https://repositorio.ifgoiano.edu.br/handle/prefix/227 2026-03-14T06:59:36Z 2026-03-14T06:59:36Z Valente, Jéssica Barros Cabral https://repositorio.ifgoiano.edu.br/handle/prefix/6266 2026-03-05T17:44:22Z 2025-08-12T00:00:00Z

Título: POTENCIAL DE DIFERENTES ISOLADOS DE Trichoderma SPP. NO CONTROLE DE FITOPATÓGENOS E PROMOÇÃO DE CRESCIMENTO EM PLANTAS Autor(es): Valente, Jéssica Barros Cabral Primeiro Orientador: Geraldine, Alaerson Maia Primeiro Membro da Banca: Alves, José Milton Segundo Membro da Banca: Rocha, Geisiane Alves Abstract: This study evaluated the potential of native Trichoderma spp. isolates for the biological control of phytopathogens and promotion of growth in soybean and maize. Thirteen isolates obtained from soils in Goiás state were tested against Macrophomina phaseolina, Macrophomina sp., Fusarium sp., and Rhizoctonia solani. Laboratory assays included dual culture tests, antagonism scales, sporulation capacity, mycelial growth, and parasitism. Inoculum was produced by solid-state fermentation on parboiled rice and converted into conidial suspensions. Spore viability was monitored for up to 35 days under refrigerated (4°C) and frozen (−80°C) storage. Field experiments in randomized blocks were carried out during the 2023/24 season, with individual and combined isolate treatments compared with a commercial product and a control. Plant height, root and shoot dry mass, thousand-seed weight, and productivity were evaluated. Isolates P3, P6, and P10 showed vigorous growth, high sporulation, and parasitism against multiple pathogens. Spore viability remained above 70% under refrigeration for up to 21 days, while freezing drastically reduced survival after 14 days. In the field trial P3 and P6 application, alone or in combination, significantly increased plant height, dry biomass, and yield in soybean and maize, outperforming the control and performing similarly or better than the commercial product. These results indicate that native isolates of Trichoderma spp., particularly P3, P6, and P10, have high potential as biocontrol agents and bio-stimulants. They represent promising candidates for the development of biological formulations aimed at integrated disease management and sustainable agricultural systems in the Cerrado. Keywords: Trichoderma spp., bioprospecting, antagonism, bioinputs, biological control. Editor: Instituto Federal Goiano Tipo: Dissertação

2025-08-12T00:00:00Z Amorim, Anna Paulla Gonçalves de https://repositorio.ifgoiano.edu.br/handle/prefix/6165 2026-02-10T11:17:58Z 2024-08-20T00:00:00Z

Título: COINOCULAÇÃO DE BACTÉRIAS FIXADORAS DE NITROGÊNIO COM A APLICAÇÃO DE COBALTO E MOLIBDÊNIO NA CULTURA DO AMENDOIM Autor(es): Amorim, Anna Paulla Gonçalves de Primeiro Orientador: Cruz, Sihélio Júlio Silva Abstract: Peanut (Arachis hypogaea L.) is an oilseed crop of great food and socioeconomic relevance in Brazil and the world. Being the second most cultivated oilseed in Brazil. The experiment was conducted in a greenhouse at the Fazenda Escola do IF Goiano, in order to evaluate the effects of coinoculating seeds with Bradyrhizobium japonicum and Azospirillum brasilense and the application of cobalt and molybdenum on nodulation in peanut crops. The design used is a randomized block, with four replications, and a factorial combination (2 × 4) with the application or not of mo and co associated with four inoculation treatments. With the objective of evaluating the effects of seed coinoculation and the application of Co and Mo on nodulation, growth and dry matter partitioning of peanut plants. The data obtained were subjected to analysis of variance and compared using the Tukey test, at 5% probability. The application of inoculants and micronutrients, molybdenum and cobalt, proved to be a good strategy to improve cultivar development. Editor: Instituto Federal Goiano Tipo: Dissertação

2024-08-20T00:00:00Z Silva, Wmarley Goulart https://repositorio.ifgoiano.edu.br/handle/prefix/5863 2025-11-04T00:37:46Z 2025-03-21T00:00:00Z

