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A simple screening technique for salinity tolerance in rice: germination rate under stress International Rice Research Institute
Abeysiriwardena, D. S. de Z..
p.78-79
Palavras-chave: Salinity; Salt tolerance; Germination; Screening; Cultivars.
Ano: 2004 URL: http://hdl.handle.net/123456789/1068
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Accelerated ageing test to evaluate vigour in Jatropha curcas L. seeds Rev. Ciênc. Agron.
Oliveira,Glauter Lima; Dias,Luiz Antônio dos Santos; Dias,Denise Cunha Fernandes dos Santos; Soares,Marcos Morais; Silva,Laércio Junio da.
There is currently great interest in the cultivation of the Jatropha curcas L., known locally as physic nut, for the production of biodiesel, leading to an increase in the demand for seeds and precise information as to their physiological quality, especially vigour. The objective was to evaluate the efficiency of the accelerated ageing test, with variations, in verifying the vigour of Jatropha seeds. Four seed lots were initially characterized as to their physiological quality by germination and vigour tests. For accelerated ageing test, temperatures of 42 and 45 ºC were tested during 48, 72 and 96 hours. The experiment was carried out in a completely randomized design and the averages of the treatments compared by Tukey test (p<0,05). The Pearson...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiological quality; Germination; Physic nut.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100015
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Accelerated aging as vigor test for sunn hemp seeds Ciência Rural
Silva,Clíssia Barboza da; Barbosa,Rafael Marani; Vieira,Roberval Daiton.
ABSTRACT: This study aimed to determine the most appropriate method to assess the sunn hemp ( Crotalaria juncea L.) seed vigor in the accelerated aging test. Five seed lots from harvest 2007/2008 were evaluated for germination, vigor and seedling emergence in the field. Accelerated aging test was performed at 41°C during 48, 72 and 96 hours, with and without sodium chloride saturated solution. Then, the promising procedure was also performed for 2008/2009 and 2009/2010 harvests. In the traditional accelerated aging test, the no-uniform water acquisition by the seeds adversely affected results. Accelerated aging test with sodium chloride saturated solution is the most appropriate method to evaluate the physiological potential of sunn hemp seeds, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotalaria juncea L.; Forage crop; Physiological potential; Germination; Standization.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100402
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Accelerated aging to assess parsley seed vigor Horticultura Brasileira
Tunes,Lilian M de; Pedroso,Daniele C; Gadotti,Gizele Ingrid; Muniz,Marlove Fátima B; Barros,Antonio Carlos SA; Villela,Francisco A.
There are many gaps for the assessment of seed vigor in vegetable crops, among these the parsley. In this context, the accelerated aging test is recognized as one of the most widely used to evaluate seed physiological potential of various crop species, being able to provide information with a high degree of consistency. Thus, the objective of the present study was to evaluate the methodology of accelerated aging test to check parsley seed vigor, as well as verify the possibility of using NaCl solutions as an alternative to control seed water uptake during the aging period without reducing test sensitivity. Four lots of parsley seeds were tested for germination, seedling emergence, and accelerated aging for 48, 72 and 96 h (traditional and NaCl solutions)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Petroselinum sativum; Germination; SSAA; Vegetables; Vigor.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000300018
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Action of gibberellic acid (GA3) on dormancy and activity of alpha-amylase in rice seeds Rev. bras. sementes
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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Adaptabilidade e estabilidade produtiva de genótipos de feijão-caupi de porte semi-ereto na região nordeste do Brasil. Repositório Alice
ROCHA, M. de M.; FREIRE FILHO, F. R.; RIBEIRO, V. Q.; CARVALHO, H. W. L. de; BELARMINO FILHO, J.; RAPOSO, J. A. A.; ALCÃNTARA, J. dos P.; RAMOS, S. R. R.; MACHADO, C. de F..
bitstream/item/32929/1/Adaptabilidade0001.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Feijão-caupi; Genética; Coco; Germinação; Coconuts; Germination.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/372929
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Adaptability and leaf anatomical features in oil palm seedlings produced by embryo rescue and pre-germinated seeds Braz. J. Plant Physiol.
Luis,Zanderluce G.; Bezerra,Kadja Milena G.; Scherwinski-Pereira,Jonny Everson.
