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Propaga??o da goiabeira por miniestaquia
Marinho, Cláudia Sales;Milhem, Leonardo Muniz Aziz;Altoé, Jalille Amim;Barroso, Deborah Guerra;Pommer, Celso Valdevino;
Revista Brasileira de Fruticultura , 2009, DOI: 10.1590/S0100-29452009000200042
Abstract: minicutting is a method of vegetative propagation widely used in the formation of clonal minigarden of eucalyptus. this technique presents potential to be used for fast multiplication of new genotypes of guava, giving support to breeding work and, also, as a more appropriate technology for use in certified propagation programs. this study was carried out to evaluate the viability of the minicutting technique as a method of guava propagation (psidium guajava l.). seedlings of guava, 118 days after sowing, were detopped and from this blunt 210 minicuttings were prepared, 13.5 mm to 37.9 mm long, and placed in commercial substrata to rooting in intermittent mist chamber. fourty days after, 76% of the minicuttings have rooted and emitted aerial part. the ministumps of guava presented average of 1.52 sprouts per blunted seedling. minicuttings of regrowth were prepared from the seedlings, 39 days after blunt. thirty-five days after been planted, these minicuttings, with average length of 13.56 mm, presented 100% of rooting. results demonstrated the viability of minicutting for fast multiplication of guava, which can give support to breeding works in preliminary selections of interesting genotypes.
Propaga o vegetativa de cedro-rosa por miniestaquia
Xavier Aloisio,Santos Glêison Augusto dos,Wendling Ivar,Oliveira Marcelo Lelis de
Revista árvore , 2003,
Abstract: O objetivo deste trabalho foi avaliar a técnica de miniestaquia como método de propaga o vegetativa de cedro-rosa (Cedrela fissilis), quanto à produ o e sobrevivência das minicepas nas sucessivas coletas e quanto ao porcentual de enraizamento e do crescimento em altura e diametro do colo das miniestacas. As minicepas foram obtidas a partir de mudas de sementes de cedro-rosa, das quais promoveram-se as coletas sucessivas de miniestacas, sendo essas submetidas a diferentes dosagens do regulador de crescimento AIB para enraizamento. Os resultados demonstraram a eficiência da técnica na propaga o vegetativa desta espécie, atingindo-se até 79% de sobrevivência aos 120 dias de idade das mudas, devendo-se destacar que a n o-aplica o do AIB proporcionou melhores resultados. Em termos gerais, a miniestaquia de cedro-rosa, a partir de material de origem seminal, é tecnicamente viável, tornando-se uma alternativa para produ o de mudas dessa espécie durante todo o ano, principalmente nas situa es em que a semente é insumo limitante.
Qualidade fisiológica de sementes de ara?azeiro durante o armazenamento
Cisneiros, Roberta A.;Matos, Valderez P.;Lemos, Margarida A.;Reis, Odemar V. dos;Queiroz, Rosilda de M.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2003, DOI: 10.1590/S1415-43662003000300018
Abstract: the present work had the objective of evaluating different storage environments and packings in relation to the efficiency in the maintenance of the quality of the seeds of ?ara?á? (psidium guineense swartz), during 180 days. the seeds were obtained from fully ripened recently-harvested fruits of eight accesses of the active germoplasm bank of the ?ara?azeiro? located in the experimental station of agricultural research organization of the state of pernambuco at itapirema, goiana-pe, and denominated as ipa 4, ipa 6, ipa 7, ipa 9, ipa 10, ipa 11, ipa 15 and ipa 16. the experiment was represented by the combinations of the following factors: seeds of 8 accesses of the ?ara?azeiro?, conditioned in the kraft paper bags and glass, stored under environmental conditions of recife-pe, and in a freezer. the physiological quality of the seeds was evaluated at the beginning and at every 60 days of storage, through the germination and vigor (first count germination and index of germination speed). the results showed that the physiological quality of the seeds was reduced with significant losses in the germination and vigor during the storage period. the glass packing provided larger efficiency in the conservation of the physiological quality of the seeds, under conditions of high relative humidity inside the freezer, which provoked larger deterioration of the seeds conditioned in kraft paper bags. among the environment of storage tested, the most efficient in the conservation of the seeds of the ?ara?azeiro? was the storage under normal environmental condition for both packings. the accesses ipa 4 and ipa 6 presented the highest germination indexes and vigor.
Miniestaquia aplicada a espécies florestais.
