Plant growth-promoting endophytic bacteria on maize and sorghum

Authors

  • João Pedro Alves de Aquino UFPI
  • Francisco Barbosa de Macedo Junior UFPI
  • Jadson Emanuel Lopes Antunes UFPI
  • Marcia do Vale Barreto Figueiredo IPA/PE
  • Francisco de Alcântara Neto UFPI
  • Ademir Sérgio Ferreira de Araujo UFPI http://orcid.org/0000-0002-3212-3852

Abstract

Plant growth-promoting bacteria (PGPB) are found in plant tissues and promote plant growth by secretion of hormones and enzymes, or by facilitating the nutrient uptake. This study assessed forty PGPB isolates to determine their effects on maize and sorghum growth. These isolates were also compared with uninoculated plants, as negative (-N; without N fertilization) and positive (+N; with N fertilization) controls. Plant height, stem diameter, shoot and root dry mass, leaf N accumulation and chlorophyll content were evaluated. For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N, and the responses for root mass were higher than in plants supplied with N. However, the PGPB isolates did not promote N accumulation and chlorophyll content similar to those of uninoculated plants supplied with N. The IPACC26 and IPACC30 isolates, both identified as Bacillus subtilis, resulted in better responses for plant growth and N accumulation than the other isolates.

KEYWORDS: Bacillus subtilis, nitrogen accumulation, chlorophyll.

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Author Biography

Francisco Barbosa de Macedo Junior, UFPI

Eng. Agr., Dr. Professor Adjunto do Centro de Ciencias Agrárias, UFPI. Área: Microbiologia e Bioquimica do Solo.

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Published

2019-10-16

How to Cite

AQUINO, J. P. A. de; MACEDO JUNIOR, F. B. de; ANTUNES, J. E. L.; FIGUEIREDO, M. do V. B.; ALCÂNTARA NETO, F. de; ARAUJO, A. S. F. de. Plant growth-promoting endophytic bacteria on maize and sorghum. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 49, p. e56241, 2019. Disponível em: https://revistas.ufg.br/pat/article/view/56241. Acesso em: 30 jun. 2024.

Issue

Vol. 49 (2019)

Section

Research Article

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