https://ri.ufs.br/jspui/handle/riufs/2152 2026-05-28T18:08:09Z https://ri.ufs.br/jspui/handle/riufs/24749 Título: Características morfogênicas, estruturais e produtivas de acessos de capim-buffel Autor(es): Moreira, José Armando de Sousa; Fagundes, Jailson Lara; Mistura, Claudio; Lemos, Nailson Lima Santos; Moreira, José Nilton; Backes, Alfredo Acosta; Morais, Juciléia Aparecida da Silva; Oliveira, Veronaldo Souza de; Moreira, Andréia Luciane Abstract: Although the buffel grass is so important to the productive systems in the semiarid Brazilian studies with this forage are still scarce and diffused, so this experiment was conducted to evaluate the morphogenesis, structural and productive six accessions of buffel grass (Cenchrus ciliaris L.) belonging to the active germplasm bank (BAG) Embrapa semiarid. The experiment was conducted at the Department of Technology and Social Sciences (DTCS) University of Bahia (UNEB), from December 2008 to January 2009. The experimental design was completely randomized with six accessions of buffel grass (Tanzania, Pusa Giant, Aridus, Buchuma, Iran and Biloela) and five replicates, totaling 30 experimental units. Regarding the results, the accessions differed significantly in most variables, especially in morphogenetic and structural variables. It was observed that the buffel grass provides a mean rate of appearance of one sheet every four days in each tiller, with a lifetime of sheet 17 days, keeping ten per tiller. Although they found morphogenetic and structural differences between accessions of buffel grass they did not affect the production parameters. 2015-02-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24742 Título: Uso de Bacillus aryabhattai na cultura do milho: tolerância à seca, aspectos fisiológicos e produtividade Autor(es): Barbosa, João Pedro Ferreira Abstract: Climate change has intensified the frequency and severity of drought periods, affecting maize (Zea mays L.) production. In this context, the use of plant growth-promoting rhizobacteria (PGPR) has emerged as a sustainable biotechnological alternative to mitigate water deficit stress. Among PGPR, Bacillus aryabhattai, strain CMAA 1363, originally isolated from the roots of Cereus jamacaru, a cactus native to the Caatinga biome, promoted drought tolerance and growth in several crops. This dissertation, divided into three articles, characterizes the role of B. aryabhattai, strain CMAA 1363 in mitigating water deficit stress and promoting growth in maize plants. In Article 1, the impact of inoculation under well-watered and water-deficient conditions was evaluated in a pot experiment conducted under controlled greenhouse conditions. Inoculation alleviated the effects of water deficit by increasing relative water content (RWC) and the activity of the antioxidant enzymes superoxide dismutase, catalase, and ascorbate peroxidase, reducing electrolyte leakage (EL) and proline content, and protecting the photosynthetic apparatus, as evidenced by the preservation of chlorophylls and improvements in the oxygen-evolving complex (OEC), reaction center/absorption ratio (RC/ABS), performance indices (PIabs and PIcs), and absorption-based driving force (DFabs). Under wellwatered conditions, inoculation also promoted beneficial changes in OEC, RC/ABS, PIabs, PIcs, DFabs, and energy fluxes per cross-section. In both water regimes, improvements in morpho-agronomic parameters were observed, particularly increased root dry mass. In Article 2, the objective of the experiment was to mitigate water deficit stress during the vegetative stage of maize through inoculation with B. aryabhattai strain CMAA 1363, aiming to understand its subsequent effects on crop productivity after stress exposure. In this field experiment, the PGPR also promoted higher RWC and antioxidant activity of CAT and APX, reduced EL and proline content, and protected the photosynthetic apparatus, which was reflected in improved morphoagronomic parameters and increased productivity. Finally, in Article 3, the effect of inoculation on maize plants during the reproductive stage was evaluated. In this experiment, inoculation increased RWC, reduced EL, and protected the photosynthetic apparatus under water deficit stress; however, these beneficial ecophysiological changes were not reflected in increased productivity. In well-watered conditions, the effect was even more pronounced, with higher chlorophyll indices and photochemical efficiency, yet without greater productivity. Therefore, inoculation with B. aryabhattai strain CMAA 1363 represents a promising strategy for promoting growth and drought tolerance in maize plants, particularly during the vegetative stage of the crop. 2026-02-09T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24446 Título: Caracterização de germoplasma e armazenamento de patchouli (Pogostemon sp.) Autor(es): Sant’ana, Trícia Cavalcanti Pergentino de Abstract: The species Pogostemon cablin Benth. – Lamiaceae can be detached between the species of this genus because of the production of essential oil extracted from the dried leaves, which possesses medicinal, repellent and insecticide properties and is principally important for the perfume industry. The aim of this work was to install an Active Germplasm Bank of patchouli (Pogostemon