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An evaluation of physical and mechanical scarification methods on seed germination of Vachellia macracantha (Humb. & Bonpl. ex Willd.) Seigler & Ebinger Acta Agron. (Palmira)
Maldonado-Arciniegas,Francisco; Rúales,Carlos; Caviedes,Mario; Ramírez,Darío X; León-Reyes,Antonio.
Abstract The dry Andean forests are ecosystems with a high diversity of flora and fauna and are at high risk of extinction due to the pressure of human activity. V. macracantha is a native species of the dry Andean forest, which has potential for reforestation and also provides benefits in agroforestry systems, due to its nitrogen fixation capacity, the supply of organic matter, the production of shade and wind protection. The multiplication of this species is limited due to the low percentage of seed germination, which present dormancy. The aim of this research was to determine the most effective scarification method for seeds germination of V. macracantha. Two types of methods were tested, the immersion in strong acids (chemical scarification), and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroforestry; Agronomic traits; Inter-Andean dry forest; Plant development stages; Seed characteristics; Seed dormancy; Seed germinative capacity.
Ano: 2018 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100120
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Armazenamento de caupi a nivel de fazenda. Repositório Alice
AGUIAR, P. A. A.; MORAES, G. J. de.
Sementes de caupi foram armazenadas com um leve ataque de gorgulho, por um periodo de doze meses, sob condicoes de baixa umidade relativa a temperatura elevada do tropico semi-arido do Nordeste do Brasil. Foram utilizadas as seguintes embalagens: 1 caixa de amianto com cobertura de areia grossa; 2. silo metalico vedado com cera de abelha; 3. silo subterraneo com revestimento de plastico; 4. saco de juta com sementes pulverizadas com oleo de milho; 5. saco de juta. Constatou-se um grande ataque do gorgulho nas embalagens de juta durante o armazenamento, enquanto que as demais embalagens ofereceram uma boa protecao ao ataque da praga, principalmente a caixa de amianto com areia.
Tipo: Artigo de periódico Palavras-chave: Caupi; Armazenagem; Feijão caupi.; Callosobruchus Maculatus; Germinação; Gorgulho; Semente; Feijão de Corda.; Germination; Storage; Vigor; Seed germination; Seed dormancy; Cowpeas..
Ano: 1983 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/131328
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Burial depths favor Italian ryegrass persistence in the soil seed bank. Repositório Alice
CECHIN, J.; SCHMITZ, M. F.; HENCKS, J. R.; VARGAS, A. A. M.; VARGAS, L..
ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a weed broadly found in fields cultivated with wheat and barley crops. Seed inputs into the soil before harvesting winter crops increase seed bank, ensuring survival. This study evaluated the persistence of Italian ryegrass seeds subjected to burial depths over time. Experiments were carried out in the field for two years in randomized block experimental design with four repetitions. Dormant seeds harvested from mother-plants were put in nylon bags containing soil. Previously, seed viability was evaluated in a 1 % tetrazolium solution, and 50 viable seeds by repetition were buried at 0.5, 5.0, 10, and 20 cm depths. Seed persistence was evaluated by the percentage of deteriorated and remaining seeds,...
Tipo: Artigo de periódico Palavras-chave: Lolium multiflorum Lam; Seed bank weed management; Seed longevity; Soil seed bank inputs; Seed dormancy.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129847
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Burial depths favor Italian ryegrass persistence in the soil seed bank Scientia Agricola
Cechin,Joanei; Schmitz,Maicon Fernando; Hencks,Jonas Rodrigo; Vargas,Andres Antonio Monge; Agostinetto,Dirceu; Vargas,Leandro.
ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a weed broadly found in fields cultivated with wheat and barley crops. Seed inputs into the soil before harvesting winter crops increase seed bank, ensuring survival. This study evaluated the persistence of Italian ryegrass seeds subjected to burial depths over time. Experiments were carried out in the field for two years in randomized block experimental design with four repetitions. Dormant seeds harvested from mother-plants were put in nylon bags containing soil. Previously, seed viability was evaluated in a 1 % tetrazolium solution, and 50 viable seeds by repetition were buried at 0.5, 5.0, 10, and 20 cm depths. Seed persistence was evaluated by the percentage of deteriorated and remaining seeds,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lolium multiflorum Lam.; Seed bank weed management; Seed longevity; Seed dormancy; Soil seed bank inputs.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300601
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Desiccation, postharvest maturity and seed aging of tall oat-grass PAB
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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Detection of QTLs for traits associated with pre-harvest sprouting resistance in bread wheat (Triticum aestivum L.) OAK
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...
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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Differential expression of dormancy-associated genes in fastigiata and hypogaea peanut. Repositório Alice
SILVA, M. F. C.; SILVA, C. R. C.; LIMA, L. M. de; SANTOS, R. C. dos; RAMOS, J. P. C..
