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2,4-D Hormesis Effect on Soybean Planta Daninha
SILVA,J.R.O.; MARQUES,J.N.R.; GODOY,C.V.C.; BATISTA,L.B.; SILVA,A.A.; RONCHI,C.P..
ABSTRACT: The hormesis effect of 2,4-D, applied at two stages of soybean development, on the physiological components of crop yield, was investigated. Soybean seeds of the cultivar ‘AG 3680 IPRO’ were sown in pots containing 7 L of a substrate and kept in a greenhouse. A randomized complete block design with four replicates was used. Eighteen treatments were tested, arranged in a split-plot scheme. The plots consisted of two stages of herbicide application (V4 and V6), and the split-plots were arranged by nine 2,4-D doses (0, 5, 10, 15, 20, 25, 30, 40, and 50 g ha-1). At the time of harvest, 100 days after sowing, significant interactions between crop development stages and 2,4-D doses were observed for the number of nodes in the main stem (NNMS) and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Auxin; Herbicide.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100154
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A transcriptome approach towards understanding the development of ripening capacity in Bartlett pears (Pyrus communis L.). Repositório Alice
NHAM, N. T.; FREITAS, S. T. de; MACNISH, A. J.; CARR, K. M.; KIETIKUL, T.; GUILATCO, A. J.; JIANG, C.-Z.; ZAKHAROV, F.; MITCHAM, E. J..
The capacity of European pear fruit (Pyrus communis L.) to ripen after harvest develops during the final stages of growth on the tree. The objective of this study was to characterize changes in Bartlett pear fruit physico-chemical properties and transcription profiles during fruit maturation leading to attainment of ripening capacity.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pyrus communis; Amadurecimento; Propriedades físico-químicas; Maturação; Pêra; Pos-colheita; Pear; Auxin; Ethylene.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1026361
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Aeração e adição de sais na produção de ácido indol acético por bactérias diazotróficas. Repositório Alice
RADWAN, T. EL-S. EL-D.; MOHAMED, Z. K.; REIS, V. M..
Foi analisada a produção de compostos indólicos por Azospirillum brasilense Cd, A. lipoferum Br 17, Herbaspirillum seropedicae Z 67, H. rubrisubalbicans M4 e a estirpe 34 isolada de arroz, que não se enquadra em nenhuma das espécies de Herbaspirillum já descritas, em relação a diferentes condições de aeração e concentrações de sais. A maior aeração do meio propiciou aumento na produção de compostos indólicos pelas bactérias testadas. Foi verificado aumento desses compostos, em culturas estáticas, em meio sem nitrogênio no caso de Azospirillum, e na presença de N para as estirpes de Herbaspirillum. O aumento da concentração de sais no meio de cultivo inibiu a produção de compostos indólicos, embora tenha sido observado um pequeno aumento quando a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Azospirillum; Herbaspirillum; Auxina; Ácido-3-indol acético; Compostos indólicos; Auxin; Indole-3-acetic acid; Indole compounds.
Ano: 2005 URL: http://www.alice.cnptia.embrapa.br/handle/doc/116597
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Agronomic performance of Marandu grass treated with plant growth biostimulants in the Amazon biome Arq. Bras. Med. Vet. Zootec.
Oliveira,W.F.; Lima,E.M.; Gomes,D.I.; Alves,K.S.; Santos,P.M.; Azevedo,G.S.; Mezzomo,R..
ABSTRACT The aim was to evaluate the effect of different doses of two biostimulants on the productivity and canopy structure of Urochloa brizantha cv. Marandu grass in the establishment fase. The study was conducted in Universidade Federal Rural da Amazônia, Parauapebas, Pará, Brazil. One module of 35 plots of 25m² were established. A completely randomized experimental design was used, with seven treatments and five replicates. The treatments included a control, 0.5, 1, and 2kg/ha of biostimulant A (BIOST.A); and 0.25, 0.5, and 1L/ha of biostimulant B (BIOST.B). Three collections were performed. The data for application of the two biostimulants were analyzed separately, using the Dummy variable method and regression analysis. The application of 2kg/ha...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Auxin; Cytokinin; Gibberellin; Forage stimulation; Urochloa brizantha.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200603
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An improved protocol for somatic embryogenesis and plant regeneration in macaw palm (Acrocomia aculeata) from mature zygotic embryos. Repositório Alice
LUIS, Z. G.; PEREIRA, J. E. S..
bitstream/item/180015/1/Luis-Scherwinski-Pereira2014-Article-AnImprovedProtocolForSomaticEm.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zygotic embryos; Auxin; Plant regeneration; Arecaceae; Morphogenesis; Somatic embryos.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/994992
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Application of brassinosteroid to Tabebuia alba (Bignoniaceae) plants Rev. Bras. Fisiol. Veg.
