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| Registros recuperados: 92 | |
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| Vieira,Antônio Rodrigues; Vieira,Maria das Graças Guimarães Carvalho; Fraga,Antônio C.; Oliveira,João Almir; Santos,Custódio D. dos. |
| To evaluate the effectiveness of gibberellic acid (GA3) in breaking rice seed dormancy and the use of alpha-amylase enzyme activity as an indicator of the dormancy level, seed from the intensively dormant irrigated cultivar Urucuia were used. The seeds were submitted to a pre-drying process in a forced air circulation chamber under 40ºC during 7 days and submersed in 30 mL of GA3 solution under 0, 10, 30 and 60 mg/L H2O concentrations, during 2, 24 and 36 hours. After the treatments, the alpha-amylase activity was determined by using the polyacrilamide electrophoresis and spectrophotometry. At the same time, the germination test was made. The results indicated a gain in germination and in alpha-amylase activity in higher concentrations and soaking time of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rice seeds; Dormancy; Germination; Gibberellic acid (GA3); Alpha-amylase. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222002000200008 |
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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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| 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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| Brito,Leomara Pessoa; Araújo Lacerda,José Dantas; Araújo Soares,Cintia; Monteiro Júnior,Franklin Luís Carlos; Souza,Magno Chagas; Aguiar Fonseca e Souza,Áurea Izabel; Lima,Clenes Cunha; Rodrigues,Marcos. |
| Abstract This study aimed to verify the impact of different methods of overcoming dormancy in the germination of Ipomoea cavalcantei seeds, in addition to surveying the biometric data of its seeds and fruits. Ripe fruits were randomly collected from the species' habitat, which is a unique ecosystem characterized by small vegetation and iron outcrops. For the biometric analyses, the weight, moisture content, length, width, and thickness of 100 fruits and 100 seeds were determined. To analyse the efficiency of overcoming seed dormancy, six different treatments were tested, including mechanical, physical, and chemical methods, and the resultant germinability, average germination time, and germination speed index were evaluated. Further, in order to estimate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation unit; Dormancy; Ipomoea cavalcantei; Mining; Scarification. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122022000100081 |
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| Castro, Damián César; Alvarez, Norma; Gabriel, Paola; Buyatti, Marcela; Favaro, Juan Carlos; Gariglio, Norberto. |
| The purpose of this work was to study the response of two apple cultivars bred for low chilling environments to artificial chilling accumulation. Two trials were carried out; in experiment one, excised shoots were randomly taken from “Caricia” and “Princesa”, and in experiment two, intact and excised shoots of “Caricia”, “Princesa” and “Gala” (control) were collected. After collection, both shoot types were exposed to artificial chilling accumulation (4.0 ± 0.5°C) from 0 to 1200 chill units (CU). Bud break of mixed buds of “Caricia” and “Princesa” was higher than 50% between 0 CU to 1200 CU, irrespective of shoot type. Bud break of “Gala” mixed buds exceeded 50% only in intact shoots after accumulating 900 CU. The mean time to bud break of “Caricia” and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica Borkh; Dormancy; Bud break; Lack of chilling; Heat requirements. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30996 |
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| Jaimes Albíter, Camelia. |
| En la presente investigación, se buscó demostrar que la morfología de fruto y semilla de nanche, está relacionada con el comportamiento germinativo de la especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas; para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de planta, hoja, fruto y semilla y se realizaron dos pruebas de germinación estándar, una con semillas extraídas de los endocarpios y la otra con los endocarpios conteniendo a las semillas. La caracterización morfológica evidenció que el nanche es una especie ampliamente variable, y que los endocarpios de los ecotipos evaluados presentan dureza,... |
| Tipo: Tesis |
Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos; Morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1180 |
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| Jaimes Albíter, Camelia. |
| En la presente investigación, se buscó demostrar que la morfología de fruto y semilla de nanche, está relacionada con el comportamiento germinativo de la especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas; para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de planta, hoja, fruto y semilla y se realizaron dos pruebas de germinación estándar, una con semillas extraídas de los endocarpios y la otra con los endocarpios conteniendo a las semillas. La caracterización morfológica evidenció que el nanche es una especie ampliamente variable, y que los endocarpios de los ecotipos evaluados presentan dureza,... |
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Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/796 |
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| Jaimes Albíter, Camelia. |
| En la presente investigación, se buscó demostrar que la morfología de fruto y semilla de nanche, está relacionada con el comportamiento germinativo de la especie, así como identificar el tipo de latencia que presenta y evaluar el efecto de diversos tratamientos pre-germinativos, para facilitar la germinación de las semillas; para ello, se evaluaron caracteres morfológicos cuantitativos y cualitativos de planta, hoja, fruto y semilla y se realizaron dos pruebas de germinación estándar, una con semillas extraídas de los endocarpios y la otra con los endocarpios conteniendo a las semillas. La caracterización morfológica evidenció que el nanche es una especie ampliamente variable, y que los endocarpios de los ecotipos evaluados presentan dureza,... |
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Palavras-chave: Caracterización morfológica; Escarificación; Germinación; Latencia; Tratamientos pre-germinativos morphologic characterization; Scarification; Germination; Dormancy; Pre-germinative treatments. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/854 |
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| Carvalho,Romulo da S.. |
| Diapause has been poorly investigated in tephritid fruit flies and in associated parasitoids in tropical regions. In this work, diapause in larval-pupal parasitoids of fruit flies is reported for the region of the Reconcavo Baiano, Brazil. Diapause was recorded for individuals of four native species [Doryctobracon areolatus (Szépligeti), Utetes anastrephae (Viereck), Opius sp. (Hymenoptera: Braconidae), Aganaspis pelleranoi (Brethes) (Hymenoptera: Figitidae)] and of one exotic braconid [Diachasmimorpha longicaudata Ashmead]. Diapausing parasitoids were obtained from fruit fly puparia in fruits collected between November 1998 and April 2000. In all, 1.4% of individuals underwent diapause, being D. areolatus the most frequent. The development time for this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Tephritidae; Braconidae; Figitidae; Dormancy. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400012 |
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| Malavasi,Ubirajara Contro; Malavasi,Marlene de Matos. |
| Enterolobium contortisiliquum (Vell.) Morong. is a Mimosaceae tropical tree species recommended for heterogeneous reforestation of degraded tropical areas. "Timburi" seeds present low germination due to the high degree of seed dormancy. Different methods to overcome seed dormancy was compared: sanding, sanding followed by 24 hours water (25ºC) soaking, imbibition in boiling water followed by exposure to water at room temperature (28ºC), and concentrated sulfuric acid (5, 15, 30, 60, 120 or 180 minutes) followed by washing with tap water. All seeds were germinated in rolled towels at 25ºC and 12 hours photoperiod. Total germination, first count of germination test and germination velocity index were recorded. Mechanical scarification (sanding), chemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dormancy; Forest nursery; Germination; Seed. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600003 |
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| Alnimr,Amani M.. |
| Dormancy models for Mycobacterium tuberculosis play important roles in understanding various aspects of tuberculosis pathogenesis and in the testing of novel therapeutic regimens. By simulating the latent tuberculosis infection, in which the bacteria exist in a non-replicative state, the models demonstrate reduced susceptibility to antimycobacterial agents. This minireview outlines the models available for simulating latent tuberculosis both in vitro and in several animal species. Additionally, this minireview discusses the advantages and disadvantages of these models for investigating the bacterial subpopulations and susceptibilities to sterilization by various antituberculosis drugs. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dormancy; Latency; Tuberculosis; Stationary-phase. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300641 |
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| Registros recuperados: 92 | |
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