Colonização micorrízica e nodulação radicular em mudas de sabiá (Mimosa caesalpiniaefolia Benth.) sob diferentes níveis de salinidade

Abstract

), com 3 repetições. Os resultados obtidos indicam que: a salinidade reduziu a colonização micorrízica e a nodulação radicular das mudas de sabiá; a intensificação das condições de estresse salino aumentaram a dependência micorrízica das mudas de sabiá; a colonização das mudas de sabiá com os FMAs proporcionou aumentos na matéria seca dos nódulos radiculares da ordem de 1900%; as micorrizas arbusculares reduziram o pH após o cultivo do solo; e a adição de vermicomposto não promoveu efeito sobre a colonização micorrízica das mudas de sabiá, entretanto, aumentou a produção de matéria seca dos nódulos radiculares. Palavras-chave: Sabiá (árvore). Salinidade. Microssimbiontes.ABSTRACT -The sabiá (Mimosa caesalpiniaefolia Benth.) is a plant species native to the Brazilian northeast and brings together some fundamental features for use in rehabilitation programs of salinized areas, especially if associated with arbuscular mycorrhizal fungi (AMF) and nitrogen-fixing bacteria (BFN). The aim of this study was to evaluate the mycorrhizal colonization and root nodulation of sabiá seedlings fertilized with organic compost and irrigated with water at different electrical conductivities. The experiment was carried out in a greenhouse, in a completely randomized design with a factorial scheme of 2 (presence and absence of arbuscular mycorrhizal fungi) x 2 (presence and absence of an organic compound) x 5 levels of electrical conductivity of the irrigation water (0.7, 1.2, 2.2, 3.2 and 4.2 dS m -1 ), and three repetitions. The results obtained indicate that: salinity reduced mycorrhizal colonization and root nodulation of the sabiá seedlings; intensifying salt-stress conditions increased the mycorrhizal dependence of the sabiá seedlings; the colonization of seedlings with AMF caused increases in the root-nodule dry matter of about 1900%; the arbuscular mycorrhiza reduced the pH after soil cultivation; and the addition of vermicompost had no effect on the mycorrhizal colonization of the sabiá seedlings, but did increase the production of root-nodule dry matter.

Influence of salinity on the development of the banana colonised by arbuscular mycorrhizal fungi

“…This result confirms those obtained by Tavares et al (2012) and Li Fan et al (2011) when studying mycorrhizal colonisation under different levels of salinity in plants of the sabiá and strawberry respectively. Lúcio et al (2013) also saw a reduction in AMC in melon plants at levels of salinity higher than 1.63 dS m -1 .…”

Crescimento e respostas fisiológicas do meloeiro inoculado com fungos micorrízicos arbusculares sob estresse salino

“…Os resultados mostraram um pico de colonização no tratamento com CEa 1,36 dS m -1 com tendência de redução a partir deste valor (Figura 2b). Estudo desenvolvido com mudas de sabiá demonstrou que a colonização micorrízica com Glomus clarum, Gomus intraradices e Glomus AZ112 apresentou comportamento quadrático, alcançando o máximo em 1,71 dS m -1 , e a partir desse ponto ocorreu decréscimo na colonozação com o aumento dos níveis de salinidade (TAVARES et al, 2012 …”

Microbial Interactions in the Development of the Biomass of Gliricidia

“…Further, a study by E Mello, Silva and Saggin-Júnior (2012) emphasizes that depending on the microorganism-plant interaction, the formation of nodules of nitrogen-fixing bacteria in the gliricidia can be stimulated by the presence of an arbuscular mycorrhizal fungi (AMF). Lastly, Tavares et al (2012) observed that with a mycorrhizal colonization in Mimosa caesalpinaefolia Benth, there was an increase in the dry matter mass of the root nodules of the nitrogen-fixing bacteria by 1900%.…”