sp.) at the Research Farm "Campus Rural da UFS", to evaluate the morphologic, agronomic and chemical characterization of the accessions, besides to test the influence of storage time of dry leaves on the essential oil content and chemical composition. The first chapter presents the general introduction, the literature review of botany and use of species of the genus Pogostemon, essential oil of P. cablin, conservation and morphological, agronomic and chemical characterization of vegetative germplasm, cultivation and post-harvest of P. cablin, and sustainability of agroecosystems. The second chapter presents and discusses the data of the morphological and agronomic characterization of 10 Pogostemon accessions of the Active Germplasm Bank (AGB) of the Universidade Federal de Sergipe (UFS) harvested in four seasons, may, august and november 2008 and february 2009. Variation between Pogostemon sp. accessions of the AGB of the UFS was observed for all qualitative morphologic characteristics. The descriptors color of stalks, veins, sepals and petals, and pilosity of leaves contributed to distinguish the accessions POG-001 and POG-006 from the others, which suggest that these two accessions are another species and not P. cablin. Significative differences between accessions were observed for the quantitative characteristics evaluated at each harvest, with exception for length of leaves (first harvest), essential oil yield (second harvest) and canopy diameter (third harvest). In the third chapter the chemical variation of the essential oil of 10 Pogostemon accessions of the AGB of the UFS, harvested in four seasons. Patchoulol was the major compound at the four harvests of all the P. cablin accessions. The principal compound of the accessions POG-001 and POG-006 was β-pinene. Two groups were detected by the multivariate analyses at the four harvests. Group 1 was formed by the accessions POG-001 and POG-006 (Pogostemon sp.), and group 2 was formed by the accessions of P. cablin (POG-002, POG-014, POG-015, POG-016, POG-017, POG-019, POG-021 and POG-022). In the fourth chapter the influence of storage time (0, 3, 7, 14 and 28 days) of dried leaves was analyzed on the essential oil content and chemical composition of two P. cablin accessions (POG-002 and POG-021) of the AGB of the UFS. Storage influenced significatively the essential oil content of accession POG-002. Patchoulol was the majority compound. Storage of dry leaves increased significatively the content of the compounds α-bulnesene (14 days) and germacrene A (3 and 7 days) at accession POG-021 and longicanfenilone (28 days), pogostol and patchoulol (3, 7, 14 and 28 days) at accession POG-002. However reduced significatively the content of the compounds cicloseichelene, β-cariofilene, α-guaiene, acifilene and α-bulnesene of the essential oil of the accession POG-002. 2009-06-25T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24445 Título: Comunidades de térmites em plantações de eucalipto no Litoral Norte da Bahia, Brasil Autor(es): Sales, Maria José Dias Abstract: Termites are insects best known for economic damage they cause, whether in urban areas, grassland or cropland, as sugar cane plantations and that the benefits they bring their activities to the ecosystems of which they belong. This study aimed to know the species of termites found in eucalyptus plantations of Copener Florestal Ltda, in order to contribute to knowledge about the termitofauna the region. The study was conducted in six areas recently harvested from Eucalyptus spp. of this company in december of 2005 through six transects following the protocol proposed by Jones and Eggleton (2000), which determines transects 100m long and 2m wide, divided into 20 plots (2 x 5m) contiguous. Each plot was sampled for 1 h / person and taken in each subdivision 12 soil samples from up to 10 cm deep, to collect termites. Were collected 35 species of termites belonging to 21 genera and two families, in a total of 826 samples in six areas, with five species occurred in all areas and 8 were exclusive. The family Termitidae represented 98.67% of samples and Rhinotermitidae only 1.33%. Ten species were dominant, all belonging to the family Termitidae. The dominant species belonging to the subfamily Apicotermitinae were: Anoplotermes sp.1, with a frequency of 15.3% and Anoplotermes sp.2, with 3.1%. In subfamily Termitinae were Amitermes amifer, with 14%; Microcerotermes sp. with 8.5%, and Termes sp. with 4% frequency. In subfamily Nasutitermitinae: Nasutitermes corniger, with 13.9% frequency; Diversitermes sp., whose frequency was 7.3%; Nasutitermes sp.1, with 5.1%; Velocitermes heteropterus with 4.4% and Constrictotermes cyphergaster, with 3.1% frequency. The functional group with the greatest number of species was consume humus, with 14 species and the number of samples of termites, wood feeders habit was superior to those of other functional groups (51.3%). The sampling effort was sufficient to collect most of the existing fauna of termites in their areas. The importance of this work stands out for its pioneering character on the north coast of Bahia and should be considered as a starting point for future studies of the termitofauna in eucalypt plantations in north coast of Bahia. 2010-03-25T00:00:00Z