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| Registros recuperados: 101 | |
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| CHOUDHURY, M. M.. |
| As sementes, estacas, bulbos, tubérculos, etc., são órgãos de propagação vegetal e eficientes veículos de disseminação de fitopatógenos em campos agrícolas. Como as sementes contribuem com aproximadamente 90% para a propagação das culturas, muitos fungos, bactérias, virus e alguns fitonematóides podem apresentar-se associados as mesmas, causando severos danos as culturas. Estes fitopatógenos, em condições favoraveis, sobrevivem nas sementes de um ano para outro; ou por período mais longo durante o armazenamento. São apresentados no trabalho os danos causados por sementes infectadas ou contaminadas, os meios de disseminação de fitopatógenos pelas sementes e como evitar a introdução de doenças na região. Com relação a colheita, dois aspectos básicos devem... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Propagação; Seed; Diseases; Propagation; Disease.; Planta; Doença; Semente.. |
| Ano: 1982 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131789 |
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| Lurton, Xavier. |
| Sound waves are the only practical means of remote investigation and transmission in seawater. All along the XXth century, underwater acoustics became one of the major technologies used for exploration and exploitation of the oceans for scientific, industrial, or military purposes. It is nowadays able to play, inside the oceans, the roles devoted to radio and radar in atmosphere and space, and is widely employed in the fields of navigation, fisheries, defence, oceanography and ocean engineering. This book presents, in a clear and concise way, the basic physical phenomena governing underwater acoustical waves, the general features of sonar systems, and an overview of their applications. |
| Tipo: Text |
Palavras-chave: Acoustique sous-marine; Propagation; Traitement du signal; Sonar; Sondeur; Underwater acoustics; Propagation; Signal processing; Sonar; Echosounder. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00017/12790/9731.pdf |
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| COSTA,BÁRBARA N.S.; COSTA,IRTON J.S.; SOUZA,GENAINA A. DE; SANTOS,DALILHIA N. DOS; SILVEIRA,FLÁVIA A. DA; MELO,EVALDO T. DE; MARTINS,ADALVAN D.; PASQUAL,MOACIR; SETOTAW,TESFAHUN A.; RODRIGUES,FILIPE A.. |
| Abstract The jelly palm plant [Butia capitata (Martius) Beccari] is a native palm of the Cerrado biome used for many purposes in northern Minas Gerais State, Brazil. Dormancy is common in palm seeds, resulting in slow and uneven germination that may take years to complete. Modification in the growth pattern, anatomical parameters, physiological and biochemical characteristics of the plant can be verified due to changes in the light spectrum transmitted through colored shade nets used. Therefore, the objective of this study is to evaluate the effect of colored shade nets on the leaf and root anatomy of the jelly palm plant. The experiment was performed in a completely randomized design, with five treatments, ten replicates and eight plants per replicate,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Environment; Palms; Propagation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703615 |
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| Sasamori,Márcio Hisayuki; Endres Júnior,Delio; Droste,Annette. |
| ABSTRACTCattleya intermediais an Atlantic Forest species endemic to Brazil that is classed as vulnerable on the list of threatened species. In this study, C. intermedia plantlets were micropropagated in an asymbiotic culture and the influence of different concentrations of sucrose (15, 30, 45 and 60 g L-1, plus a zero sucrose medium) and macronutrient salts (complete Murashige and Skoog (MS) medium and half MS medium (with half-strength macronutrients)) on survival and development of the plantlets was evaluated. In all treatments 100% plantlet survival was achieved. The integrated analysis of height of aerial part, number of leaves per plantlet, fresh mass, number of roots per plantlet and length of the longest root showed that the plantlets exhibited... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Carbohydrate; Conservation; In vitro culture; Orchids; Propagation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300292 |
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| Morais-Lino,Lucymeire Souza; Santos-Serejo,Janay Almeida dos; Silva,Sebastião de Oliveira e; Santana,José Raniere Ferreira de; Kobayashi,Adilson Kenji. |
