Use of Soil Microorganisms to Improve Plant Growth and Ecosystem Sustainability

Salamone, Inés E. García de

doi:10.5772/32814

Cited by 6 publications

(11 citation statements)

References 43 publications

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“…In addition, the results presented here coincide with those found by other researchers for other crops such as wheat (Creus, Sueldo, & Barassi, 2004;Di Salvo, Ferrando, et al, 2018;Naiman et al, 2009), rice (García de Salamone et al, 2010;Pedraza, Bellone, Carrizo de Bellone, Fernandes-Boa-Sorte, & Teixeira, 2009) and corn (Casaretto & Labandera, 2008;Di Salvo, Cellucci, et al, 2018;García de Salamone, 2012). The effect of PGPR inoculation observed only after glyphosate application may be related to the additive hypothesis posed by Bashan and Levanony (1990), which postulates that there are several PGPR mechanisms that can act simultaneously or in succession during the life cycle of a plant (Bashan, Holguin, & de-Bashan, 2004).…”

Section: Discussionsupporting

confidence: 92%

“…In this regard, the inclusion of tools to favour agroecosystem sustainability has been proposed where soybean is the only alternative incomegenerating crop. The inclusion of cover crops (Fernández, Quiroga, & Noellemeyer, 2012) and inoculation with plant growth promoting rhizobacteria (PGPR) (García de Salamone, 2012) are technological alternatives to promote the sustainability of these agroecosystems.…”

Section: Introductionmentioning

confidence: 99%

“…Inoculation with PGPR is an agronomic practice that can help increase cover crop biomass production in a more sustainable way (García de Salamone, 2012). These microorganisms are important in plant growth promotion through direct and indirect mechanisms (Goswami, Thakker, & Dhandhukia, 2016;Gupta, Parihar, Ahirwar, Snehi, & Singh, 2015;Singh, Ghosh, Kumar, & Kumar, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…and Pseudomonas spp. have been the most studied PGPR (Bashan & de Bashan, 2010;García de Salamone, 2012;Siddiqui, 2006). Therefore, these PGPR may have an important effect on agroecosystem sustainability because their inoculation contributes to the implantation, development and production of crops such as rice, wheat, corn, sorghum and sugarcane (Andrews et al, 2003;Berg, 2009;Di Salvo, Cellucci, Carlino, & García de Salamone, 2018;Di Salvo, Ferrando, Fernández Scavino, & García de Salamone, 2018;James, 2000;Lucy, Reed, & Glick, 2004;Okon, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…This is a highly dynamic and diverse microenvironment in which the huge number of processes and the highly diverse microbial communities responsible for them are still unknown (Hisinger, Glyn Bengough, Vetterlein, & Young, 2009;Pliego, Kamilova, & Lugtenberg, 2011). In this regard, several authors have claimed that it is necessary to improve knowledge on the microbial ecology of the rhizosphere (García de Salamone, 2012;Haldar & Sengupta, 2016;Minz, Ofek, & Hadar, 2013). As stated by conservation agriculture guidelines, the inclusion of cover crops between two soybean crops can guarantee the addition of a great amount of crop residues to preserve soil quality, which could contribute to the recovery of soil fertility and reduce the use of chemical fertilizers (Lara, Oviendo, & Betancur, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities

Ortega

Vásquez²,

Alba³

et al. 2020

European J Soil Science

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Knowledge of the rhizosphere and use of quality microbial bioinputs are tools to achieve agricultural sustainability. The impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities was evaluated. A field experiment in a randomized complete block design with factorial arrangement in sub‐divided plots was performed. Effects of fertilization (0 and 45 kg·ha−1), oats, rye and control without cover crops, plant growth promoting rhizobacteria (PGPR) co‐inoculation of Azospirillum brasilense and Pseudomonas fluorescens, and three sampling times on microbial counts, community‐level physiological profiles (CLPP) and terminal restriction fragment length polymorphism (T‐RLFP) were studied. CLPP were drastically changed at three sampling times: before glyphosate, after glyphosate and at soybean harvest. Before glyphosate application, the interaction between PGPR inoculation and coverage treatments modified the functional and structural profiles of the rhizosphere microbial communities. Furthermore, the highest microbial counts and the greatest functional diversity indices were observed before glyphosate application but significantly decayed after glyphosate application and at soybean harvest, showing a permanent impact of glyphosate application on the rhizosphere microbial community functionality, which was confirmed with several statistical analyses. For the cover crop–soybean agroecosystems, we can conclude that the rhizosphere microbial communities showed high sensitivity to glyphosate. PGPR inoculation only increased the aerial biomass of rye at the jointing and grain‐filling stages. Inoculated plants without fertilization and non‐inoculated plants with fertilization showed similar aerial biomass production of this crop. This work demonstrates that different management decisions can change plant–microorganism relationships in the rhizospheres of cover crops and impact aboveground biomass production. A better understanding of microbial ecology will allow the sustainable use of available resources.Highlights A field experiment was conducted using oats and rye as cover crops in succession with soybean. Management decisions changed plant–microorganism relationships and impact on microbial ecology. Management of cover crops with glyphosate had negative impacts on rhizosphere microbial communities. Co‐inoculation with Azospirillum brasilense and Pseudomonas fluorescens increased the aerial biomass production of rye.

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