Nano-enabled improvements of growth and colonization rate in wheat inoculated with arbuscular mycorrhizal fungi

ABSTRACT The low natural fertility of Brazilian soils requires the use of inoculants that facilitate the absorption of nutrients by plants. Arbuscular mycorrhizal fungi such as obligatory biotrophics of active roots perform this function, but access to this resource is limited by the difficulty in producing inoculants. The objective of this study was to investigate the production of AMF inoculants native of soils under different forest covers in Vitória da Conquista, BA, by means of spore quantification, colonization rate and species identification. For this purpose, soils were collected from sites under Mata Nativa (native forest) and plantations of Madeira Nova (Pterogyne nitens) and Eucalyptus, placed into separate 500 mL disposable cups with seeds of Brachiaria sp. and cultivated for five months. Spores were quantified and the AMF species identified in the control soil (without brachiaria) and in the cups cultivated with brachiaria at each month. From the first month, the colonization rate of brachiaria roots was evaluated. The inoculants produced showed differences in the number of spores and species, in the AMF species identified, and in the root colonization rate as a function of the forest cover. Thus, considering the increase in the number of spores, species and colonization over time, the inoculant produced from the soil under native forest was more promising for utilization.

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ARBUSCULAR MYCORRHIZAL FUNGI ASSOCIATED WITH PEPPER TEN LINES RHIZOSPHERE CHILLIES Capsicum frutescens

Ipê Agronomic Journal ◽

10.37951/2595-6906.2019v3i1.4322 ◽

2019 ◽

Vol 3 (1) ◽

pp. 107-115

Author(s):

Wagner Gonçalves Vieira Junior ◽

Diogo Jânio de Carvalho Matos ◽

Thales Caetano de Oliveira ◽

Leidiane Dos Santos Lucas ◽

Isabelly Ribeiro Lima ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Mycorrhizal Fungi ◽

Arbuscular Mycorrhizal ◽

Culture Collection ◽

Mycorrhizal Colonization ◽

Colonization Rate ◽

Spore Density ◽

Capsicum Frutescens ◽

Morphological Comparison ◽

Significant Difference

The peppers business is an important segment of the Brazilian agricultural market, with strong expression in the food, pharmaceutical and cosmetic industries. The objective of this work was to determine the mycorrhizal colonization rate, spore density and mycorrhizal fungi genotypes associated with the rhizosphere of ten lines of chilli peppers (Capsicum frutescens). The experimental design was completely randomized, with 10 treatments and 4 replicates, with the ten strains of Capsicum frutescens: IFET-1121; IFET-1109; IFET-1129; IFET-1119; IFET-1117; IFET-1137; IFET-1131; IFET-1127; IFET-1125 and IFET-1111. The spores of arbuscular mycorrhizal fungi (AMF) will be extracted from the soil using 50 cm³ of each composite sample, using the wet sieving technique. The determination of the percentage of mycorrhizal colonization occurred through the technique of intersection of the quadrants. The identification of mycorrhizal fungi species was by morphological comparison based on the descriptions of the reference cultures present in the International Culture Collection of Arbuscular and Vesicular-Arbuscular Mycorrhizal Fungi. The spore number and mycorrhizal colonization data will be submitted to classical statistical analysis using the Assistat program (2016). The genus Acaulospora, Claroideoglomus, Diversispora, Scutellospora, Sclerocystis, Glomus, Funneliformis and Gigaspora associated with the rhizosphere of the Capsicum frutescens strains were identified. The genera Glomus, acaulosporand Claroideoglomuswere found in all strains analyzed. The IFET - 1127 strain presented higher spore density values when compared to the other strains studied. No significant difference was found in the values of mycorrhizal colonization rate among the investigated strains

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The influence of compost and arbuscular mycorrhizal fungi on sugarcane growth and nutrient uptake

BioResources ◽

10.15376/biores.16.2.3005-3016 ◽

2021 ◽

Vol 16 (2) ◽

pp. 3005-3016

Author(s):

Gustavo Mattos Abreu ◽

Gabrielly dos Santos Bobadilha ◽

Bruna Duque Guirardi ◽

Phillipe Mattos Abreu ◽

Naelmo de Souza Oliviera ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Nutrient Uptake ◽

Biomass Production ◽

Mycorrhizal Fungi ◽

Organic Matter Content ◽

Arbuscular Mycorrhizal ◽

Mycorrhizal Colonization ◽

Colonization Rate ◽

Initial Growth ◽

Mycorrhizal Dependency

Compost and Arbuscular mycorrhizal fungi are environmentally sustainable and low-cost materials that can benefit tropical soils with high phosphorus fixation and low organic matter content. This study investigated the effects of Arbuscular mycorrhizal fungi (AMF) and compost on the growth and nutrient uptake efficiency of sugarcane (Saccharum officinarum) seedlings. The experimental design was a completely randomized factorial design, where factor A (n = 5) was the compost doses (0, 15, 30, 60 and 120 t ha-1) and B (n = 3) the AMF inoculum (Rhizophagus clarus, Gigaspora margarita, and non-inoculated). At 30 and 90 d, seedlings’ diameter and height were measured. Mycorrhizal colonization rate, biomass production, nutrient uptake (P and N), and mycorrhizal dependency were assessed at the end of the experiment. The AMF and compost doses affected the colonization rate, initial growth, biomass production, and nutrient uptake of sugarcane seedlings. Overall, the AMF benefited plant growth at lower doses of compost. R. clarus had a higher impact on the shoot diameter of sugarcane seedlings. Mycorrhizal colonization increased with compost addition only in seedlings inoculated with G. margarita. There was no clear trend among AMF treatments for nutrient uptake. In general, sugarcane seedlings dependency on mycorrhizal condition to produce growth was higher at lower compost doses.

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Mycorrhizal Structures in the Native Grasses from Cluj-Napoca Parks

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:2018.0034 ◽

2018 ◽

Vol 75 (2) ◽

pp. 106-109

Author(s):

Vlad STOIAN ◽

Roxana VIDICAN ◽

Florin PĂCURAR ◽

Ioana CRIȘAN ◽

Ioana VAIDA ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Plant Development ◽

Mycorrhizal Fungi ◽

Higher Plants ◽

Urban Parks ◽

Arbuscular Mycorrhizal ◽

Colonization Rate ◽

Native Grasses ◽

Human Intervention ◽

Colonization Frequency

Urban parks are ecosystems with a dynamic directed by human intervention. Arbuscular mycorrhizal fungi are symbionts with higher plants, with role in increasing the amount of nutrients needed to plant development. In roots, the fungi develops various structures for transfer or storage of nutrients. The grasses developed in the parks of the Cluj-Napoca city present typical mycorrhizal structures, including the two morphotypes of arbuscules. The colonization rate identified in the analyzed samples is over 75%, indicating a high number of propagules in soil. The dependence of arbuscles is higher to intensity than colonization frequency.

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