collection were subjected to a salinity treatment for 6 weeks, and 50 plants were untreated. Plants were harvested and assessed for percent colonization by arbuscular mycorrhizal fungi, nodule number, shoot and root dry biomass, and micronutrient content.ResultsColonization by arbuscular mycorrhizae was higher in plants in the salinity treatment than in untreated plants; plants in the salinity treatment were also found to have a lower root:shoot ratio, and higher phosphorus and nitrogen levels. These results support the importance of arbuscular mycorrhizal fungi in restoration efforts of endangered plants in fragmented and threatened ecosystems, such as pine rocklands.

Prevalence of needlestick injury among healthcare workers in Ethiopia: a systematic review and meta-analysis

“…The earliest study was conducted during 2009 [55], and the latest two articles were published in 2019 [58, 59]. Overall information regarding the prevalence of NSIs was obtained from five regions and two self-administrative cities including Amhara [41, 44, 47, 49, 51, 53, 57–59]; Oromia [42, 48, 56]; Southern Nations, Nationalities, and People (SNNP) [37, 46, 50]; Somali [38]; and Harari [43]; two studies were conducted on both Somali and Dre Dawa (SAC) [52, 55], and four articles were obtained from two self-administrative cities Addis Ababa and Dire Dawa [39, 40, 45, 54]. The sample size across the studies was ranged from 162 [37] to 760 [46].…”

“…The sample size across the studies was ranged from 162 [37] to 760 [46]. Among the studies, ten articles exclusively reported the 12-month NSI prevalence [38, 41, 42, 44, 50–53, 55, 56]. Similarly, seven studies exclusively reported the lifetime prevalence of the NSI [37, 39, 40, 47, 54, 57, 58].…”

Comportamiento en la absorción de Na y Pb en plantas de cucurbitáceas e inoculación de micorrizas arbusculares nativas en especie tolerante y suceptible

“…Frosi et al (2017 reportan que los hongos micorrízicos arbusculares facilitan una alta tasa de fotosíntesis neta y un mayor incremento de la biomasa en condiciones no salinas y salinas. Por su parte, Scharnagl et al (2018) reportan que los hongos micorrízicos arbusculares pueden reemplazar el papel de las raíces en el suelo, absorbiendo el agua y los nutrientes esenciales para las plantas que logran una mayor biomasa vegetal. Los hongos micorrízicos arbusculares desempeñan un papel fundamental en la absorción de los elementos y su destino en los sistemas suelo-planta (Wei et al 2016).…”

“…Estos resultados de colonización son similares a los reportados en diversos cultivos que alcanzaron porcentajes de colonización superiores al 40 % (Fernández Suárez et al 2017). Scharnagl et al (2018) reportaron una colonización entre el 10 y 100 % en Galactia smallii en condiciones salinas. Por otra parte, Begum et al (2019) mencionan que existe una mayor colonización micorrízica en condiciones de estrés abiótico.…”

Inorganic nitrogen uptake rate of Picea asperata curtailed by fine root acclimation to water and nitrogen supply and further by ectomycorrhizae

“…Nutrients‐for‐carbon exchange with the symbiotic fungi may not always be favorable to the host plant, particularly in very low resource environments, where nutrients may not be transferred to the host, utilized instead for producing mycelia (Näsholm et al, 2013). However, mycorrhizae are most often thought to enhance plant nutritional status and, thereby, plant growth, survival and crop yields (Albrechtova et al, 2012; Pawar et al, 2018; Scharnagl et al, 2018), tolerance to diseases (Bais et al, 2006), and abiotic stress, such as salinity (Lu et al, 2012) and drought (Brunner et al, 2015; Gianinazzi et al, 2010).…”