CHARACTERIZATION AND SELECTION OF NATIVE POPULATIONS OF SOIL RHIZOBIA OF THE SEMI-ARID REGION OF PERNAMBUCO, BRAZIL

Authors

  • Valéria Nogueira da Silva
  • Luiz Eduardo de Souza Fernandes da Silva
  • Márcia do Vale Barreto Figueiredo
  • Fabíola Gomes de Carvalho
  • Maria Luiza Ribeiro Bastos da Silva
  • Apolino José Nogueira da Silva

Keywords:

Rhizobia, morphologic characteristics, high temperature

Abstract

The evaluation of native rhizobia strains potential as related to efficiency, competitiveness, and adaptation in regions subjected to high temperature is important to the study of nitrogen symbiotic fixation. The objective of this research was the morphologic characterization of rhizobia isolated from samples of a red yellow argisol of Serra Talhada municipality, Pernambuco State, Brazil, and selection for high temperature and kanamicina and nalidixic acid antibiotics resistance. The study was carried out at Institute of Agricultural Research of Pernambuco (IPA). The isolates were cultivated in YMA media to evaluate colonie characteristics as acidity or alkalinity production, growing velocity, color, shape and transparency, elevation, and mucus production. All isolates were compared to the standard strain Bradyrhizobium sp. 6145, recommended for cowpea. The morphological and physiological diversity of the isolates enabled the identification of distinct groups. The isolates 1, 2 and 4 presented higher resistance to high temperature and adaptation to survive in regions subjected to thermal stress periods. The isolate 1 showed the highest resistance to tested antibiotics.

KEY-WORDS: Rhizobia; morphologic characteristics; high temperature.

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Author Biography

Valéria Nogueira da Silva

Empresa Pernambucana de Pesquisa Agropecuária (IPA). Av. Gal. San Martin, 1371, CEP 50751-000 Recife, PE.

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Published

2007-10-09

How to Cite

SILVA, V. N. da; SILVA, L. E. de S. F. da; FIGUEIREDO, M. do V. B.; CARVALHO, F. G. de; SILVA, M. L. R. B. da; SILVA, A. J. N. da. CHARACTERIZATION AND SELECTION OF NATIVE POPULATIONS OF SOIL RHIZOBIA OF THE SEMI-ARID REGION OF PERNAMBUCO, BRAZIL. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 37, n. 1, p. 16–21, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/1841. Acesso em: 22 dec. 2024.

Issue

v. 37, n. 1, Jan./Mar. 2007

Section

Research Article

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