Changes in the leaf structure of plants grown in different conditions have been reported, such as increase in size and density of stomata and reduction in stomatal control, amount of epicuticular wax, and mesophyll thickness, with a high diversity of intercellular spaces. However, these changes are highly variable depending on the physiological and morphological characteristics of each species. The objective of this work was to analyze the adaptability and anatomical plasticity of oil palm seedlings produced after embryo rescue and pre-germinated seeds. Expanded leaves were prepared for evaluation of morphometric data and anatomical structures. It was verified that the environmental conditions in vitro negatively influenced the stomata density, epidermal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elaeis guineensis; Arecaceae; Germination; Embryo culture; Acclimatization; Plantlets metabolism.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300008
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Adequação das condições de germinação e crescimento de Phyllosticta sp (f.p. Phaeosphaeria maydis) e avaliação da produção de exoenzimas envolvidas na penetração do patógeno na planta. Repositório Alice
CERVELATTI, E.P.; PACCOLA-MEIRELLES, L.D.; FERNANDES, F.T.; OLIVEIRA, A. C. de.
1998
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Milho; Mancha foliar; Exoenzima; Germinacao; Crescimento; Fungo; Zea mays; Phyllosticta sp; Phaeosphaeria maydis; Germination; Growth; Fungi.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/480646
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Adhesion of uredospores of Phakopsora pachyrhizi on soybean seeds and their viability during storage Rev. bras. sementes
Magnani,Elisandra Batista Zambenedetti; Mendonça,Elisabeth Aparecida Furtado de; Albuquerque,Maria Cristina de Figueiredo e.
To study adhesion and viability of uredospores of the fungus Phakopsora pachyrhizi on soybean seeds during storage, suspension tests of those uredospores were carried out by washing seeds at each 30 days interval. Furthermore, germination and inoculation tests of uredospores on soybean plants were performed with uredospores collected from seeds of two soybean production areas, located in the municipalities "Chapada dos Guimarães" and "Tangará da Serra", State of Mato Grosso, Brazil. High levels of uredospores infestation were detected before storage [249.31 and 85.18 uredospores/100 seeds (U/100)] on seeds collected in both localities, respectively. After 30 days storage, these figures were 46.12 and 122.5 U/100; at 60 days were 14.62 and 26.62 U/100; and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybean rust; Spores; Germination; Infection.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200006
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Adjustment methodology of the tetrazolium test for viability evaluation of angico seeds PFB - Pesquisa Florestal Brasileira
Pinho, Daniel Santos; Borges, Eduardo Euclydes de Lima; Carvalho, Ana Paula Vilela; Corte, Viviana Borges.
Este trabalho teve por objetivo adequar a metodologia do teste em sementes de Anadenanthera peregrina (L.) Speg. As sementes foram pré-condicionadas por imersão em água destilada a 25 ºC por 14 horas. O tegumento foi retirado e os embriões submersos em solução de tetrazólio (pH 6,5) nas concentrações de 0,1%; 0,05% e 0,01%, sendo mantidos no escuro a 25 ºC por três e cinco horas e a 30 ºC por 24 horas. Avaliaram-se a intensidade e localização da coloração, presença de áreas leitosas e aspecto dos tecidos. Os embriões foram classificados em nove classes de viabilidade. O melhor tratamento como substituto do teste padrão de germinação foi a concentração de 0,1% e a incubação a 30 ºC por 24 horas. Sementes viáveis de A. peregrina foram classificadas nas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiological quality; Germination; Anadenanthera peregrina Qualidade; Fisiológica Germinação; Anadenanthera peregrina.
Ano: 2011 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/197
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Adubacao fosfatada, producao e qualidade de sementes de populacoes de amendoim. Repositório Alice
MARUBAYASHI, O. M.; ROSOLEM, C. A.; NAKAGAWA, J.; ZANOTTO, M. D..