ONO,ELIZABETH ORIKA; NAKAMURA,TERUKO; MACHADO,SÍLVIA RODRIGUES; RODRIGUES,JOÃO DOMINGOS.
The objective of this study was to observe the effects of brassinosteroid, gibberelin, and auxin application on the development and foliar anatomy of Tabebuia alba (Cham.) Sandw. seedlings. T. alba seedlings were grown in plastic bags with fertilized soil and treated with the following: 1- water (control); 2- brassinolide (BR1) 0.104 mM; 3- BR1 0.208 mM; 4- 3-indoleacetic acid (IAA) 0.2854 mM; 5- IAA 0.5708 mM; 6- GA3 (gibberellin A3) 0.1443 mM; 7- GA3 0.2887 mM; 8- GA3 0.072 mM + IAA 0.1427 mM; 9- GA3 0.1443 mM + IAA 0.2854 mM; 10- GA3 0.072 mM + BR1 0.052 mM; and 11- GA3 0.1443 mM + BR1 0.104 mM. Plant height and petiole length were measured before the treatments and 21 days after application of the growth regulators. These data allowed the calculation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tabebuia alba L.; Brassinosteroids; GA3; Auxin; Growth.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300002
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AVOCADO SEEDLINGS MULTIPLE STEMS PRODUCTION Rev. Bras. Frutic.
PAIXÃO,MARCUS VINICIUS SANDOVAL; LOPES,JOSÉ CARLOS; SCHMILDT,EDILSON ROMAIS; ALEXANDRE,RODRIGO SOBREIRA; MENEGHELLI,CAROLINE MERLO.
ABSTRACT This study aimed to evaluate the potential of multi-stems in avocado seeds according to their mass as well as the adventitious rooting of multi-stem budding with or without the use of auxin. The research was carried out at the Vegetation House of Federal Institute of Espírito Santo, Campus Santa Teresa -ES, with seeds of different masses: <60 g, 61 to 80 g, 81 to 100 g and >100 g, in which each experimental unit was made of five seeds, distributed within five repetitions, under a completely randomized design. The seeds were put to germinate and the percentage number of emergence and multiple stems were evaluated. After 150 days, the following evaluations were carried out: survival of rooted cuttings; number of leaves; stem diameter; root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avocado; Seeds; Multi-stem; Rooting; Auxin; Persea americana Miller.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200901
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Calogênese em explantes foliares de Mammea americana L. Repositório Alice
FERREIRA, M. das G. R.; SANTOS, M. R. A. dos; ROCHA, R. B..
O Abricó-do-Pará é uma espécie nativa das Índias Ocidentais pertencente à família Clusiaceae. É consumida in natura e na forma de sucos, doces, licores, etc. A propagação in vitro apresenta-se como técnica alternativa para propagação da espécie, contribuindo para a obtenção de plantas com características genéticas uniformes, idênticas à planta mãe, livres de doenças, além da obtenção de um grande número de plantas em pequeno espaço, independente da época do ano. O presente trabalho tem como objetivo estabelecer um protocolo para indução da calogênese em segmentos foliares de abricó-do-pará. Foram empregados segmentos foliares como explantes, os quais foram inoculados em meios MS, WPM e Knudson, acrescidos de 2,4-D (0,0; 2,0 e 4,0 mg L-1) e BAP (0,0; 2,0 e...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Propagação in vitro; Clusiaceae; Citocinina; Auxina; In vitro propagation; Cytokinin; Auxin.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1013877
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CHANGES IN OSMOTIC AND IONIC INDICATORS IN Ananas comosus (L.) cv. MD GOLD PRE-TREATED WITH PHYTOHORMONES AND SUBMITTED TO SALINE MEDIUM Rev. Bras. Frutic.
MELO,YURI LIMA; DANTAS,CIBELLEY VANÚCIA SANTANA; LIMA-MELO,YUGO; MAIA,JOSEMIR MOURA; MACÊDO,CRISTIANE ELIZABETH COSTA DE.
ABSTRACT The aim of this study was to evaluate the effect of NaCl on the hydroponic culture of cv. MD Gold pineapple pretreated with the phytohormones naphthaleneacetic acid (NAA) and 6-benzylaminopurine (BAP) using indicators of water stress and osmotic adjustment. Pineapple seedlings from saline treatments in the absence (-NB) and presence (+NB) of the phytohormones during the in vitro culture were grown in Hoagland & Arnon (1950) nutrient solution in the absence and presence of different NaCl concentrations (50; 100 and 150 mM) for 10 days in a greenhouse. Plants obtained from in vitro culture pretreated with phytoregulators (+NB) showed distinct physiological responses compared to non-treated plants (-NB) in relation to dry mass (DM) in roots,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ananas comosus (L.); Auxin; Cytokinin; Osmoregulators; Salt stress.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200101
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CHEMICAL AGENTS AND SHADING LEVELS FOR THE PRODUCTION OF PEPPER SEEDLINGS REA
Binotti,Eliana D. C.; Costa,Edilson; Binotti,Flávio F. da S.; Batista,Thiago B..
