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| Registros recuperados: 92 | |
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| Ribeiro, Maitê dos Santos; Steffens, Cristiano André; Oliveira, Luciana Magda; Garcia, Cristhyane; Pikart, Tiago Georg; Souza, Gabriely Koerich. |
| Este trabalho objetivou avaliar a eficiência de tratamentos pré-germinativos na promoção da germinação e crescimento inicial de plântulas de palmiteiro. Os tratamentos avaliados foram: controle, imersão em solução de GA3, exposição ao etileno, imersão em água, imersão em H2SO4, escarificação mecânica, estratificação por 30 dias a 10°C, e escarificação seguida de estratificação. A imersão de sementes em solução de ácido giberélico (GA3; 2000 µL L-1 durante 24 h) ou sua exposição ao etileno (1000 µL L-1 durante 24 h) são eficientes para a promoção da emergência e crescimento inicial de plântulas de palmiteiro. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais; Silvicultura; Tecnologia de Sementes Florestais Euterpe edulis; Dormência; Etileno; Ácido giberélico Euterpe edulis; Dormancy; Ethylene; Gibberellic acid. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/663 |
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| Gavazza,Melícia Ingredi Araújo; Bassoi,Manoel Carlos; Carvalho,Tereza Cristina de; Bespalhok Filho,João Carlos; Panobianco,Maristela. |
| The objective of this work was to test methods for pre-harvest sprouting assessment in wheat cultivars. Fourteen wheat cultivars were grown in Londrina and Ponta Grossa municipalities, Paraná state, Brazil. They were sampled at 10 and 17 days after physiological maturity and evaluated using the methods of germination by rainfall simulation (in a greenhouse), in-ear grain sprouting, and grains removed from the ears. The in-ear grain sprouting method allowed the differentiation of cultivars, but showed different resistance levels from the available description of cultivars. The sprouting of grain removed from the ears did not allow a reliable distinction of data on germination in any harvest date or location. The method of rainfall simulation is the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Dormancy; Grain quality; Rainfall simulation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000700008 |
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| Bassoi,Manoel Carlos; Flintham,John; Riede,Carlos Roberto. |
| The objective of this work was to evaluate the possibility of obtaining recombinant inbred wheat lines more resistant to preharvest sprouting, independently of colour genes, in three red-grained Brazilian wheat populations. The results showed statistical significance among lines within all populations, which presented a normal distribution and transgressive segregation for preharvest sprouting. The normal distribution of the lines from all red-grained populations suggests that sprouting, excluding the genes expressing seed coat pigmentation, is, probably, controlled by many genes. These findings also indicate that it may be possible to improve resistance to preharvest sprouting, independently of the colour genes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Dormancy; Grain colour; Genes; Genetic variation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000400006 |
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| Bassoi,Manoel Carlos; Flintham,John. |
| Since red alleles (R) of the genes that control grain colour are important for the improvement of preharvest sprouting resistance in wheat and there are three independently inherited loci, on chromosomes 3A, 3B and 3D of hexaploid wheat, it is possible to vary the dosage of dominant alleles in a breeding program. The objective of this work was to evaluate the dosage effect of R genes on preharvest sprouting, in a single seed descent population, named TRL, derived from the cross between Timgalen, white-grained wheat, and RL 4137, red-grained wheat. The study was carried out using sprouting data in ripe ears obtained under artificial conditions in a rainfall simulator over three years. According to the results there is a significant effect on preharvest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Gene; Allele; Dormancy; Dosage effect. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005001000006 |
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| VARGAS,A.A.M.; AGOSTINETTO,D.; ZANDONÁ,R.R.; FRAGA,D.S.; AVILA NETO,R.C.. |
| ABSTRACT: Horseweed (Conyza spp.) is considered as one of the major weeds occurring in the agricultural areas of South America, especially in Brazil. This species stands out from the other weeds due to characteristics such as large seed production, continued seed production, dispersion over long distances and resistance to 5-enolpyruvoylshikimate 3-phosphate (EPSP) and acetolactate synthase (ALS) inhibiting herbicides, features that increase their management. Therefore, this study aimed at determining the physiological quality and longevity of horseweed seeds over 12 months. The experiment was established under field conditions, using a randomized block design with four replications. Fifty horseweed seeds were distributed into 50 g of dry soil, placed in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza spp.; Survival; Dormancy; Germination; Viability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100249 |
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| Ikram,R.M.; Tanveer,A.; Ata,Z.; Saqib,M.. |
