Is arbuscular mycorrhizal fungal species community affected by cotton growth management systems in the Brazilian Cerrado?

Abstract

Conventional cotton production in western Bahia, Brazil, involves intensive use of agricultural inputs and mechanization, which may affect arbuscular mycorrhizal fungi (AMF). This work aimed at studying the impact of conventional and organic cotton production in the AMF of western Bahia. Soil samples were obtained from conventional white cotton and colored cotton organic production systems as well as from native Cerrado areas, close to the white cotton fields, and from the subcaducifolia vegetation, close to the organic colored cotton farms. The most frequent species in the conventional farming areas belonged to the genera Acaulospora (10 spp.); Glomus (8 spp.); Dentiscutata (3 spp.); Ambispora, Pacispora and Scutellospora (2 spp. each), as well as Claroideoglomus etunicatum, Diversispora sp., Entrophospora infrequens, Gigaspora sp., Orbispora pernambucana, Paradentiscutata maritima, and Paraglomus occultum. eighteen species were found in the organic farming areas, with the predominance of Glomus (5 spp.) and Acaulospora (5 spp.), and with Claroideoglomus, Dentiscutata, Gigaspora, Corymbiglomus, Orbispora, Paraglomus, Scutellospora, and Simiglomus (1 spp. each). Paraglomus bolivianum was first reported in Cerrado. In the native vegetation, nine species were found, with the predominance of Glomus and Acaulospora. The highest number of AMF species was found in the organic farming areas, which deserves further investigation.

Mycorrhizal Association in Wheat Genotypes Submitted to Variable Irrigation in the Brazilian Cerrado

“…The predominance of species that belong to the families Glomeraceae, Acaulosporaceae and Gigasporaceae is consistent with the assessment of the AMF community in no-till areas cultivated with wheat (Schalamuk & Cabello, 2010). The two species with the highest frequency in the study area, Claroideoglomus etunicatum and Glomus macrocarpum (Table 3), have already been identified with higher occurrence in agricultural areas, in conventional and conservationist systems, as well as in native Cerrado areas (Fernandes et al, 2016;Ferreira et al, 2012;Nunes et al, 2019;Pontes et al, 2017). The high frequency of a species of the genus Claroideoglomus (Claroideoglomus claroideum) was reported in an area cultivated with wheat in southern Chile (Castillo et al, 2016).…”

Invasion of Celtis tala forests by Ligustrum lucidum in Argentina: impact on soil properties and the arbuscular mycorrhizal fungi community

“…This number is comparable to and even greater than the number of Glomeromycota species reported for other forests in Argentina (Soteras et al 2015) and other regions of the world (Montaño et al 2012, Cofré et al 2019). Among the AMF families, Glomeraceae was dominant in all sites, as previously reported for various environments (Stover et al 2012, Brundrett and Ashwath 2013, Nunes et al 2019. The abundance of members of this family is related to the ability to produce a large spore number in short periods of time to ensure survival, as well as their wide tolerance to various stress and disturbance factors (Daniell et al 2001).…”