Aurea Portes Ferriani,Katia Christina Zuffellato-Ribas,,Ivar Wendling
Agro@mbiente On-line , 2010,
Abstract: A miniestaquia é uma técnica recente de propaga o vegetativa cujo princípio é o aproveitamento do potencial juvenil dos propágulos para indu o do enraizamento. Tendo em vista a necessidade de produ o de mudas em larga escala para diversos fins, pode representar uma alternativa promissora para espécies lenhosas que manifestem dificuldade de enraizamento do material adulto ou cujas sementes representem fator limitante. Nesse sentido, este trabalho apresenta procedimentos e resultados de pesquisas desenvolvidas com gêneros amplamente utilizados na silvicultura clonal, como Eucalyptus e Pinus, além de outras espécies florestais com potencial para plantios comerciais e de recupera o de ecossistemas. Assim, buscou-se analisar as condi es de implanta o e manejo que contribuem para o desenvolvimento satisfatório das minicepas e miniestacas como incremento do processo. A introdu o da miniestaquia apresenta vantagens relacionadas à redu o da área de produ o, diminui o do período de enraizamento e aclimata o, além da redu o do uso de reguladores vegetais para indu o do enraizamento. = Minicutting is a recent plant propagation technique using the juvenile potential from propagules to rooting induction. Due to the necessity of plant production in large scale for different purposes, this method can present a promising alternative for woody species whose seeds are the limiting factor or express difficult to root the mature material. This study presents procedures and results of evaluations done with genus of plants frequently used in clonal forestry, such as Eucalyptusand Pinus, and other species with potential to new crops development in environmental restoration.Consequently,we analyzed the established conditions that contribute satisfactorily to the development of ministumps and minicuttings in an attempt to improve the process. The introduction of minicutting technique presents advantage related to the reduction of the production area, reduction in rooting period and acclimatization, besides the decrease in use of regulator of root induction.
Efeito do tipo de ramo e do regime de luz fornecido à planta matriz no estabelecimento in vitro de ara?azeiro cv. "Irapu?"
Souza, Joseane Almeida de;Schuch, Márcia Wulff;Silva, Luciane Couto da;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000600041
Abstract: the objective of this research was to evaluate the effect of the light regimen submitted to the donors-plant and the branch type used in the in vitro establishment of the ara?azeiro, cultivar irapu?. the culture medium used was ms added of 5μm of bap. nodal segments removed from herbaceous and semi-woody branches containing one bud of plants maintained in the darkness during 15 days and plants maintained in light were inoculated in test tube containing 10ml of culture medium. after inoculation, the explants were subjected to the dark room for seven days at temperature of 25 ± 2°c and then transferred to a growth room in a 16 - hour photoperiod, 27μmolm-2s-1 radiation and at 25 ± 2°c. at the 7th, 14th and 21st days of cultivation, the fungical and bacterial contamination and explant oxidation percentages were evaluated. at the 30th and 45th days of cultivation, besides variables previously analyzed, the survival rate and establishment of explants were evaluated. in coclusion, herbaceous branches presente lower fungical and bacterial contamination rates and higher survival rates of explants when donors-plants were maintained in the dark.
Estaquia e miniestaquia de espécies florestais lenhosas do Brasil Cutting and mini-cutting techniques of Brazilian wood species
Poliana Coqueiro Dias,Leandro Silva de Oliveira,Aloisio Xavier,Ivar Wendling
Pesquisa Florestal Brasileira , 2012,
Abstract: A propaga o vegetativa por estaquia e miniestaquia é uma alternativa para supera o das dificuldades na propaga o via sementes e de clonagem de genótipos superiores de espécies florestais nativas, possibilitando assim sua utiliza o para fins comerciais, bem como auxiliar a conserva o de recursos genéticos florestais. O Brasil apresenta uma grande diversidade de espécies lenhosas. No entanto, os trabalhos com estaquia e miniestaquia de espécies lenhosas nativas ainda s o reduzidos, sendo necessários estudos com enfoque no enraizamento adventício de estacas. Neste ambito, o presente trabalho teve por objetivo realizar um levantamento dos estudos realizados na propaga o vegetativa via estaquia e miniestaquia em espécies florestais lenhosas nativas do Brasil, evidenciando as técnicas utilizadas e os fatores associados à propaga o destas espécies. O desenvolvimento e domínio da propaga o vegetativa destas espécies contribuir o para o avan o na silvicultura de importantes representantes do setor de produtos madeireiros e n o-madeireiros como também para a recupera o de áreas degradadas e de preserva o ambiental. The vegetative propagation by cutting and mini-cutting techniques is an alternative to overcoming difficulties of propagation through seeds and cloning of superior genotypes of native wood species. It is also useful to the conservation of forest genetic resources. Brazil has a great diversity of wood species. However, researches with cutting and mini-cutting techniques of wood native species are still scarce. Additional studies concerning cutting rooting are necessary. In this context, this paper presents a review of researches conducted with vegetative propagation via cutting and mini-cutting techniques with Brazilian wood native species, showing the procedures and the characteristics of the propagation of these species. The development and domain of propagation of wood native species will contribute to important achievements regarding species silviculture to the forest sector of timber and non-timber products, as well as, to the restoration of degraded forests and environmental protection.