| The aim of this study was to examine the dormancy behavior of Euphorbia dracunculoides and Astragalus spp., weeds of arid chickpea. The dormancy breaking treatments were: Gibberalic acid (GA3) and Thiourea each at 50, 100, 150, 200, 250, and 300 ppm and Potassium nitrate (KNO3) at 5,000, 10,000, 15,000, 20,000, 25,000, and 30,000 ppm (24 h soaking). Germination (G) percentage and germination energy (GE) of E. dracunculoides was maximum (89 and 22, respectively) at 250 ppm concentration of GA3 and 81.50 and 11.50 at 15000 ppm concentration of KNO3. Thiourea at 250 and 300 ppm resulted in maximum G percentage (51) and GE (25.50) of E. dracunculoides, whereas the G percentage and GE of Astragalus spp. were maximum (28 and 19, respectively) at the lowest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GA3; KNO3; Thiourea; Dormancy; E. dracunculoides; Astragalus spp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400009 |
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| Krenchinski,F.H.; Albrecht,A.J.P.; Albrecht,L.P.; Villetti,H.L.; Orso,G.; Barroso,A.A.M.; Victoria Filho,R.. |
| Light, temperature and dormancy are factors that influence the germination of seeds and are strictly linked to the emergence of weeds. The objective of this work was to assess the germination of Sorghum arundinaceum and Sorghum halepense subjected to different conditions of temperature and luminosity, as well as assessing seed dormancy breaking mechanisms. For this, two experiments were conducted, both arranged in a completely randomized design. Experiment 1 was installed in a 2 x 5 double factorial design. The first factor was the absence or presence of light for 12 hours, and the other was composed of five constant temperatures: 15, 20, 30, 40 and 45 oC. In experiment 2, the efficiency of nine treatments used for breaking dormancy of seeds was assessed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Johnsongrass; False johnsongrass; Dormancy; Seeds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200223 |
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| SOUZA,FRANCISCO H. DÜBBERN DE; MARCOS-FILHO,JÚLIO. |
| The seed coat is one of the main determinants of seed germination, vigor and longevity potentials. It is also intimately associated with temporal and spatial dispersion of seed germination in a large number of plant species. The understanding of its properties and characteristics may explain, anticipate or even allow the modification of seed performance under certain environmental conditions. There is a growing volume of evidence associating seed coat characteristics to specific seed problems. For example, susceptibility to mechanical damage is related to lignin content of the seed coat, while seed longevity and tolerance to field weathering depends on seed coat integrity. Seed performance in many legumes has been associated with certain seed coat... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germination; Vigor; Imbibition; Dormancy. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000400002 |
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| Mendes-Rodrigues,Clesnan; Araújo,Francielle Paulina de; Barbosa-Souza,Cláudia; Barbosa-Souza,Valéria; Ranal,Marli A.; Santana,Denise Garcia de; Oliveira,Paulo Eugênio. |
| Species with mostly asexual reproduction are interesting subjects for germination studies since variation would be more easily linked to environmental factors. Miconia ferruginata DC. is an apomictic treelet in Brazilian cerrado areas on rocky outcrops. Germination of seeds collected from individuals occurring in the Serra de Caldas Novas State Park, Goiás, was studied in three experiments under controlled conditions. Germination characteristics differed among individuals and were correlated with altitude and soil Al content. Seeds from plants growing at lower altitudes, with lower soil aluminium content, presented malformed seeds with absence of embryo which rendered lower, but better synchronized germination. The nested analysis showed that from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altitudinal gradient; Campo rupestre; Cerrado; Dormancy; Tropical savanna. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000100009 |
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| CRUZ,ENIEL DAVID; MARTINS,FÁDUA DE OLIVEIRA; CARVALHO,JOSÉ EDMAR URANO DE. |
| Hymenaea intermedia Ducke é uma Leguminosae-Caesalpinioideae de grande porte, encontrada em áreas de floresta nos Estados do Pará e Amazonas. O trabalho objetivou estudar as características biométricas de frutos e sementes de H. intermedia e o efeito da escarificação na germinação das sementes. Determinou-se o comprimento, a largura e a espessura de frutos e sementes, o número de sementes por fruto, a porcentagem e o tempo médio de germinação e a porcentagem de plântulas anormais e de sementes mortas, em sementes escarificadas e testemunha. A escarificação foi realizada com esmeril elétrico, na parte basal da semente. A semeadura foi efetuada em substrato de areia e serragem (1:1), em quatro repetições de 50 sementes, em delineamento inteiramente... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mean germination time; Dormancy; Scarification; Hymenaea. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200005 |
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| Barros,Renato T. de; Martins,Cibele C.; Silva,Givanildo Z. da; Martins,Dagoberto. |
| ABSTRACT The invasive behavior of beggarticks (Bidens pilosa L.) in cropped areas is due to its ecological adaptation and aggressive regeneration, which is dependent on seed germination. The objective of this research was to verify the effects of B. pilosa seed origin and temperature on seed germination. The seeds were collected in Entre Rios do Oeste, PR, Botucatu, SP, Capão Bonito, SP, São Joaquim da Barra, SP, Sertãozinho, SP, Selvíria, MS, Barra do Garças, MT, Areia, PB and Manaus, AM. The seeds were evaluated regarding moisture content, 1000-seed weight, germination speed index and germination at 60 days (normal seedlings, dormant seeds and dead seeds) at the temperatures of 10, 15, 20, 25, 30, 35, 40, and 45 ºC. The replicates were distributed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bidens pilosa; Weed; Production sites; Dormancy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700448 |
