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RESUMO -A Mimosa caesalpiniaefolia Benth. é uma espécie nativa da região Nordeste, que vem sendo progressivamente cultivada do Maranhão ao Rio de Janeiro. A planta apresenta grande potencial para arborização, cerca viva e produção de madeira. O presente trabalho teve como objetivo definir o tipo de substrato, a temperatura, o tempo médio e a frequência relativa de germinação, para auxiliar a condução de testes de germinação e vigor em sementes de Mimosa caesalpiniaefolia. Para tanto, realizou-se um experimento no Laboratório de Análise de Sementes do CCA-UFPB, em Areia-PB, em delineamento inteiramente casualizado com os tratamentos distribuídos em esquema fatorial 4x4, com os fatores temperaturas (20, 25, 30 o C constantes e 20-30 o C alternadas) e substratos (entre papel, sobre papel, entre areia e entre vermiculita), em quatro repetições de 25 sementes. Foram analisados os seguintes parâmetros: porcentagem de germinação e de plântulas anormais, primeira contagem da germinação e velocidade de germinação, tempo médio e frequência relativa de germinação, massa fresca e massa seca de plântulas. A temperatura de 25 o C mostrou-se mais adequada para a condução dos testes de germinação e vigor em sementes de Mimosa caesalpiniaefolia, independentemente do substrato utilizado. O substrato entre papel foi o mais apropriado para avaliação da qualidade fisiológica das sementes e a sincronização do processo germinativo foi maior no substrato entre papel, independentemente da temperatura empregada.Termos para indexação: Mimosa caesalpiniaefolia, substrato, temperatura, germinação, vigor. GERMINATION OF Mimosa caesalpiniaefolia Benth. SEEDS UNDER DIFFERENT SUBSTRATES AND TEMPERATURESABSTRACT -Mimosa caesalpiniaefolia Benth. is a native species from Northeast region, Brazil, which is cultivated progressively from Maranhão to Rio de Janeiro States. Its presents great potential for arborization, it surrounds it lives and wood production. The present work was realizated with Mimosa caesalpiniaefolia seeds with the objective to determine the substratum type, temperature, the middle time and the relative frequency of germination, for use as a pattern in the conduction of germination and vigor tests. It took place an experiment in the Laboratório de Análise de Sementes do CCA-UFPB, in Areia-PB, in completely randomized design with the treatments distributed in outline factorial 4x4, temperatures (constant of 20, 25 and 30 o C and alternate of 20-30 o C) and substrate (seeds cowered by paper shits, seeds on paper sheets, seeds into sand and seeds into vermiculite) in four replications of 25 seeds. The following parameters were analyzed: germination and of abnormal seedlings (%) first germination count, germination speed, medium time and relative frequency of germination, fresh matter and weight of dry matter of seedlings. According the results in all substrates the temperature of 25 o C was most adequate for conduction of germination and Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900, Jaboticabal-SP; e-mail: rcpaula@fc...

