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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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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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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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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 Influence of Sorghum Aqueous Extracts and Sorghum Powder on Germination Indices and Seedling Vigor of Hybrid Corn and Jungle Rice Planta Daninha
YAR,S.; KHAN,E.A.; HUSSAIN,I.; RAZA,B.; ABBAS,M.S.; MUNAZZA,Z..
ABSTRACT: Allelopathy has become a paramount tool for controlling weeds in crop plants without deteriorating the environment. Allelopathic effects of sorghum aqueous extracts and sorghum powder on a single cross maize (Zea mays L.) hybrid “HC-8080” and a summer weed, jungle rice (Echinochloa colona L.) were assessed in the research laboratory of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, KPK, Pakistan. The treatments included: T1: control (untreated check), T2: sorghum aqueous extract at a rate of 5 mL kg-1 soil, T3: sorghum aqueous extract at a rate of 10 mL kg-1 soil, T4: sorghum aqueous extract at a rate of 15 mL kg-1 soil, T5: sorghum powder at a rate of 5 g kg-1 soil, T6: sorghum powder at a rate of 10 g kg-1 soil and T7:...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sorghum allelopathy; Germination; Growth; Maize.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100205
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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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Análises das sementes de Cratylia argentea: cultura potencial para adubação verde e forragem. Infoteca-e
ARAÚJO, S. N.; MATRANGOLO, W. J. R.; MIRANDA, G. A. de; NETTO, D. A. M.; SILVA, I. H. S. da.
A Cratília é leguminosa arbustiva nativa do cerrado, tolerante à seca e a solos ácidos e tem potencial para adubação verde e forrageamento. Por essas características, pode ser utilizada pelo agricultor familiar. Objetivou-se verificar a viabilidade das sementes para posterior produção de mudas e doação a produtores familiares. As vagens foram coletadas de 126 plantas da EPAMIG. Após secagem em estufa, as vagens foram pesadas e debulhadas manualmente, resultando em 14,8 kg de sementes. Essas foram armazenadas em sacos de papel em câmara fria e seca. Foram realizadas as análises de pureza física, peso de mil sementes, determinação do grau de umidade e dois testes de germinação, sendo um inicial e outro após dois meses de armazenamento. Os testes seguiram as...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Leguminosa; Germinação; Semente; Seeds; Germination; Fabaceae.
Ano: 2011 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/911424
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Análisis del crecimiento y calidad de semillas de tres tipos de chile (Capsicum annuum L.). Colegio de Postgraduados
Ayala Villegas, Misael Jorge.
El chile es una de las hortalizas más importante a nivel mundial. México es de los países con mayor producción y al ser centro de origen y domesticación de la especie Capsicum annuum L. tiene una amplia diversidad de materiales agrupados en tipos. Los estudios referentes al crecimiento y desarrollo de la planta y semilla de chile, son escasos y no son recientes. Aquí, se comparó el crecimiento de la planta de los tipos de árbol, ancho y guajillo y se evaluó la calidad de semillas durante su desarrollo. Se utilizaron semillas provenientes del Programa de Conservación de Germoplasma de Chile del Colegio de Postgraduados. Las plantas crecieron bajo condiciones de invernadero en Texcoco, Edo, de México entre el 25 de marzo y el 12 de noviembre de 2010. El...
Palavras-chave: Capsicum annuum; Análisis de crecimiento; Etapa de desarrollo; Etapa de extracción; Germinación; Growth analysis; Development stage; Extraction stage; Germination; Maestría; Fisiología Vegetal.
Ano: 2012 URL: http://hdl.handle.net/10521/722
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Analysis of Genotypic Variability in Avena spp. Regarding Allelopathic Potentiality Planta Daninha
CARRARO-LEMES,C.F.; SCHEFFER-BASSO,S.M.; DEUNER,C.C.; BERGHAHN,S.C.T..
ABSTRACT: The recognized allelopathic activity of oats as a soil-cover plant induces the study of the potential of their germplasm. The objective of this study is to verify if there is genotype variability in the Avena spp. with regard to allelopathic activity. Extracts of A. strigosa ‘Agro Quaraí’, ‘Agro Esteio’, ‘Embrapa139’, ‘AF 12104’, ‘AF 12109’, ‘AF 12202’, ‘AF 12209’, A. sativa ‘UPFPS Farroupilha’ and ‘AF 1345 Ucraniana,’ were prepared in three concentrations w/v (5 g, 10 g, and 20 g of dry mass 100 mL-1). The experiment was conducted in a germination chamber for 15 days, with lettuce (Lactuca sativa L.) as the recipient plant. There was complete inhibition of germination under 20% w/v extracts and partial inhibition at 10% w/v. Only 5% w/v observed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avena sativa L.; Avena strigosa Schreb; Weed; Germination; Inhibition.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100297
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Anatomía y tolerancia a la desecación de semillas de cacao (Theobroma cacao L.) Colegio de Postgraduados
Rangel Fajardo, María Alma.
La adquisición de tolerancia a la desecación en semillas ortodoxas es una estrategia adaptativa que no presentan las semillas del tipo recalcitrantes y por consiguiente son sensibles a la desecación. El grado de tolerancia o sensibilidad a la desecación se ve afectada por varios aspectos de origen genético, fisiológico, bioquímico y anatómico; por consiguiente existen diferencias entre genotipos y entre individuos dentro del genotipo de la misma especie. En este estudio se documentaron características de anatomía de las semillas de cacao, se midió el grado de tolerancia a la desecación y la acumulación de azúcares en relación con tolerancia a la desecación en poblaciones de tres orígenes genéticos de cacao (Theobroma cacao L.). Se emplearon los...
Tipo: Tesis Palavras-chave: Theobroma cacao L.; Anatomía; Desecación; Estaquiosa; Germinación; Rafinosa; Semilla; Sensibilidad; Doctorado; Producción de semillas; Anatomy; Drying; Germination; Raffinose; Seed sensitivity; Stachyose.
Ano: 2009 URL: http://hdl.handle.net/10521/1246
Registros recuperados: 366
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