Abstract
Mycorrhizal association contributes to plant growth, influencing tolerance to abiotic stresses such as water deficit. There is considerable variation in infection by arbuscular mycorrhizal fungi (AMF) in cultivars of the same crop, but there is little information regarding these differences in wheat. The objective of this work was to evaluate the influence of water deficit on the arbuscular mycorrhizal association in wheat genotypes in the Cerrado region and the association between soil attributes and mycorrhizal colonization. The experiment was conducted in a no-till system, using different water regimes. The experimental design was a randomized block with subdivided plots scheme, with 12 treatments and 3 repetitions. The plots consisted of 4 wheat genotypes and the subplots included 3 water regimes. Mycorrhizal colonization, soil microbial biomass carbon, total soil organic carbon, easily extractable glomalin-related soil protein, spore number and AMF species diversity were evaluated. Mycorrhizal colonization was not influenced by wheat genotypes, but it was favored by the higher water regime, being 44.8% higher when compared to the lower water regime. The soil moisture was positively correlated with the soil attributes with the exception of the number of AMF spores. The community of AMF associated with wheat genotypes was similar, comprising of 12 species, predominantly Claroideoglomus etunicatum and Glomus macrocarpum. The low variation among wheat genotypes for AMF diversity suggests no selective influence of the plants on the AMF community in the area of the study. Water regime was shown to be a dominant factor in mycorrhizal association.
Highlights
Water availability is one of the environmental variables that are crucial for agricultural production. This resource is at the center of the concerns of farmers, since climate change projections point to an increase in the number of consecutive days of drought, with possible effects in the regions with the highest water demand for agriculture, such as the Brazilian Cerrado (Avila-Diaz et al, 2020)
In the 2021 crop season, the total area planted in this region was of 106,600 hectares, which represented an increase of 84.7% from the previous harvest (CONAB, 2021)
The cultivation of the different wheat genotypes resulted in similar effect on microbial biomass carbon (MBC), Total soil organic carbon (TOC), glomalin-related soil protein concentration (GRSP-EE) contents, mycorrhizal colonization and arbuscular mycorrhizal fungi (AMF) spore density (Table 1)
Summary
Water availability is one of the environmental variables that are crucial for agricultural production. This resource is at the center of the concerns of farmers, since climate change projections point to an increase in the number of consecutive days of drought, with possible effects in the regions with the highest water demand for agriculture, such as the Brazilian Cerrado (Avila-Diaz et al, 2020) This region is home to 43% of the area of grain crops in Brazil (CONAB, 2021), but developing strategies capable of overcoming the cultivation limits in the winter period due to low rainfall represents an important possibility to increase production without expanding the area already cultivated. Breeding programs have been developed in the region seeking to adapt cultivars with lower water demand, with jas.ccsenet.org
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