O objetivo do presente trabalho foi avaliar a resposta do amendoim (Arachis hypogaea L.) a diferentes doses de adubo fosfatado (0,40,80 e 120kg/ha de P2O5), com vistas a producao e qualidade de sementes. Usou-se superfosfato triplo (45% P2O5 e 15%CaO). As populacoes de amendoim foram: Tatu, Oira, Tupa, FCA 170 e FCA 265. A dose de 40kg/ha de P2O5 exerceu influencia positiva na producao e qualidade das sementes. As populacoes de amendoim apresentaram comportamento assemelhado quanto a producao de sementes e sua germinacao, em todas as doses de P, mas com interacoes entre genotipos e doses de P no peso de 100 sementes e no vigor das sementes. A dose de 40 kg/ha de P2O5, e suficiente para boa producao e qualidade do amendoim.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Arachis hypogaea; Germinacao; Cultivar; Fosforo; Vigor; Germination; Cultivars; Phosphorus.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/84551
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Agrochemicals and storage times on soybean seed vigor. Repositório Alice
BORTOLETTO, W. V.; MACEDO, W. R.; OLIVEIRA, T. C. de; SOUZA, D. S..
The objective of this work was to investigate the potential physiological damage of the treatment of '97Y07RR' soybean seeds with different pesticides at different storage times, in order to define the optimal period of sowing. The germination rate, the germination speed index, and shoot fresh matter were evaluated. Thiamethoxam did not cause losses in seed vigor with increasing storage time; however, the other agrochemicals caused significant losses. Seed treatment should be performed up to 90 days before sowing.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Germination speed index; Physiological quality; Índice de velocidade de germinação; Qualidade fisiológica; Glycine max; Germinação; Tratamento de semente; Glycine max; Germination; Seed treatment.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1068063
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Agrochemicals and storage times on soybean seed vigor PAB
Bortoletto,Wilian Vinicius; Macedo,Willian Rodrigues; Oliveira,Thalyta Coelho de; Souza,Daniela Silva.
Abstract: The objective of this work was to investigate the potential physiological damage of the treatment of '97Y07RR' soybean seeds with different pesticides at different storage times, in order to define the optimal period of sowing. The germination rate, the germination speed index, and shoot fresh matter were evaluated. Thiamethoxam did not cause losses in seed vigor with increasing storage time; however, the other agrochemicals caused significant losses. Seed treatment should be performed up to 90 days before sowing.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Germination; Germination speed index; Physiological quality; Seed treatment..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000200129
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ALLELOPATHIC EFFECT OF LEGUMINOUS WEEDS ON RATE, SYNCHRONIZATION AND TIME OF GERMINATION, AND BIOMASS PARTITIONING IN RICE Planta Daninha
ZOHAIB,A.; ANJUM,S.A.; JABBAR,A.; TABASSUM,T.; ABBAS,T.; NAZIR,U..
ABSTRACT The present study was aimed at determining the allelopathic influence of water extracts at varying concentrations (2.5% and 5% w/v) and residues with varying decomposition periods (0, 15 and 30 days) at 2% (w/w) concentration of four weeds (Trigonella polycerata, Vicia sativa, Lathyrus aphaca, Medicago polymorpha) against rate, synchronization and time of germination, and biomass partitioning of rice through plant and soil bioassays. Germination and biomass partitioning in rice plants were inhibited by extracts and residues. The maximum decrease in energy of germination (88.6%) and increase in time for 50% germination (210.4%) were caused by the L. aphaca extract at 5% concentration as compared to control. Root and shoot, fresh weight (13.6 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Leguminous weeds; Rice; Germination; Biomass partitioning.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100269
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Allelopathic Effect of Some Associated Weeds of Wheat on Germinability and Biomass Production of Wheat Seedlings Planta Daninha
ZOHAIB,A.; TABASSUM,T.; ANJUM,S.A.; ABBAS,T.; NAZIR,U..
