Development of wheat plants coinoculated with rhizobium strains/Desenvolvimento de plantas de trigo coinoculadas com estirpes de rizobio.

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Publisher: ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
Document Type: Article
Length: 4,288 words

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Abstract :

HIGHLIGHTS: Noduliferous bacteria can increase wheat yield. Coinoculation of Azospirillum brasilense and Rhizobium tropic! improved total grain mass in wheat plants. Strains MT 08, MT15 and MT 16 isolated from legume nodules show potential for use in wheat plants. This study aimed to evaluate the efficiency of diaztrophic bacteria coinoculation in wheat cultivars grown in Cerrado Oxisol. A randomized block design was used, with a 13 x 3 factorial scheme and four replicates. The treatments consisted of inoculation with Azospirillum brasilense (strains AbV5 and AbV6 strains combined) and coinoculation with Bradyrhizobium japonicum (strains SEMIA 5079 and SEMIA 5080 combined, and strain BR3267), as well as Rhizobium tropici (strains MT08 and MT15) and R. leguminosarum (strain MT16) combined or in isolation, tested in wheat cultivars BRS 394, BRS 264 and BRS 254. The variables analyzed were grain nitrogen concentration and accumulation and crude protein content, 100-grain weight and total grain mass. The treatment containing the commercial cowpea inoculant showed a higher total grain mass (5.8766 g). Interaction was observed for grain nitrogen concentration, particularly for A. brasilense + MT 15 (R. tropici) and MT 15 in wheat cultivar BRS 264. Coinoculation with diazotrophic bacteria isolated from leguminous plants shows potential for use in wheat cultivars. Keywords: Triticum aestivum L., associative bacteria, biofertilization Objetivou-se com esse estudo avaliar a eficiencia da coinoculacao de bacterias diazotroficas no desenvolvimento de cultivares de trigo em Oxisol do Cerrado. O experimento foi conduzido em delineamento de blocos ao acaso, esquema fatorial 13x3 com quatro repeticoes. Os tratamentos foram compostos pela inoculacao de Azospirillum brasilense (estirpes AbV5 e AbV6 combinadas) e coinoculacao com Bradyrhizobium japonicum (estirpes SEMIA 5079 e SEMIA 5080 combinadas, e estipe BR3267), Rhizobium Tropici (estirpes MT08 e MT15), R. leguminosarum (estirpe MT16), de forma isolada ou combinada, testados em tres cultivares de trigo: BRS 394, BRS 264 e BRS 254. As variaveis analisadas foram, concentracao, acumulo de nitrogenio e proteina bruta nos graos, massa de 100 graos e massa total dos graos. O tratamento contendo a inoculacao de inoculante comercial para feijao caupi apresentou a maior massa total de graos (5,8766 g). Houve interacao na concentracao de nitrogenio nos graos, com destaque da combinacao de A. brasilense + MT 15 (R. tropici) e MT 15 isolados quando associados a cultivar BRS 264. A coinoculacao com bacterias diazotroficas isoladas de plantas leguminosas tem potencial para uso em cultivares de trigo. Palavras-chave: Triticum aestivum L., bacterias associativas, biofertilizacao

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Gale Document Number: GALE|A674989394