https://repositorio.ufu.br/handle/123456789/18053 Mon, 14 Sep 2026 06:23:43 GMT 2026-09-14T06:23:43Z https://repositorio.ufu.br/handle/123456789/50111 Title: Germinação e desenvolvimento inicial de Banisteriopsis malifolia (Ness & Mart.) B. Gates (Malpighiaceae) condicionado pelo peso das sementes Abstract: The reproductive success of plants depends on several factors, including the presence of pollinators in cultivation areas, which can be increased by the presence of surrounding plants that regularly offer food resources to sustain populations of bees and other floral visitors capable of transporting pollen between flowers of the same species. For this, it is necessary to know relevant aspects for the production of seedlings of native and rustic species, such as the morphological characteristics of the fruits. Our objective was to investigate whether the weight of the fruits influences the germination and initial development of seedlings of Banisteriopsis malifolia (Nees & Mart.) B. Gates (Malpighiaceae), a rustic and native species of the Cerrado, recognized for providing pollen and floral oil to bees. Mature fruits were collected from 23 distinct plants and classified into four weight groups: very light (10–39.9 mg), light (40–59.9 mg), medium (60–79.9 mg), and heavy (80–110 mg). A total of 174 fruits were sown and monitored for 275 days. The results indicated that only medium and heavy fruits were able to germinate (16% and 29.16%, respectively). The development of seedlings was similar between the medium and heavy groups, with no significant differences in height, stem diameter, and number of leaves. The decrease in the number of leaves over time suggests a physiological adjustment to the availability of water resources. Our results indicate that the selection of heavier and medium fruits of B. malifolia can optimize seedling production. The low germination rate may indicate the presence of dormancy influenced by environmental factors, or that the seeds are recalcitrant and must be planted quickly after harvest to maintain viability, which deserves further studies. Keywords: Seedling production, fruit weight, Cerrado, seedling development, dormancy. Fri, 19 Sep 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50111 2025-09-19T00:00:00Z https://repositorio.ufu.br/handle/123456789/50039 Title: Substratos orgânicos, artesanais e comerciais, no desenvolvimento de plantas de anthurium gracile Abstract: The present study evaluated the effect of different substrates on the development of Anthurium gracile (Rudge) Lindl., an epiphytic species native to the Amazon with high ornamental potential. Two experiments were conducted in a greenhouse.Experiment 1 used plant material collected in Tefé (AM) and tested Amazonian residues (Brazil nut shell, sapucaia shell, and açaí seed) and commercial substrates, in a completely randomized design with seven treatments.Experiment 2, carried out in Uberlândia (MG), evaluated proportions of baru shell (0–80%) mixed with coconut fiber, in a 2 × 5 factorial design. The first factor consisted of two types of residues used as substrate at the bottom of the containers (baru shell or Brazil nut shell). The second factor corresponded to different proportions of baru shell (80, 60, 40, 20, and 0%). The evaluated variables included number of leaves, leaf dimensions, and fresh and dry mass. In Experiment 1, at 90 days, Brazil nut shell and açaí seed provided a greater number of leaves. In Experiment 2, 80% baru shell resulted in greater leaf length and root dry mass.The results demonstrated that A. gracile adapts to different substrates, with organic mixtures providing good aeration being more efficient than pure materials. The use of regional agro-industrial residues proved to be viable, contributing to sustainability and cost reduction, and providing a technical basis for the commercial cultivation of the species. Tue, 23 Dec 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50039 2025-12-23T00:00:00Z https://repositorio.ufu.br/handle/123456789/50019 Title: Fertilizante organofosfatado em associação com MAP na adubação de plantio da cultura do cafeeiro Abstract: Brazil is the world's largest coffee producer, cultivating primarily the species Coffea arabica (Arábica), over an area exceeding 1.8 million hectares. The coffee plant establishment phase requires careful nutritional management, phosphorus being a fundamental element of initial coffee plant development, and Brazil's dependence on imported phosphates represents a structural vulnerability for the national coffee industry. In this context, the trials evaluated an organophosphate fertilizer (OPF), produced from solid swine farming by-products treated in a biodigester, with monoammonium phosphate (MAP) in different proportions, in coffee planting fertilization. The trial was conducted on farms in the municipalities of Indianópolis and Rio Paranaíba, Minas Gerais, representing irrigated and rainfed cropping environments, respectively, using a randomized complete block design with four replications and five treatments: 100% single superphosphate (SS); 100% MAP; 100% OPF; 95% OPF + 5% MAP; and 90% OPF + 10% MAP. It was evaluated between 30 and 210 days after transplanting the variables plant height, SPAD index, stem diameter, soil and leaf samples. In Indianópolis, the combination of phosphate sources ensured a continuous supply of phosphorus to plants, enhanced nitrogen absorption and reduced the phosphorus fixation in the soil colloids, keeping the nutrient more available. In Rio Paranaíba, the combination of organophosphate with monoammonium phosphate promoted superior early plant growth and maintained superior performance at 210 days, it also increased the SPAD index, while the exclusive treatments resulted in a greater number of leaves. These results reinforce the potential of organophosphate fertilizer as a strategic input for reducing Brazil's dependence on imported phosphates. Fri, 24 Jul 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50019 2026-07-24T00:00:00Z https://repositorio.ufu.br/handle/123456789/49879 Title: Patogenicidade de agroathelia coffeicola em tecidos foliares de samambaia e cafeeiro Abstract: This study aimed to evaluate the pathogenicity of the fungus Agroathelia coffeicola isolated from bracken fern (Pteridium sp.) in leaf tissues of bracken fern (Pteridium sp.) and coffee plants (Coffea arabica) using different inoculation methods; to compare the severity between A. coffeicola isolates; to compare the severity in bracken fern and coffee plants; and to compare inoculation methods with and without wounding. The isolates were cultivated in potato-dextrose-agar medium and prepared for inoculation by two methods: without injury, using mycelial plugs of 3 mm in diameter; with injury using a wooden stick colonized by mycelium; and as controls, water-agar plugs and sterilized sticks were used, respectively. The inoculated leaf tissues were placed in acrylic boxes to create humid chambers, which were maintained using filter paper and distilled water, both sterilized. Ten days after inoculation (DAI), photographic documentation was performed to assess severity using ImageJ software. The tested isolates caused light brown necrotic spots on the leaf tissues of ferns and coffee plants and produced white aerial mycelium and light brown sclerotia. The two isolates evaluated did not show a difference in aggressiveness. The toothpick wounding method caused greater severity compared to the mycelial plug contact method. The A. coffeicola isolates used, originating from bracken fern, caused greater severity in bracken fern compared to coffee plants. Tue, 10 Feb 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/49879 2026-02-10T00:00:00Z