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Volume 13
Issue 16
10.3390/su13169354
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Article

Potential Bioinoculants for Sustainable Agriculture Prospected from Ferruginous Caves of the Iron Quadrangle/Brazil

by
Camila G. C. Lemes
1,
Isabella F. Cordeiro
1,
Camila H. de Paula
1,
Ana K. Silva
1,
Flávio F. do Carmo
2,
Luciana H. Y. Kamino
2,
Flávia M. S. Carvalho
3,
Juan C. Caicedo
4,
Jesus A. Ferro
3 and
Leandro M. Moreira
1,5,*
1
Programa de Pós-Graduação em Biotecnologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, MG, Brazil
2
Instituto Prístino, Belo Horizonte 30642-180, MG, Brazil
3
Departamento de Tecnologia, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal (FCAV), Universidade Estadual Paulista (UNESP), Jaboticabal 14884-900, SP, Brazil
4
Faculty of Natural Sciences, Universidad de Santander, Bucaramanga 680003, Colombia
5
Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, MG, Brazil
*
Author to whom correspondence should be addressed.
Sustainability 2021, 13(16), 9354; https://doi.org/10.3390/su13169354
Submission received: 29 June 2021 / Revised: 5 August 2021 / Accepted: 10 August 2021 / Published: 20 August 2021
(This article belongs to the Special Issue Beneficial Microbes for Sustainable Agriculture)
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Abstract

Biocontrol and plant growth-promoting bacteria (PGPB) are important agricultural bioinoculants. This study aimed to prospect new potential bioinoculants for a more sustainable agriculture from ferruginous caves of the Brazilian Iron Quadrangle. Culturable bacteria, from seven caves and one canga soil sample, were evaluated for biocontroller activity of the phytopathogens Xanthomonas citri subsp. Citri—Xcc306 (citrus canker), Fusarium oxysporum—Fo (fusariosis), and Colletotrichum lindemuthianum—Cl89 (bean anthracnose). The ability of the superior candidates to solubilize inorganic phosphate, fix nitrogen, and produce hydrolytic enzymes and siderophores was then analyzed. Out of 563 isolates, 47 inhibited the growth of Xcc306 in vitro, of which 9 reduced citrus canker up to 68% when co-inoculated with the pathogen on host plants. Twenty of the 47 inhibited Fo growth directly by 51–73%, and 15 indirectly by 75–81%. These 15 inhibited Cl89 growth in vitro (up to 93% directly and 100% indirectly), fixed nitrogen, produced proteases and siderophores, showed motility ability, produced biofilm, and all but one solubilized inorganic phosphate. Therefore, 15 (2.66%) bacterial isolates, from the genera Serratia, Nissabacter, and Dickeya, act simultaneously as biocontrollers and PGPBs, and could be important candidates for future investigations in planta as an alternative to minimize the use of pesticides and chemical fertilizers through sustainable agricultural management practices.
Keywords: bioinoculants; ferruginous caves; bacterial prospecting; plant growth promoters bioinoculants; ferruginous caves; bacterial prospecting; plant growth promoters

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MDPI and ACS Style

Lemes, C.G.C.; Cordeiro, I.F.; de Paula, C.H.; Silva, A.K.; do Carmo, F.F.; Kamino, L.H.Y.; Carvalho, F.M.S.; Caicedo, J.C.; Ferro, J.A.; Moreira, L.M. Potential Bioinoculants for Sustainable Agriculture Prospected from Ferruginous Caves of the Iron Quadrangle/Brazil. Sustainability 2021, 13, 9354. https://doi.org/10.3390/su13169354

AMA Style

Lemes CGC, Cordeiro IF, de Paula CH, Silva AK, do Carmo FF, Kamino LHY, Carvalho FMS, Caicedo JC, Ferro JA, Moreira LM. Potential Bioinoculants for Sustainable Agriculture Prospected from Ferruginous Caves of the Iron Quadrangle/Brazil. Sustainability. 2021; 13(16):9354. https://doi.org/10.3390/su13169354

Chicago/Turabian Style

Lemes, Camila G. C., Isabella F. Cordeiro, Camila H. de Paula, Ana K. Silva, Flávio F. do Carmo, Luciana H. Y. Kamino, Flávia M. S. Carvalho, Juan C. Caicedo, Jesus A. Ferro, and Leandro M. Moreira. 2021. "Potential Bioinoculants for Sustainable Agriculture Prospected from Ferruginous Caves of the Iron Quadrangle/Brazil" Sustainability 13, no. 16: 9354. https://doi.org/10.3390/su13169354

APA Style

Lemes, C. G. C., Cordeiro, I. F., de Paula, C. H., Silva, A. K., do Carmo, F. F., Kamino, L. H. Y., Carvalho, F. M. S., Caicedo, J. C., Ferro, J. A., & Moreira, L. M. (2021). Potential Bioinoculants for Sustainable Agriculture Prospected from Ferruginous Caves of the Iron Quadrangle/Brazil. Sustainability, 13(16), 9354. https://doi.org/10.3390/su13169354

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