| The objective of this study was to establish cell suspension culture and plant regeneration via somatic embryogenesis of a Brazilian plantain, cultivar Terra Maranhão, AAB. Immature male flowers were used as explant source for generating highly embryogenic cultures 45 days after inoculation, which were used for establishment of cell suspension culture and multiplication of secondary somatic embryos. Five semisolid culture media were tested for differentiation, maturation, somatic embryos germination and for plant regeneration. An average of 558 plants per one milliliter of 5% SCV (settled cell volume) were regenerated in the MS medium, with 11.4 µM indolacetic acid and 2.2 µM 6-benzylaminopurine. Regenerated plants showed a normal development, and no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa; Culture media; Propagation; Somatic embryogenesis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001000010 |
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| Cocco,Carine; Andriolo,Jerônimo Luiz; Cardoso,Francieli Lima; Erpen,Ligia; Schmitt,Odair José. |
| Strawberry (Fragaria x ananassa D.) yield is affected by vigor of transplants. Those young and vigorous at planting lead to plants reaching higher vegetative growth and fruit yield than weak or old ones. This study aimed at determining plant growth, development, and fruit yield of the strawberry plant from bare root and plug transplants with different crown diameters. Bare root transplants were produced by rooting stolons and plug transplants from runner tips collected and rooted in a substrate growing bed. Three classes of crown diameters were compared in a 2 × 3 factorial and randomized block experimental design, with four replications, 16 plants per plot and a density of 6.6 plants m-2. For bare root transplants, crown diameters were between 3.0 and 5.0... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria x ananassa Duch; Propagation; Plug plants; Bare root transplants; Transplants vigor. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400015 |
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| Lima,Cristina B; Boaventura,Ana C; Gomes,Marli M. |
| We aimed to establish the period of time required for seedlings formation, as well as to evaluate the effect of substrates and plant growth regulators in cuttings of L. alba. Three experiments were performed, with statistical designs chosen according to each test objectives. Rooting (%), shoot height (cm), longest root length (cm), leaves number, fresh and dry matter masses (g), were analyzed. The absolute rate of shoot and root system growth, together with the relationship between dry mass of roots and shoots were efficient in predicting the period of greatest speed and accumulation of organic matter in plants. The plant growth regulators favored the vegetative performance of seedlings, with better development 30 days after the cuttings containing mineral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lippia alba; Propagation; IBA; Rooting.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000200015 |
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| Picio,Miriane Dal; Andriolo,Jerônimo Luiz; Cardoso,Francieli Lima; Lerner,Maíne Alessandra; Souza,Jéssica Maronez de. |
| The objective of this work was to determine the sink-source relationships and their effects on the number and growth of runner tips of 'Camino Real' strawberry stock plants. Three types of sources were evaluated: one defoliation at 96 days after planting (DAP), two defoliations at 50 and 96 DAP, and mother plants without defoliation. Four types of sink were accessed: runner tips collected weekly and monthly, four stolons with rooted runner tips in pots, and four freely-grown stolons. A completely randomized experimental design was used in a split-plot arrangement, with four replicates. The source types were placed in the plots, and sink types in the subplots. The number of runner tips, the crown diameter, and the dry matter mass were determined. Number and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria xananassa; Plug plants; Propagation; Sink strength; Source-sink relationship.. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000700515 |
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| Cocco,Carine; Andriolo,Jerônimo Luiz; Erpen,Lígia; Cardoso,Francieli Lima; Casagrande,Gustavo Spreckelsen. |
| The objective of this work was to evaluate the influence of crown diameter and growing period of runner tips in 128 cell-trays on growth and yield of strawberry in the field. Treatments consisted of three classes of runner tip crown diameters, between 2.0 to 3.9 mm; 4.0 to 5.5 mm and 5.6 to 7.0 mm, respectively, and four growing periods in trays, 24; 39; 54 and 69 days, respectively. Higher shoot dry mass of transplants at planting and earlier yield of plants in the field were obtained in transplants grown for 69 days in trays. Larger runner tips lead to more vigorous transplants at planting and plants with higher vegetative growth in the field, with minor impact on yield. Increasing the growing time of runner tips in trays improved early fruit yield and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria x ananassa; Early yield; Propagation; Plug plants. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000700014 |
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| Registros recuperados: 101 | |
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