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| Registros recuperados: 23 | |
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| Jesus, Valquíria Aparecida Mendes de; Braccini, Alessandro Lucca; Scapim, Carlos Alberto; Santos, Fábio Lúcio; Mariucci, Giovanna Emanuelle Goncalves; Suzukawa, Andréia Kazumi. |
| This work aimed to study the effect of the Calophyllum brasiliense seed coat on the seed germination process. To this end, three experiments were conducted in laboratory, greenhouse and screenhouse. From a total of six treatments, five are related to the seed coat (mechanical scarification; mechanical scarification followed by 2 hours in water, chemical scarification, hot water immersion and complete seed coat removal) and one control. Laboratory and greenhouse experiments were conducted in a completely randomized design (CRD). Screenhouse experiment was conducted in a completely randomized block design (RBD). We evaluated the total percentage, the speed index and the average time of germination or emergence. Data were subjected to analysis of variance and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.01.00.00-0; 2.03.00.00-0 native species; Diaspore; Seed dormancy; Calophyllum brasiliense Biologia Geral; Botânica. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21401 |
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| Figueiredo,Maurílio Assis; Baêta,Hudson Eustáquio; Kozovits,Alessandra Rodrigues. |
| Native grasses are potential species to be used in land rehabilitation. However, due to the lack of better knowledge of their performance, preference is given to exotic plants, which may be invasive and negatively affect the local biodiversity. In order to better understand the propagation of native species of the Quadrilátero Ferrífero (Minas Gerais, Brazil) using their seeds, and in so doing, indicate possible candidates for land rehabilitation, this study investigated the germination patterns of the following grasses: Andropogon bicornis L.; Andropogon leucostachyus Kunth; Setaria parviflora (Poir.) Kerguélen; Cenchrus brownii Roem. & Schult; Echinolaena inflexa (Poir.) Chase, and Apochloa euprepes (Renvoize) Zuloaga & Morrone. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poaceae; Seed dormancy; Storage time; Heating; Potassium nitrate; Caryopsis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300013 |
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| Salomão,Antonieta Nassif. |
| The ability to tolerate ultra-low temperature (-196 ºC) exposure was evaluated in 66 tropical orthodox seed species of 21 botanical families from the Cerrado (Brazilian Savannah) and Atlantic Forest Brazilian biomes. Liquid nitrogen had no effect on the germinability of 51 seed species. The stimulatory effect of cryogenic temperature on germinability, with or without subsequent chemical scarification, was observed in nine seed species with deep physical dormancy, or heterogeneous levels of seed hardness, or with no dormancy. Significant reduction in germinability occurred in six seed species, presumably because of factors acting individually or in combination on these seeds, such as inappropriate moisture content, or the potentially detrimental effect of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryopreservation; Ex situ conservation; Seed dormancy. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200008 |
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| Stanisavljevic,Rade; Ðjokic,Dragoslav; Milenkovic,Jasmina; Ðukanovic,Lana; Stevovic,Vladeta; Simic,Aleksandar; Dodig,Dejan. |
| During post-harvest maturation, different species vary in the length of dormancy breaking or germination increases. Seed dormancy and slow seedling development often limit establishment of forage grass stands. Seed germination and seedling vigour of Italian ryegrass (Lolium italicum A. Braun, Synonym Lolium multiflorum L.), cocksfoot (Dactylis glomerata L.) and timothy (Phleum pretense L.) were observed after harvest and storage. After harvest in June, seeds were stored under standard storage conditions and sampled every 30 days after harvest (DAH), up to 270 DAH, and then every 60 days up to 990 DAH. At each date, seeds were tested for final germination percentage and for seedling vigour traits. Timothy seeds had a maximum germination (88%) and the best... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage grasses; Post-harvest maturation; Seed dormancy. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600014 |
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| Lin,Yu; Liu,Shihang; Liu,Yaxi; Liu,Yujiao; Chen,Guoyue; Xu,Jie; Deng,Mei; Jiang,Qiantao; Wei,Yuming; Lu,Yanli; Zheng,Youliang. |
| Abstract Pre-harvest sprouting (PHS) is a major abiotic factor affecting grain weight and quality, and is caused by an early break in seed dormancy. Association mapping (AM) is used to detect correlations between phenotypes and genotypes based on linkage disequilibrium (LD) in wheat breeding programs. We evaluated seed dormancy in 80 Chinese wheat founder parents in five environments and performed a genome-wide association study using 6,057 markers, including 93 simple sequence repeat (SSR), 1,472 diversity array technology (DArT), and 4,492 single nucleotide polymorphism (SNP) markers. The general linear model (GLM) and the mixed linear model (MLM) were used in this study, and two significant markers (tPt-7980 and wPt-6457) were identified. Both markers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: General linear model; Linkage disequilibrium; Marker-trait associations; Mixed linear model; Seed dormancy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400620 |
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| URBANETZ, C.; JORGE, M. H. A.; MARCONCINI, J. M.; GALVANI, F.. |
