Application of Glomus deserticola as bio-fertilizer of Gasteraloe in saline growing medium and biocontrol of Fusarium sp.

In this study the possibility of using a biostimulant based on Glomus deserticola to improve the growth and quality of Gasteraloe plants and protection against Fusarium sp. was evaluated. Objectives of the work were: i) use Glomus deserticola to assess whether the use of this Arbuscular mycorrhizal fungi can increase the growth rate of Gasteraloe plants generally slow in their growth cycle; ii) consider if the use of Glomus deserticola can lead to an increase in plant resistance under saline substrate conditions; iii) evaluate how the use of Glomus deserticola allows greater protection of plants from Fusarium sp. which often affects the roots of these succulents. The four experimental groups in cultivation were: i) group without Glomus, irrigated with water and substrate previously fertilized; ii) group without Glomus, irrigated with salt water (0.50 g of NaCl Kg-1 dry soil) and substrate previously fertilized; iii) group with Glomus deserticola, irrigated with water and substrate previously fertilized; iv) group with Glomus deserticola, irrigated with salt water (0.50 g of NaCl Kg-1 dry soil) and substrate previously fertilized. The test showed a significant increase in agronomic parameters analyzed in plants treated with Glomus deserticola on Gasteraloe cv. Magica and Gasteraloe aristata x platinum. The test also highlighted how the use of mycorrhizae in particular of Glomus spp. can determine a greater resistance against salt stress and greater protection against attacks of Fusarium sp. The application of mycorrhizae in the cultivation of succulent plants guarantees growers the possibility of obtaining a superior quality product, greater resistance to biotic and abiotic stress, an increase in the growth rate and mineral content of the tissues, aspects that are then found in the improvement of the quality of the plants and consequently their commercialization.

Hongos micorrízicos arbusculares asociados a la rizosfera de Agave cupreata en regiones mezcaleras del estado de Michoacán, México

Antecedentes: Los hongos micorrízicos arbusculares (HMA) forman asociaciones simbióticas con la mayoría de las especies vegetales, por lo cual es importante conocer la riqueza, diversidad y funcionalidad de estas especies de HMA.Objetivo: Determinar la composición y abundancia de esporas de HMA asociados a la rizosfera de Agave cupreata en la época seca y de lluvia en regiones mezcaleras de Michoacán. Métodos: En dos épocas se muestreó suelo rizosférico de A. cupreata en ocho sitios; parte de los suelos de cada sitio se usó para la propagación de HMA. Las esporas de los HMA se identificaron taxonómicamente con base en su morfología, por sitio, época de muestreo y maceta de propagación.Resultados y conclusiones: Se encontraron 39 morfo-tipos de HMA. Las familias Glomeraceae y Acaulosporaceae registraron la mayor abundancia de morfo-tipos, 37 y 34%, respectivamente. Acaulospora scrobiculata, A. spinosa y Glomus deserticola se encontraron en todos los sitios de muestreo; Rhizophagus intraradices sólo se detectó en las macetas de propagación. El 29% de los morfo-tipos sólo se encontró en la época seca, el 16% en la época de lluvia y el 55% en ambas épocas de muestreo; en las macetas se propagaron sólo el38% de los morfo-tipos.

Polish Endogonaceae. 4. Gigaspora gigantea, Glomus deserticola, and Glomus globiferum

Morphlogical features of three species of the <i>Endogonaceae</i> and their occurrences and distributions in Poland had been studied.