ABSTRACT: Weeds associated with crops may impose their phytotoxic effects on crop plants through the release of their allelochemicals and hence seriously reduce crop productivity. The present study was conducted to investigate the allelopathic effect of water soluble phenolics of weeds associated with wheat crop (Vicia sativa, Trigonella polycerata, Lathyrus aphaca, Medicago polymorpha, Melilotus indica) on germinability and biomass production of wheat seedlings by using their water extracts at 2.5% (w/v) and 5% (w/v) concentrations and residues of the same weeds with 0, 15 and 30 d decomposition periods at 2% (w/w) concentration. The results showed that the water extracts of M. indica and V. sativa at 5% concentration imposed the most inhibitory effect on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wheat; Weed allelopathy; Water extracts; Residues; Germination; Biomass production.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100287
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ALLELOPATHIC EFFECT OF Tephrosia cinerea L. (Pers.) PLANT EXTRACTS IN LETTUCE Engenharia na Agricultura
de La Salles, Ana Yasha Ferreira; Souto, Jacob Silva; Borges, César Henrique Alves; Alencar, Lyanne dos Santos; Moreira, Francisco Tibério de Alencar.
Allelopathy has been conceptualized as the direct or indirect effect of a plant onto another one through secondary metabolites, or allelochemicals spread in the environment, with the power to interfere in seed germination and increase or inhibit the development of neighboring plants. The objective of this study was to analyze the possible allelopathic effects of aqueous extracts of Tephrosia cinerea in the germination of lettuce (Lactuca sativa L.) seeds. The experiment has been carried out at the Laboratório de Nutrição Mineral de Plantas (Laboratory of Plant Mineral Nutrition)/UAEF/UFCG in Patos (state of Paraíba). We collected T. cinerea organisms, having separated the stem, leaves, roots fractions and the aerial part of the plant + roots, having...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alelopatia engenharia florestal Allelopathy; Neighboring Plant; Germination.
Ano: 2016 URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/676
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Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae) Acta Botanica
Souza,Flaviana Maluf; Gandolfi,Sergius; Perez,Sonia Cristina Juliano Gualtieri de Andrade; Rodrigues,Ricardo Ribeiro.
We investigated the inhibitory potential of aqueous extracts of bark and leaves of Esenbeckia leiocarpa Engl. on lettuce germination and early seedling growth. We compared the effects of four concentrations (100, 75, 50 and 25%) of each extract to water and polyethylene glycol (PEG 6000) solution controls for four replicates of 50 seeds for germination and four replicates of ten seedlings for seedling growth. The inhibitory effects of E. leiocarpa extracts on the percentage of germination and on the germination speed seemed to be more than simply an osmotic effect, except for the percentage of seeds germinated in bark extracts. When compared to water control, both bark and leaf extracts delayed germination, and leaf extracts also affected the percentage of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Germination; Growth; Inhibition; Plant-plant interaction.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100016
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Allelopathic potential of orsellinic acid derivatives BABT
Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika.
Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027
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Allelopathy in five species of Erythroxylum doi: 10.4025/actasciagron.v35i3.16016 Agronomy
Dutra Taveira, Leila Kelly Pereira; Universidade Regional do Cariri; Silva, Maria Arlene Pessoa; Universidade Regional do Cariri; Loiola, Maria Iracema Bezerra; Universidade Federal do Ceará.
The objective of this study was to determine the allelopathic potential of Erythroxylum rosuliferum O.E. Schulz; Erythroxylum stipulosum; Erythroxylum cuneifolium (Mart) O.E. Schulz; Erythroxylum vacciniifolium Mart. and Erythroxylum barbatum O.E. Schulz. Bioassays were performed to examine the seed germination and initial growth of seedlings of Lycopersicum esculentum Mill (tomato) and Allium cepa L. (onion) in Petri dishes following exposure to an ethanolic extract of fresh leaves from the test species at various concentrations. The growth of the tomato and onion seedlings was inhibited with the extracts of the species tested, and significant alterations in the development of the shoots and primary roots were observed. These results suggest that the five...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fisiologia Vegetal allelopathic properties; Germination; Development of seedlings; Cerrado; Chapada do Araripe Alelopatia.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16016
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Analise de patogenicidade e germinacao do fungo Nomurae rileyi (Farlow) Samson isolados no Distrito Federal. Repositório Alice
TIGANO-MILANI, M.S.; FARIA, M. R. de; LECUONA, R. E.; SARTORI, M. R.; ARIMA, E. Y.; DIAZ, B. M..
bitstream/item/177661/1/ID-106051.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Nomurae rileyi; Distrito Federal; Brasil; Fungo; Germinação; Patogenicidade; Fungi; Germination; Pathogenicity.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/171697
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