Seed dormancy is a temporary replacement state observed in some higher plants, which prevents germination under unfavorable conditions. In several species, dormancy process is triggered by hormonal factors, initiated by ABA and precursor enzymes. In this work, we investigated the relationship between dormancy and the expression of ARP, DMR1, and NCED genes in upright and runner peanut seeds. Eight dormancy-contrasting genotypes were previously phenotyped based on germination traits, during three storage periods. Expression of ARP, DMR1 and NCED transcripts was analyzed by qRT-PCR, from endosperm and embryo tissues. Higher expression of NCED and ARP were found in embryo tissues from runner genotypes, IAC Caiapo and LGoPE-06, confirming findings in...
Tipo: Artigo de periódico Palavras-chave: Molecular markers.; Embryo; Arachis Hypogaea; Dormência da semente; Embrião; Endosperma; Amendoim; Marcador molecular; Peanuts; Seed dormancy; Endosperm; Genes..
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1084266
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Disturbance as a factor in breaking dormancy and enhancing invasiveness of African grasses in a Neotropical Savanna Acta Botanica
Gorgone-Barbosa,Elizabeth; Pivello,Vânia R.; Baeza,M. Jaime; Fidelis,Alessandra.
The Cerrado is threatened by wildfires and invasive species. We aimed to evaluate in laboratory conditions whether temperature fluctuation at the soil surface, resulting from the absence of vegetation due to fire, can affect the germination of Urochloa decumbens and U. brizantha, two invasive African grasses. Seeds of both species were submitted to simulations: 1) temperature during fire at 1cm belowground (F); 2) temperature fluctuation at 1cm belowground without vegetation cover for a month (TF); 3) (F) + (TF); 4) control at 25ºC. After treatments, seeds were put to germinate at 25ºC for 40 days. We had four replicates per treatment and three temporal replicates. We compared germination percentage and the mean germination time among treatments using...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Fire; Germination percentage; Invasive species; Physiological dormancy; Seed dormancy; Temperature fluctuation; Urochloa brizantha; Urochloa decumbens.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100131
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Dormência em sementes de guandu (Cajanus cajan (L.) Millsp). Repositório Alice
GODOY, R.; SOUZA, F. H. D. de.
Tipo: Separatas Palavras-chave: Sementes duras; Harseedness.; Armazenamento; Cajanus Cajan; Dormência.; Seed storage.; Seed dormancy.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/45826
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Effect of Scarification, Self-Inhibition, and Sowing Depth on Seed Germination of Lupinus campestris Chilean J. Agric. Res.
Gutiérrez Nava,Pedro; De León González,Fernando; Etchevers Barra,Jorge; Casas Fernández,Alejandro.
Lupinus campestris Schltdl. & Cham. grows in shallow fields and disturbed areas of Central Mexico. It has potential to improve soil fertility and as fodder. Seeds of L. campestris show dormancy, and the technology needed to increase its potential use requires information about conditions favouring seed germination. The aim of this study was to evaluate the seed germination responseof L. campestris under controlled (laboratory) and natural field conditions. Under laboratory conditions, 2 yr old seeds had a maximum germination percentage (50%) when they were scarified with sulphuric acid for 90 min prior to sowing and when laboratory light (0.5 µmol m-2 s-1) was maintained during the diurnal period. Without scarification, only about 3% of the seeds...
Tipo: Journal article Palavras-chave: Seed dormancy; Sowing depth; Green manure.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300003
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Effect of seed coat on the seed germination and seedling development of Calophyllum brasiliense Cambess. (Clusiaceae) Biological Sciences
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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Evolution of Ryegrass Seed Banks Depending on Soil Tillage and Crops Planta Daninha
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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Genome-wide association study of pre-harvest sprouting resistance in Chinese wheat founder parents Genet. Mol. Biol.
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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Germination of native grasses with potential application in the recovery of degraded areas in Quadrilátero Ferrífero, Brazil Biota Neotropica
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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Infusão e óleo essencial de camomila na superação de dormência de sementes de Capsicum pubescens Ruiz & Pav. Repositório Alice
BORSATO, A. V.; AMARAL, A. R. do.
O objetivo deste estudo foi avaliar o efeito da infusão e óleo essencial de camomila [Chamomilla recutita (L.) Rauschert] na superação de dormência de sementes de pimenta rocoto. Utilizou-se cinco tratamentos: T1 = controle, T2 = sementes imersas por 2 h em infusão de camomila, T3 = sementes imersas por 5 h em infusão de camomila, T4 = sementes submetidas à solução com óleo essencial de camomila e T5 = sementes imersas por 5 h em água destilada. Logo após os respectivos tratamentos, as sementes foram semeadas em recipientes feitos com aproveitamento de caixas de leite, contendo composto orgânico caseiro feito a partir de resíduos vegetais e esterco bovino. A dormência de sementes de Capsicum pubescens Ruiz & Pav. foi parcialmente superada utilizando...
