home    about    browse    search    latest    help 
Login | Create Account

Effect of Low-Input Organic and Conventional Farming Systems on Maize Rhizosphere in Two Portuguese Open-Pollinated Varieties (OPV), “Pigarro” (Improved Landrace) and “SinPre” (a Composite Cross Population)

Ares, Aitana; Costa, Joana; Joaquim, Carolina; Pintado, Duarte; Santos, Daniela; Messmer, Monika M. and Mendes-Moreira, Pedro M. (2021) Effect of Low-Input Organic and Conventional Farming Systems on Maize Rhizosphere in Two Portuguese Open-Pollinated Varieties (OPV), “Pigarro” (Improved Landrace) and “SinPre” (a Composite Cross Population). Frontiers in Microbiology, 12, p. 636009.

[thumbnail of fmicb-12-636009.pdf] PDF - English
Available under License Creative Commons Attribution.

4MB

Document available online at: https://www.frontiersin.org/articles/10.3389/fmicb.2021.636009/full


Summary

Maize is one of the most important crops worldwide and is the number one arable crop in Portugal. A transition from the conventional farming system to organic agriculture requires optimization of cultivars and management, the interaction of plant–soil rhizosphere microbiota being pivotal. The objectives of this study were to unravel the effect of population genotype and farming system on microbial communities in the rhizosphere of maize. Rhizosphere soil samples of two open-pollinated maize populations (“SinPre” and “Pigarro”) cultivated under conventional and organic farming systems were taken during flowering and analyzed by next-generation sequencing (NGS). Phenological data were collected from the replicated field trial. A total of 266 fungi and 317 bacteria genera were identified in “SinPre” and “Pigarro” populations, of which 186 (69.9%) and 277 (87.4%) were shared among them. The microbiota of “Pigarro” showed a significant higher (P < 0.05) average abundance than the microbiota of “SinPre.” The farming system had a statistically significant impact (P < 0.05) on the soil rhizosphere microbiota, and several fungal and bacterial taxa were found to be farming system-specific. The rhizosphere microbiota diversity in the organic farming system was higher than that in the conventional system for both varieties. The presence of arbuscular mycorrhizae (Glomeromycota) was mainly detected in the microbiota of the “SinPre” population under the organic farming systems and very rare under conventional systems. A detailed metagenome function prediction was performed. At the fungal level, pathotroph–saprotroph and pathotroph–symbiotroph lifestyles were modified by the farming system. For bacterial microbiota, the main functions altered by the farming system were membrane transport, transcription, translation, cell motility, and signal transduction. This study allowed identifying groups of microorganisms known for their role as plant growth-promoting rhizobacteria (PGPR) and with the capacity to improve crop tolerance for stress conditions, allowing to minimize the use of synthetic fertilizers and pesticides. Arbuscular mycorrhizae (phyla Glomeromycota) were among the most important functional groups in the fungal microbiota and Achromobacter, Burkholderia, Erwinia, Lysinibacillus, Paenibacillus, Pseudomonas, and Stenotrophomonas in the bacterial microbiota. In this perspective, the potential role of these microorganisms will be explored in future research.


EPrint Type:Journal paper
Keywords:maize, microbiota, rhizosphere, organic and conventional farming system, open-pollinated populations, next-generation sequencing
Agrovoc keywords:
Language
Value
URI
English
maize
http://aims.fao.org/aos/agrovoc/c_12332
English
farming systems
http://aims.fao.org/aos/agrovoc/c_2807
English
microbial flora
http://aims.fao.org/aos/agrovoc/c_16367
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Breeding, genetics and propagation
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Seeds and breeding > Plant breeding
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Arable crops > Root crop
European Union > Horizon 2020 > Liveseed
DOI:10.3389/fmicb.2021.636009
Deposited By: Ferrari, Leone
ID Code:39495
Deposited On:20 Apr 2021 09:53
Last Modified:20 Apr 2021 09:53
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page

Downloads

Downloads per month over past year

View more statistics