RESUMO:Myracrodruon urundeuva Fr. All. é uma espécie pertencente à família Anacardiaceae, cuja planta pode ser utilizada como medicinal, na indústria de curtimento de couro, na arborização de ruas e praças, produzindo madeira de grande resistência mecânica. Diante disso, o objetivo deste trabalho foi determinar as melhores condições e períodos de armazenamento para conservação da viabilidade e vigor das sementes de M. urundeuva. As embalagens utilizadas para acondicionamento das sementes foram sacos de papel Kraft, algodão e de polietileno transparente, bem como folhas de papel alumínio. Em seguida as sementes foram armazenadas em ambiente natural de laboratório (25 ± 2ºC), freezer (-20 ± 2ºC), câmara fria (8 ± 2ºC) e geladeira (6 ± 2ºC). Em intervalos pré-determinados (0, 30, 60, 90, 120, 150, 180, 210 e 240 dias) avaliouse o teor de água das sementes, porcentagem de emergência, índice de velocidade de emergência, comprimento e massa seca de plântulas. No ambiente de laboratório não houve conservação do vigor das sementes de M. urundeuva. A melhor condição para conservação de sementes de M. urundeuva foi obtida com o acondicionamento em sacos de papel Kraft, pano de algodão, plástico ou papel alumínio e manutenção em geladeira ou freezer, podendo também ser conservadas embaladas em papel ou alumínio, quando estocadas em câmara fria, por 240 dias. Alteração no vigor de sementes dessa espécie é primeiramente identificada pela redução da velocidade de emergência.Palavras-chave: aroeira-do-sertão, emergência, vigor, conservação, planta medicinal ABSTRACT: Storage of Myracrodruon urundeuva Fr. All. seeds in different packaging and environments. Myracrodruon urundeuva Fr. All. is a species belonging to the Anacardiaceae family, which can be utilized as a medicinal plant, or in the leather tanning industry, urban afforestation, and the production of wood with great mechanic resistance. The objective of this study was to determine the best conditions and storage periods for preserving the viability and vigor of M. urundeuva. Seeds conditioned in bags of Kraft paper, cotton, polyethylene or aluminum foil of mesh polyethylene were stored at room temperature (25 ± 2ºC), freezer (-20 ± 2ºC), cold (8 ± 2ºC) and refrigerator (6 ± 2ºC). At 30, 60, 90, 120, 150, 180, 210 and 240 days they were evaluated for seed moisture content, percentage of emergence, emergence speed index (ESI), seedling length and seedling dry matter. In the natural environment of the laboratory, there was no conservation of seed vigor M. urundeuva. The best M. urundeuva seed conservation condition was obtained with bags of Kraft paper, cotton, polyethylene or aluminum foil of mesh polyethylene in the refrigerator or freezer. M. urundeuva seeds can also be kept in paper bags or aluminum foil when stored in a refrigerated chamber, for 240 days. Seed vigor change in this species is initially identified by decrease in the speed emergence.

RESUMO:Schinus terebinthifolius Raddi (Anacardiaceae), conhecida como aroeira-vermelha é uma espécie nativa do Brasil, perenifólia e pioneira, sendo muito utilizada para combater diversas doenças, pois apresenta, entre outras, propriedades anti-inflamatórias e cicatrizantes. O objetivo desta pesquisa foi realizar um estudo morfoanatômico do caule e da folha de S. terebinthifolius, descrevendo a organização dos tecidos e suas possíveis variações. As análises macro e microscópicas foram realizadas com material selecionado de partes vegetativas de um espécime localizado na cidade de Campina Grande -PB. A aroeira-vermelha é um vegetal arbóreo e dióico, que apresenta caule cilíndrico e simpodial, com casca rugosa e estriada. A folha é perene, alterna, coriácea e composta. As análises microscópicas evidenciaram epiderme caulinar e foliar uniestratificadas, exceto na face adaxial da folha, que é bisseriada. No caule e no pecíolo são visualizados muitos tricomas tectores unicelulares, curtos, cônicos e agudos no ápice. Encontram-se canais secretores arredondados e bem desenvolvidos na região do floema em todos os órgãos estudados, bem como cutícula revestindo as células epidérmicas e grande quantidade de drusas de oxalato de cálcio. Os feixes vasculares são circundados por células esclerenquimáticas e apresentam o floema seguido por xilema helicoidal bem desenvolvido. No caule, pecíolo e nervura central da folha, o xilema é interno e o floema, externo. A aroeira-vermelha apresenta alguns aspectos estruturais característicos de plantas xerófilas, como camada múltipla da epiderme da face adaxial foliar, que protegem o mesofilo de excessiva dessecação; presença de cutícula espessa e grande quantidade de pêlos e de estômatos; além de sistema vascular bem desenvolvido, com abundância de esclerênquima, dando sustentação ao feixe. Palavras-chave:Schinus terebinthifolius, Anacardiaceae, canais secretores, caule, folha, morfoanatomia, drusas de oxalato de cálcio. ABSTRACT: Pharmacobotanical study of the aerial parts of Brazilian pepper (Schinus terebinthifolius Raddi).Schinus terebinthifolius Raddi (Anacardiaceae), popularly known as Brazilian pepper, is an evergreen, pioneer and indigenous plant from Brazil, and it is used to combat various diseases, as it presents anti-inflammatory and wound healing properties. The aim of this research was to study the morpho-anatomical features of the stem and leaf of S. terebinthifolius, describing the organization of the tissues and their variations. The macroscopic and microscopic analyses were performed with material selected from vegetative parts of a specimen collected in the city of Campina Grande -state of Paraíba, Brazil. The Brazilian pepper is a dioecious plant with cylindrical and sympodial stem and rough and striated bark. The leaves are evergreen, alternate, leathery and compound. The microscopic analysis showed uniseriate epidermis in the stem and leaf, except in the adaxial leaf, which is biseriate. In the stem and petiole, many unicellular, short, conical tector trichomes wit...