Tipo: Separatas Palavras-chave: Germinacao; Emergencia; Dormencia da semente; Semente; Oleo essencial; Seed germination; Seed dormancy; Essential oils.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1057235
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Less is more: little seed processing required for direct seeding in seasonal tropics. Repositório Alice
CORREIA, M. R. de M.; FERREIRA, M. C.; ALVES, M.; CONSOLARO, H. N.; VIEIRA, D. L. M..
Tipo: Artigo de periódico Palavras-chave: Seasonal tropical forest; Seed processing; Cerrado; Ecological restoration; Fabaceae; Seed dormancy.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134659
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Pre-germination treatments and storage of cassava seeds and their correlation with emergence of seedlings. Repositório Alice
MEZZALIRA, I.; COSTA, C. J.; VIEIRA, E. A.; FIALHO, J. de F.; SILVA, M. S.; DENKE, M. L.; SILVA, K. N. da.
Tipo: Separatas Palavras-chave: Tratamento pré-germinativo; Seed technology.; Armazenamento; Germinação; Manihot Esculenta; Mandioca; Semente.; Cassava; Seed dormancy; Storage.; Seed germination.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/959401
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Pre-germination treatments and storage of cassava seeds and their correlation with emergence of seedlings. Repositório Alice
MEZZALIRA, I.; COSTA, C. J.; VIEIRA, E. A.; FIALHO, J. de F.; SILVA, M. S.; DENKE, M. L.; SILVA, K. N. da.
Apesar da propagação de mandioca ser efetuada vegetativamente para fins comerciais, a maioria dos acessos mantém ativo o sistema de propagação sexual, o que é fundamental para programas de melhoramento genético. Entretanto, as sementes de mandioca apresentam germinação baixa e desuniforme. Considerando este fato, o objetivo deste trabalho foi avaliar a eficiência do armazenamento, e de diferentes tratamentos pré-germinativos, na emergência de plântulas de mandioca. Para isso, foi conduzido um experimento com sementes originadas da polinização aberta entre plantas de quatro variedades de mandioca de mesa, nas quais foram testados 10 tratamentos pré-germinativos, mais a testemunha. A viabilidade das sementes submetidas aos tratamentos foi avaliada pelo teste...
Tipo: Separatas Palavras-chave: Seed technology; Tratamento pré-germinativo; Semente; Armazenamento; Germinação; Mandioca; Manihot Esculenta; Cassava; Seed dormancy; Seed germination; Storage.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/977618
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Propagation of Annonaceous plants Rev. Bras. Frutic.
Ferreira,Gisela; De-La-Cruz-Chacón,Iván; Boaro,Carmen Silvia Fernandes; Baron,Daniel; Lemos,Eurico Eduardo Pinto de.
Abstract This review aims to present advances in studies on the propagation of the Annonaceae species, which includes species of economic importance such as: soursop, custard apple, atemoya and cherimoya. In sexual propagation, advances are mainly related to a better understanding of the stages of seed development, dormancy mechanisms, and germination. In asexual propagation, compatibility studies between grafts and rootstocks are presented, focusing on the expression of genes involved in tissue formation. The cutting method is also discussed, which is another option for the propagation for this group of plants considered difficult to root, approaching endogenous and exogenous factors related to the subject, as well as management strategies that affect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annonaceae; Seed dormancy; Germination; Grafting; Cutting.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000104002
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Quebra de dormência em diásporos de teca (Tectona grandis L.f.). Repositório Alice
DIAS, J. R. M.; CAPRONI, A. L.; WADT, P. G. S.; SILVA, L. M.; TAVELLA, L. B.; OLIVEIRA, J. P. de.
Tectona grandis L.f. é uma essência florestal exótica de importância econômica e social para o Brasil. As mudas dessa espécie são produzidas através de diásporos constituídos dos frutos com endocarpo e mesocarpo rígidos. O objetivo do presente trabalho foi avaliar o efeito de métodos de quebra de dormência na germinação das sementes desta espécie. Para superar a dormência do endocarpo e mesocarpo, os diásporos de teca foram submetidos à imersão em água quente, imersão em ácido sulfúrico (33,5%) e imersão em água corrente. Os diásporos foram distribuídos em substrato constituído de areia, e o teste de germinação foi realizado em câmara de germinação com temperatura de 30 ºC, sob luz branca durante oito horas por dia. As avaliações foram feitas diariamente,...
Tipo: Artigo de periódico Palavras-chave: Madera tropical; Salida de la latencia.; Dormancia de semillas; Germinación de las semillas; Essência florestal; Teca; Tectona grandis; Semente florestal; Germinação; Dormência da semente; Quebra da dormência; Tropical wood; Seed germination; Seed dormancy; Dormancy breaking..
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/657783
Registros recuperados: 27
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