Symbiotic effectiveness of Bradyrhizobium ingae in promoting growth of Inga edulis Mart. seedlings
| Autor: | Roberto Dantas de Medeiros, Jerri Édson Zilli, Josimar da Silva Chaves, Dilacy Sales Porto, Krisle da Silva, Eliane do Nascimento Cunha Farias, Brenda Ferreira Souza |
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| Jazyk: | angličtina |
| Předmět: |
040101 forestry
biology phosphate solubilization Soil Science food and beverages indolic compounds 04 agricultural and veterinary sciences biological nitrogen fixation biology.organism_classification Bradyrhizobium lcsh:S1-972 Symbiosis Bradyrhizobium ingae Botany Inga edulis 040103 agronomy & agriculture Nitrogen fixation 0401 agriculture forestry and fisheries lcsh:Agriculture (General) Agronomy and Crop Science Bacteria |
| Zdroj: | Revista Brasileira de Ciência do Solo, Vol 41, Iss 0 Revista Brasileira de Ciência do Solo, Volume: 41, Article number: e0160222, Published: 06 FEB 2017 Revista Brasileira de Ciência do Solo v.41 2017 Revista Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS |
| ISSN: | 1806-9657 |
| Popis: | Inga edulis Mart. is a leguminous tree adapted to acidic and low-fertility soils that establishes symbioses with nitrogen (N)-fixing bacteria. The identification of effective bacteria in biological N fixation may bolster the use of I. edulis in degraded or modified areas and agroforestry systems. Therefore, the aims of this study were evaluation of the symbiotic effectiveness of eight strains of the Bradyrhizobium genus native to Roraima in Inga edulis plants, and in vitro evaluation of the ability of the eight strains of Bradyrhizobium to develop plant growth-promoting characteristics. Determination of symbiotic effectiveness was carried out via three experiments: the first in a greenhouse in pots with a sterile substrate; the second in a greenhouse in pots containing non-sterile soil; and the third in a nursery in bags with a non-sterile substrate. Twelve treatments were evaluated: inoculation with eight strains of Bradyrhizobium ingae (ERR 490, ERR 492, ERR 493, ERR 494T, ERR 496, ERR 497, ERR 498, and ERR 569); inoculation with two strains indicated for Inga marginata, BR 6609 and BR 6610 (positive controls); no inoculation but with mineral N; and neither inoculation nor mineral N. All of the experiments were conducted in a completely randomized design with four replicates. The first experiment was conducted for 60 days, and the other experiments were conducted for 100 days. For all of the experiments, the number of nodules, nodule dry matter, root dry matter, shoot dry matter, number of leaflets, plant height, stem diameter, total N in the shoots, root/shoot dry matter ratio, Dickson’s quality index, relative effectiveness, and the Pearson correlation between the variables under study were evaluated. The strains were also evaluated by their ability to solubilize calcium and aluminum phosphates and to produce indolic compounds. The results showed that B. ingae strains were effective in biological N fixation, especially the ERR 493, ERR 498, and ERR 569 strains. These strains increased the production of shoot dry matter and total N and exhibited relative effectiveness higher than 100 % in all of the experiments. The B. ingae strains were also able to solubilize calcium and aluminum phosphates, despite their synthesis of indolic compounds. Thus, the strains of B. ingae can be used for inoculation in the production of I. edulis seedlings. |
| Databáze: | OpenAIRE |
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