| Title | Interrelationship of Bradyrhizobium sp. and Plant Growth-Promoting Bacteria in Cowpea: Survival and Symbiotic Performance |
|---|---|
| Author | Artenisa Cerqueira Rodrigues1, Jadson Emanuel Lopes Antunes1, Antônio Félix da Costa2, José de Paula Oliveira3, and Marcia do Vale Barreto Figueiredo3* |
| Address | 1Soil Science Graduate Program, Federal Agricultural University of Pernambuco, Agronomy Department, UFRPE/DEPA, Recife, Pernambuco, Brazil, 2Phytopathology Laboratory, Agronomical Institute of Pernambuco, Recife, Pernambuco, Brazil, 3Soil Biology Laboratory, Agronomical Institute of Pernambuco, Recife, Pernambuco, Brazil |
| Bibliography | Journal of Microbiology, 51(1),49-55, 2013, |
| DOI | 10.1007/s12275-013-2335-2 |
| Key Words | PGPB, synergism, BNF, co-inoculation, colonization, Vigna unguiculata (L.) Walp. |
| Abstract | The objective of this study was to evaluate the survival of cowpea during bacterial colonization and evaluate the interrelationship of the Bradyrhizobium sp. and plant growthpromoting bacteria (PGPB) as a potential method for optimizing symbiotic performance and cowpea development. Two experiments using the model legume cowpea cv. “IPA 206” were conducted. In the first experiment, cowpea seeds were disinfected, germinated and transferred to sterilized Gibson tubes containing a nitrogen-free nutritive solution. The experimental design was randomized blocks with 24 treatments [Bradyrhizobium sp. (BR 3267); 22 PGPB; absolute control (AC)] with three replicates. In the second experiment, seeds were disinfected, inoculated according to their specific treatment and grown in Leonard jars containing washed and autoclaved sand. The experimental design was randomized blocks with 24 treatments [BR 3267; 22 BR 3267 + PGPB; AC] with three replicates. Scanning electron microscopy demonstrated satisfactory colonization of the roots of inoculated plants. Additionally, synergism between BR 3267 and PGPB in cowpeas was observed, particularly in the BR 3267 + Paenibacillus graminis (MC 04.21) and BR 3267 + P. durus (C 04.50), which showed greater symbiotic performance and promotion of cowpea development. |