Título: COINOCULAÇÃO COM BACTÉRIAS FIXADORAS DE NITROGÊNIO JUNTAMENTE COM ADUBAÇÃO NITROGENADO VIA FOLIAR NO CULTIVO DE SOJA Autor(es): Silva, Wmarley Goulart Primeiro Orientador: Cruz, Sihélio Júlio Silva Primeiro Membro da Banca: Cruz, Sihélio Júlio Silva Segundo Membro da Banca: Bottega, Daline Benites Abstract: The experiment was conducted in a commercial production area in the municipality of Diorama, GO. The experimental design used was a factorial scheme (4 x 2) with a randomized block design, with 4 repetitions for each treatment. Factor A consisted of soybean seed inoculation with (i) Bradyrhizobium japonicum, (ii) Azospirillum brasilense, (iii) co-inoculation with B. japonicum and A. brasilense, and without inoculation (control). The second factor was the application or not of nitrogen (N) via foliar spray at the V4 phenological stage (four trifoliate leaves). The experimental plot consisted of 5 rows of 5.0 m each, spaced 0.45 m apart, totaling 11.25 m². The soybean cultivar used in the experiment was Brasmax BÔNUS IPRO 8579 RSF. The parameters evaluated included the number of nodules per plant, dry mass of nodules, dry mass per nodule, plant height, leaf area index, SPAD chlorophyll index, shoot dry mass, root dry mass, total dry mass, thousand-grain weight, and grain yield at 13% moisture. At the end, the data obtained were subjected to analysis of variance, and if significant, the effects were compared by Tukey's test at a 5% probability. The technique of inoculation and/or co-inoculation of soybean seeds with Bradyrhizobium japonicum and/or Azospirillum brasilense, along with the application of nitrogen via foliar spray, increases the mass and number of nodules on the roots of soybean plants. The processes of inoculation and/or co-inoculation of seeds with Bradyrhizobium japonicum and/or Azospirillum brasilense enhance the growth of the shoot and roots of soybean plants, with positive effects on grain yield. Editor: Instituto Federal Goiano Tipo: Dissertação

2025-03-21T00:00:00Z Silva, Carlos Vinicius da https://repositorio.ifgoiano.edu.br/handle/prefix/5858 2025-11-03T23:51:08Z 2025-08-29T00:00:00Z

Título: ÁCIDO INDOLBUTÍRICO NO ENRAIZAMENTO DE CLONES DE SOJA PARA FINS DE MELHORAMENTO GENÉTICO Autor(es): Silva, Carlos Vinicius da Primeiro Orientador: Rubio Neto, Aurélio Primeiro Membro da Banca: Cruz, Sihélio Júlio Silva Segundo Membro da Banca: Silva, Tallyta Nayara Abstract: Soybean (Glycine max (L.) Merrill) is one of the main agricultural crops worldwide, playing a strategic role in global food and energy security. In breeding programs for this species, the availability of genetic material is often limited. To meet the growing demand for more productive and better-adapted cultivars, the indole-3-butyric acid (IBA) and aloe (Aloe vera (L.) Burm. f.) application was evaluated for rooting soybean cuttings as an alternative for vegetative propagation of elite genotypes in breeding programs. Concentrations of 0, 750, 1500, and 3000 mg L⁻¹ of IBA, with and without aloe, were tested using an aeroponic system as a controlled environment for root induction. The best treatments were compared with a commercial rooting gel. Morphophysiological parameters were evaluated throughout the growth cycle, including root length, number of leaves, plant height, and seed yield. Results showed that the absence or low doses of IBA favored rooting and root development without compromising shoot growth. In contrast, high doses inhibited cutting length, indicating possible phytotoxicity. The use of aloe as an additive did not impair rooting efficiency, proving to be a viable alternative. It is concluded that stem cutting combined with the IBA use, especially at moderate doses, is an effective strategy for cloning soybean plants, helping to overcome bottlenecks in the multiplication of genetic material during critical stages of breeding. These findings provide a basis for standardizing vegetative propagation protocols in soybean cultivation, with potential for both commercial and scientific applications. Editor: Instituto Federal Goiano Tipo: Dissertação

2025-08-29T00:00:00Z