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| Pasa,Mateus da Silveira; Felippeto,João; Nava,Gilberto; Souza,André Luiz Kulkamp de; Brighenti,Alberto Fontanella; Petri,José Luiz. |
| Abstract The application of rest breaking agents to compensate the lack of chilling is a common practice in apple orchards in Southern Brazil. However, its necessity in areas of greater chilling accumulation has been questioned over the years. The aim of this study was to investigate the performance of ‘Maxi Gala’ apple in response to different budbreak promoters in São Joaquim, SC. The study was performed in the growing seasons of 2013/2014, 2014/2015, and 2015/2016. Plant material consisted of 10-year-old ‘Maxi Gala’ apple trees grafted on the rootstock ‘M.9’, arranged in a randomized complete block design with five replicates in the 2013/2014 and 2014/2015 growing seasons and six replicates in the 2015/2016 season. Treatments consisted of Erger®,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Dormancy; Flowering; Hydrogen cyanamide. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000500701 |
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| Carvalho,José Edmar Urano de; Nascimento,Walnice Maria Oliveira do. |
| Abstract Hog plum tree seeds (Spondias mombin L.) have a complex dormancy mechanism, which causes slow germination and great unevenness. At present, there are no efficient methods to promote seed germination. The objective of the study was to evaluate the effect of storage on overcoming seed dormancy of this Anacardiaceae. Diaspores of two hog plum trees were used, identified as Mother plant 1 and Mother plant 2, established in Tomé-Açu city, PA. Initially, it was investigated whether the structures surrounding the seeds (internal mesocarp and endocarp) prevent water absorption. For this, the diaspores of the two mother plants were sown between blotting paper, with an adequate level of water and, periodically, in the total of 144 hours, the water content... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spondias mombin L.; Germination; Dormancy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000302001 |
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| Pasa,Mateus da Silveira; Felippeto,João; Nava,Gilberto; Silva,Carina Pereira da; Brighenti,Alberto Fontanella; Ciotta,Marlise Nara. |
| Abstract The application of rest breaking agents to overcome the lack of chilling is a common practice in apple orchards in southern Brazil. However, its necessity in areas of greater chilling accumulation, like in the city São Joaquim, Santa Catarina State (SC), has been questioned over the years. The aim of this study was to evaluate the effect of different budbreak promoters, on the performance of ‘Fuji Suprema’ apple trees, in the region of São Joaquim/SC. The study was performed at the Experimental Station of São Joaquim - Santa Catarina Agricultural Research and Extension Agency (EPAGRI), in the growing seasons of 2013/2014, 2014/2015, and 2015/2016. Plant material consisted of 10-year-old ‘Fuji Suprema apple trees grafted on the rootstock ‘M.9’ and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Dormancy; Flowering; Yield; Hydrogen cyanamide; Nitrogen-calcium solution. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100701 |
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| Hawerroth,Fernando José; Herter,Flavio Gilberto; Petri,José Luiz; Marafon,Anderson Carlos; Leonetti,Jeison Furtado. |
| Temperature is the main climate factor related to induction, maintenance and dormancy release in apple (Malus domestica Borkh.). The inadequate chilling exposure in apples causes budbreak problems, resulting in decrease in yield potential. Thus, the knowledge of physiological principles and environmental factors determining the dormancy phenomenon, especially winter temperature effects, it is necessary for the efficient selection of cultivars in a productive region. In addition, it is indispensable to adapt the orchard management aiming to decrease the problems caused by lack chilling during winter. The objective of this study was to evaluate the influence of different thermal conditions during the dormancy period on budbreak of apple cultivars.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Dormancy; Chilling requirement; Grafted twigs; Apical dominance. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000300007 |
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| SILVA,JOSEANO GRACILIANO DA; LOPES,KILSON PINHEIRO; CAVALCANTE,JERFFESON ARAÚJO; PEREIRA,NATALI ALMEIDA EVANGELISTA; BARBOSA,ROBERTA CHAIENE ALMEIDA. |
| ABSTRACT This study aimed to evaluate the efficiency of different removal methods of sarcotesta and their effects on the physiological quality of the seeds. We applied the following treatments: T1 - friction in coarse sand on a sieve; T2 and T3 - immersion in sulfuric acid (98%) for 30 minutes and washing in water, with and without a vernalization for 48 hours in a refrigerator at 4 °C, respectively; T4 and T5 - natural fermentation for 72 hours, with seeds submitted and not submitted to drying in shade for seven days; and T6 - seeds with intact sarcotesta as control. The experiment was carried out in a completely randomized design. For the analysis of the viability and vigor, we used the germination test, germination on first count, germination speed... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Pomegranate Tree; Sarcotesta; Dormancy; Physiology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000702001 |
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| Registros recuperados: 92 | |
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