Multiplica??o de cultivares de goiabeira por miniestaquia
Altoé, Jalille Amim;Marinho, Cláudia Sales;Terra, Maria Isabela da Costa;Carvalho, Almy Júnior Cordeiro de;
Bragantia , 2011, DOI: 10.1590/S0006-87052011000400011
Abstract: the use of the minicutting technique for multiplying guava tree cultivars might allow the establishment of new protocols to obtain plantlets grown under better environmental control. this study was carried out to evaluate the minicutting technique for multiplying guava tree cultivars. three experiments were carried out in randomized block design, using four cultivars (paluma, pedro sato, cortibel 1 and cortibel 6) and four replicates. in these experiments, the lateral shoot emission of ministumps after successive harvests, the rooting capacity of cuttings in different seasons and the growth of plantlets were evaluated. the highest percentage of cutting rooting was observed in december. by that time, the average rooting of cultivars paluma, pedro sato, cortibel 1 and cortibel 6 was 92%, 75%, 75% and 79%, respectively. however, the rooting percentage of 'cortibel 1' minicuttings was most influenced by the month of the year, ranging from 16.7% and in november to 45.8% in june. after 138 days from cutting establishment, the plantlet heights were within the recommended technical standards for transplanting to the field, between 45 and 50 cm. based on these results, it was concluded that the minicutting technique is feasible for multiplying these cultivars.
Miniestaquia seriada no rejuvenescimento de clones de Eucalyptus  [cached]
Wendling Ivar,Xavier Aloisio
Pesquisa Agropecuária Brasileira , 2003,
Abstract: O objetivo deste trabalho foi avaliar a eficiência da técnica de miniestaquia seriada em quatro clones de Eucalyptus grandis, quanto à sobrevivência, ao enraizamento e ao crescimento em altura e diametro de colo das mudas. Foram realizados sete subcultivos pela miniestaquia seriada, por enraizamento sucessivo de brota es de minicepas, em casa de vegeta o durante 25 dias, seguido de aclimata o por dez dias em casa de sombra e avalia o final das mudas aos 50 dias de idade, em pleno sol. A miniestaquia seriada mostrou efeito positivo, principalmente em rela o aos clones que apresentaram menor potencial de enraizamento.
Enraizamento de miniestaca caulinar e foliar na propaga o vegetativa de cedro-rosa (Cedrela fissilis Vell.)
Xavier Aloisio,Santos Glêison Augusto dos,Oliveira Marcelo Lelis de
Revista árvore , 2003,
Abstract: No presente trabalho objetivou-se avaliar o enraizamento de cinco diferentes tipos de miniestaca (caulinar, caulinar apical, caulinar intermediária, caulinar apical desfolhada e foliar), na propaga o vegetativa de cedro-rosa (Cedrela fissilis) por miniestaquia, a partir de material seminal. Os resultados obtidos quanto ao enraizamento indicaram o melhor desempenho da miniestaca caulinar, com 84% de sobrevivência das mudas aos 90 dias de idade, demonstrando o potencial da miniestaquia como alternativa na produ o de mudas de cedro-rosa.
Propaga??o clonal de guanandi (Calophyllum brasiliense) por miniestaquia
da Silva,Rogério Luiz; de Oliveira,Mila Liparize; Marco Ant?nio,Monte; Xavier,Aloisio;
Agronomía Costarricense , 2010,
Abstract: guanandi (calophyllum brasiliense) clonal propagation through minicuttings. the goal of this research was to determine guanandi (calophyllum brasiliense) clonal propagation efficiency of hisforesty species through minicutting technique. a miniclonal garden was first established in sand beds, where new sprouts were produced for their use as minicuttings. two experiments were performed in order to refine propagation protocols. the first experiment assessed the performance of 2 different types of minicuttings (apical and intermediate within the sprout) exposed to three iba dosages (0, 2000, 4000, and 8000 mg.l-1). in the second experiment, minicuttings were sown in 3 different substrates (vermiculite, burned rice husk and decomposed pine-bark). rooting percentages did not vary among treatments in the first experiment. in the second experiment, a greenhouse-permanency time reduction, under vermiculite substrate condition, was registered. as a general conclusion, the minicutting technique was an efficient strategy for guanandi clonal propagation.
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