AUTHOR=Moura Jadson Belem de , Ramos Maria Lucrécia Gerosa , Konrad Maria Luiza de Freitas , Saggin Júnior Orivaldo José , Ribeiro Junior Walter Quadros , Carvalho Arminda Moreira de , Santos Luana de Miranda , Souza Rodrigo Fernandes de , Lopes Filho Luiz César , Dutra e Silva Sandro 

TITLE=Arbuscular mycorrhizal fungi in the soil using cover crops with and without nitrogen addition

JOURNAL=Frontiers in Plant Science

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1054484

DOI=10.3389/fpls.2022.1054484

ISSN=1664-462X

ABSTRACT=<p>This study aimed to evaluate the occurrence of mycorrhizal fungi and glomalin content in soil under different cover crops with and without the application of nitrogen in the cover. The following cover plants were used: Crotalaria juncea (<italic>Crotalaria juncea</italic> L.), wild beans from Ceará (<italic>Canavalia brasiliensis</italic> Mart. ex Benth.), Guandú ‘BRS mandarin’ [<italic>Cajanus cajan</italic> (L.) Millsp.], millet ‘BR05’ [<italic>Pennisetum glaucum</italic> (L.) R.Br.] and sorghum ‘BR 304’ [<italic>Sorghum bicolor</italic> (L.) Moench]. The absolute control of the experiment was the treatment without the use of cover crops, that is, the vegetation of spontaneous occurrence in the area. The experimental design was randomized blocks in subplots with three replications. Spore density, mycorrhizal colonization rate, easily extractable glomalin, and species present in the rhizosphere of the cover crops were determined. No differences were found in the diversity of mycorrhizal fungi associated with the different cover crops studied or in the values of spore density, root colonization, or glomalin content. Nitrogen application did not influence the mycorrhizal activity in the investigated cover crops. The most frequent species associated with cover crops were <italic>Scutellospora pellucida</italic> and <italic>Scutellospora persica</italic> in <italic>C. juncea</italic>; <italic>Gigaspora</italic> sp. on Sorghum; <italic>Glomus macrocarpum</italic> in Guandu; <italic>G. macrocarpum</italic> and <italic>Glomus clavisporum</italic> in millet; and <italic>Glomus microaggregatum</italic> and <italic>Glomus tortuosum</italic> in Spontaneous Vegetation.</p>