| Esse trabalho descreve duas metodologias, uma para extração de sementes de bocaiuva de dentro do coquinho (pirênio) para obtenção de sementes sem injúrias mecânicas e outra para extração da casca da parte da cicatriz da semente e condicionamento para facilitar as trocas gasosas durante o tempo de germinação das sementes. Ambas são para ajudar a contornar o problema de dormência física das sementes da espécie que dificulta a produção de mudas. As duas metodologias, descritas na forma de protocolos, são simples, mas eficientes e aplicáveis para pequenos e médios produtores. Esperamos que essas metodologias facilitem o processo de produção de mudas de bocaiuva, de modo que possam ser usadas em sistemas de plantio visando a exploração racional e sustentável da... |
| Tipo: Folhetos |
Palavras-chave: Semente; Dormência da semente; Acrocomia Aculeata; Bocaiúva; Seeds; Seed dormancy. |
| Ano: 2016 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1065090 |
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| Cao, Liangzi; Hayashi, Kazuki; Tokui, Mayumi; Mori, Masahiko; Miura, Hideho; Onishi, Kazumitsu. |
| Pre-harvest sprouting (PHS) is one of the serious problems for wheat production, especially in rainy regions. Although seed dormancy is the most critical trait for PHS resistance, the control of heading time should also be considered to prevent seed maturation during unfavorable conditions. In addition, awning is known to enhance water absorption by the spike, causing PHS. In this study, we conducted QTL analysis for three PHS resistant related traits, seed dormancy, heading time and awn length, by using recombinant inbred lines from 'Zenkouji-komugi' (high PHS resistance) x 'Chinese Spring' (weak PHS resistance). QTLs for seed dormancy were detected on chromosomes 1B (QDor-1B) and 4A (QDor-4A), in addition to a QTL on chromosome 3A, which was recently... |
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Palavras-chave: Wheat; Pre-harvest sprouting; Seed dormancy; Heading time; Awn length. |
| Ano: 2016 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4476 |
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| Stanisavljević,Rade; Djokić,Dragoslav; Milenković,Jasmina; Terzić,Dragan; Djukanović,Lana; Stevović,Vladeta; Dodig,Dejan. |
| The objectives of this work were to determine whether and at which seed physiological maturity stage the diquat desiccant affects the tall oat-grass (Arrhenatherum elatius) seed quality and yield, as well as the proper storage period between harvest and sowing. Diquat desiccation was evaluated in applications during milk or dough seed maturation stages. Seeds conventionally produced and stored under traditional storage conditions were used for the analyses. Seed samples were drawn every 30th day after harvest (DAH). After the 240th DAH, samples were drawn every 90th day up the to 690th DAH. The highest yield were obtained by desiccation applied at the beginning of the seed dough stage, with a satisfactory seed quality. Both final germination and seedling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arrhenatherum elatius; Germination; Seed dormancy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001100010 |
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| Zhang,LW; Liu,HL; Zhang,DY; Bian,WG. |
| Seed dormancy release and germination of Corispermum lehmannianum Bunge were tested using various treatments: temperature, cold stratification, gibberelins (GA3), dry storage and sand burial. Results showed that temperature and light did not affect the germination of fresh seeds, cold stratification and GA3 could improve seed germination, whereas dry storage and sand burial did not. The germination percentage was highest at 35/20 °C after the cold stratification and GA3 treatments. Corispermum lehmannianum seeds were classified as non-deep, Type-2, physiological dormancy (PD), whose seed dormancy could be released by cold stratification and GA3. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed germination; Seed dormancy; Gurbantunggut desert. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100009 |
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| Galvan,J.; Rizzardi,M.A.; Peruzzo,S.T.; Ovejero,R.F.. |
| The seed bank is characterized by the amount of seeds and other viable reproductive structures in the soil and it is changed by the input and output of seeds, being classified by its permanence in the soil as transient or permanent. The tillage and crops used decisively influence this dynamic and more disturbed areas tend to have richer seed banks. The purpose of this study was to test different soil tillage and crop systems, aiming to reduce or eliminate the ryegrass in the area. The experiment was conducted from 2010 to 2012. In the first year, the effect of chemical tillage was assessed, compared to the area without tillage. From the second year on, in the area that received chemical tillage, the second experiment was installed, where it was assessed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed dormancy; Chiseling; Seeds viability; Weeds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200183 |
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| Noldin,J.A.; Chandler,J.M.; McCauley,G.N.. |
| Red rice is a troublesome weed in irrigated rice production and is spread through contaminated commercial rice seed and machinery. Seed dormancy is a major trait for red rice. Studies were carried out at two locations to determine red rice seed longevity in the soil of several ecotypes from four US states. Five months after burial near Beaumont, Texas only three ecotypes had viable seed (<1%) when buried at 5 cm, but 9 ecotypes had viable seed after two years when buried at 25 cm. At the thirty-sixth month after burial, ecotypes Arkansas 2, Louisiana 2 and 4, Mississippi 4 and Texas 1 had viable seeds, but at less than 1%. Freshly harvested red rice seeds buried at 12 cm near College Station, TX, survived longer than seeds placed on the soil surface.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Red rice; Oryza sativa; Rice; Seed survival; Seed dormancy; Strawhull ecotypes; Blackhull ecotypes. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582006000400001 |
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| Registros recuperados: 23 | |
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