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ABSTRACT. We investigated the karyotypes of 13 species of six sections of the genus Inga (Leguminosae-Mimosoideae) from Brazil. We used conventional Giemsa staining to identify numerical chromosomal variations and looked for karyotypic evolutionary patterns. The karyotypes generally had small chromosomes, varying from metacentric to submetacentric, with a basic number x = 13. Nine of the species showed 2n = 2x = 26 (I. thibaudiana, I. cayennensis, I. ingoides, I. edulis, I. vera, I. subnuda, I. striata, I. bollandii, and Inga sp), while 2n = 4x = 52 was seen in a population of Inga cylindrical and of I. capitata, and in five populations of I. laurina. Additionally, 2n = 8x = 104 was observed in a population of I. cayennensis. Eight of these counts were new, while the counts of 2n = 52 for I. laurina and 2n = 26 for I. marginata, I. vera, I. subnuda, and I. edulis confirmed previous studies. We did not find cytological stability among the sections studied, with occurrence of significant intra-and inter-specific numerical variations. We conclude that polyploidy has played a significant role in karyotypic evolution in this group and that it occurred independently in several sections of the genus.

ABSTRACT. Poincianella pyramidalis (Tul.) L.P. Queiroz is an endemic Caatinga (Brazilian savannah biome) species that has been exploited for different purposes, although information is necessary about still existing natural populations. The objective of this study was to evaluate the genetic diversity among 20 P. pyramidalis individuals occurring in a population localized in the Caatinga biome of Paraíba State, aiming at seed collection, using RAPD markers. For the DNA extraction, young shoots of the individuals were used, and amplification was carried out using 20 primers. The obtained markers were converted to a binary matrix, from which a genetic dissimilarity matrix was built using the arithmetic complement of Jaccard's coefficient, and the dendrogram was built by the UPGMA analysis. No amplified fragment was monomorphic, resulting in 100% polymorphism of the analyzed population. The mean genetic diversity among the matrices was 63.28%, ranging from 30.9 to 97.7%. Individuals 09 and 17 showed relevant genetic proximity, and thus planting their seedlings at close sites would not be indicated. The population evaluated in this study showed high genetic diversity, originating twelve groups from the UPGMA hierarchical cluster analysis. Based on the results, individuals 09 and 17 can provide plant material for the evaluation of the physiological performance of P. pyramidalis seeds, and the set of individuals of this population has a high genetic diversity that characterizes them as adequate matrices for projects of restoration and conservation of the seed species.

Snap-bean seeds production accordingly to levels and sources of organic matter.With the objective of evaluating sources and levels of organic matter on the production of snap-bean seeds, cv. Macarrão Trepador, there was set up an experiment in the Federal University of Paraíba, Brasil, from April to September/1998. The experimental design was of randomized blocks, in the factorial scheme 4 x 5, testing four sources of organic matter (cattle, goat and chicken manure and earthworm humus) in five levels (0, 10, 20, 30 and 40 t/ha of cattle and goat manure and 0, 5, 10, 15 and 20 t/ha of earthworm humus), in four replications. The maximum production of seeds was obtained with the levels of 27,66 t/ha of cattle manure (3,555.10 kg), 20.85 t/ha of goat manure (3,259.56 kg) and 9.87 t/ha of chicken manure (2,919.00 kg/ha) and earthworm compost (3,270 kg/ha). The most economic level of cattle manure was of 25.57 t/ha, with a revenue of 1,442.55 kg of seeds/ha (R$ 4,616.16), 19.11 t/ha of goat manure with a revenue of 1,164 kg of seeds/ha (R$ 3,724.80) and 5.17 t/ha of chicken manure with a revenue of 177.86 kg of seeds/ha (R$ 569.15). Under the point of view of seeds production, the application of earthworm compost propitiated productions above the national average, but its use in the production of snap-bean seeds is not economically viable. The economical analysis indicated the cattle manure as the most viable fertilization source to produce snap-bean seeds.