Elite Bradyrhizobium strains boost biological nitrogen fixation and peanut yield in tropical drylands.

Autor: Jovino RS; Universidade Estadual da Paraíba (UEPB), PB, Campina Grande, Brazil., da Silva TR; Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), PA, Petrolina, Brazil., Rodrigues RT; Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), PA, Petrolina, Brazil., de Sá Carvalho JR; Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana, BA, Brazil., Cunha JBA; Departamento de Tecnologia e Ciências Sociais, Universidade do Estado da Bahia (UNEB), Juazeiro, BA, Brazil., de Lima LM; Embrapa Algodão, Campina Grande, PB, Brazil., Dos Santos RC; Embrapa Algodão, Campina Grande, PB, Brazil., Santos CERES; Departamento de Agronomia, Universidade Federal Rural de Pernambuco (UFRPE), Recife, PE, Brazil., Ribeiro PRA; Fundação de Amparo à Pesquisa do Estado de Pernambuco (Facepe), Recife, PE, Brazil.; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasília, DF, Brazil.; Embrapa Semiárido, BR 428, Km 152, Zona Rural, CP 23, Petrolina, PE, CEP: 56302-970, Brazil., de Freitas ADS; Departamento de Agronomia, Universidade Federal Rural de Pernambuco (UFRPE), Recife, PE, Brazil., Martins LMV; Departamento de Tecnologia e Ciências Sociais, Universidade do Estado da Bahia (UNEB), Juazeiro, BA, Brazil., Fernandes-Júnior PI; Embrapa Semiárido, BR 428, Km 152, Zona Rural, CP 23, Petrolina, PE, CEP: 56302-970, Brazil. paulo.ivan@embrapa.br.
Jazyk: angličtina
Zdroj: Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] [Braz J Microbiol] 2022 Sep; Vol. 53 (3), pp. 1623-1632. Date of Electronic Publication: 2022 Jul 09.
DOI: 10.1007/s42770-022-00792-4
Abstrakt: Peanut (Arachis hypogaea L.) is an important crop for the family-based systems in the tropics, mainly in Brazil. In the Brazilian drylands, peanuts are cropped in low technological systems, and cheap and efficient technologies are needed to improve crop yield and sustainability. Despite this importance, few data are available on selecting efficient peanut rhizobia in experiments under different edaphoclimatic conditions. This work evaluated the agronomic efficiency and the biological nitrogen fixation (BNF) by two elite Bradyrhizobium strains under four different fields in the Brazilian semiarid region. We compared a new efficient strain Bradyrhizobium sp. ESA 123 with the reference strain B. elkanii SEMIA 6144, currently used in peanut rhizobial inoculants in Brazil. Besides the inoculated treatments, two uninoculated controls were assessed (with and without 80 kg ha -1 of N-urea). The BNF was estimated by the δ 15 N approach in three out of four field assays. BNF contribution was improved by inoculation of both Bradyrhizobium strains, ranging from 42 to 51% in Petrolina and 43 to 60% in Nossa Senhora da Glória. Peanuts' yields benefited from the inoculation of both strains and N fertilization in all four assays. Nevertheless, the results showed the efficiency of both strains under different edaphoclimatic conditions, indicating the native strain ESA 123 as a potential bacterium for recommendation as inoculants for peanuts in Brazil, mainly in drylands.
(© 2022. The Author(s) under exclusive licence to Sociedade Brasileira de Microbiologia.)
Databáze: MEDLINE
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