ABSTRACT The aim of this study was to evaluate protected cultivation environments with different levels of shading and application of foliar chemical agents, on growth, photosynthetic pigments and seedling quality of Capsicum frutensens L. The experiment was developed at the State University of Mato Grosso do Sul, University Unit of Cassilândia, with chili pepper. Three cultivation environments (screen of 18, 35 and 50% of shading) and six leaf chemical agents were used [(1) control – without application; (2) Nitrogen (N) 1%; (3) Paclobutrazol 50 mg L-1 + N 1%; (4) Auxin 0.05 g L-1 + N 1%; (5) Gibberellin 0.05 g L-1 + N 1%; and (6) Auxin 0.05 g L-1 + Gibberellin 0.05 g L-1 + N 1%]. Each environment was considered an experiment in which the completely...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Auxin; Capsicum frutensens L; Gibberellin; Light; Nitrogen; Paclobutrazol.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400450
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Comparative study of wild and transformed salt tolerant bacterial strains on Triticum aestivum growth under salt stress BJM
Afrasayab,Shazia; Faisal,Muhammad; Hasnain,Shahida.
Eleven salt tolerant bacteria isolated from different sources (soil, plants) and their transformed strains were used to study their influence on Triticum aestivum var. Inqlab-91 growth under salt (100 mM NaCl) stress. Salt stress caused reduction in germination (19.4%), seedling growth (46%) and fresh weight (39%) in non-inoculated plants. In general, both wild and transformed strains stimulated germination, seedling growth and fresh weight in salt free and salt stressed conditions. At 100 mM NaCl, Staphylococcus xylosus ST-1 caused 25% increments in seedling length over respective control. Soluble protein content significantly enhanced (49%) under salt stress as compared to salt free control. At 100 mM NaCl parental strain PT-5 resulted about 32%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Plasmid; Rhizobacteria; Salinity; Auxin; Transformation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400013
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Cutting of the Berberis laurina Billb. Using Different Concentrations of Indolebutyric Acid PFB - Pesquisa Florestal Brasileira
Althaus, Michelle Melissa; Leal, Luciana Christina; Silveira, Fernanda Christina; Zuffellato-Ribas, Katia Christina; Ribas, Luciana Lopes Fortes.
Berberis laurina Billb. (Berberidaceae) is a native shrub from Floresta Ombrófila Mista ecological formation, very ornamental and useful specie for recovery of degraded areas. With medical applications, its fruit is edible and its roots are used as dye. This paper aims to analyze lhe induction of lhe rooting of Berberis laurina stem cuttings employing indolebutyric acid (IBA) in O, 1000 and 2000 mgL-1 concentrations, using the vermiculite as growing medium. In october 2003, stem cuttings were collected from eight stock plants, located in Fazenda Rio Grande - PR. Semi-hardwood cuttings were preppared with 8.0 cm long by 0.35 cm of diameter shape, containing three leaves on the top, cut in a half,  the base was cut in diagonal and the top was cut straight,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rooting; Auxin; Ornamental species; Species for recovery of degraded areas Enraizamento; Auxina; Espécie ornamental; Recuperação de áreas degradadas.
Ano: 2011 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/243
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Efeito do 2,4-D + Thiabendazol e do AIB sobre o enraizamento de tocos enxertados de seringueira. Infoteca-e
PEREIRA, J. da P.; MORAES, V. H. de F.; OLIVEIRA JÚNIOR, R. C. de O..
Com base nos resultados positivos do emprego de 2,4-D associado ao Thiabendazol no enraizamento de mudas na fase "palito", superando inclusive o AIB l000 ppm, testou-se a sua utilizacao no enraizamento de tocos enxertados de seringueira e, se viavel, indica-los como sucedaneos do AIB por serem de baixo custo e mais facil aquisicao.
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Seringueira; Hevea; Especie; Porta-enxerto; Enraizamento de estaca; Hormonio vegetal; Acido giberelico; Brasil; Amazonas; Rubber tree; Species; Grafting; Rootstock; Cutting; Auxin; 2; 4-d.
Ano: 1983 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/665378
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Efeito do ácido indolbutírico no enraizamento de estacas de ramos semilenhosos de pessegueiro. Repositório Alice
TOFANELLI, M.B.D.; CHALFUN, N.N.J.; HOFFMANN, A.; CHALFUN JÚNIOR, A..
Neste trabalho objetivou-se estudar o efeito do ácido indolbutírico (AIB) na formação de raízes adventícias em estacas semilenhosas de nove cultivares-copa (Arlequim, Aurora, Biuti, Diamante, Momo, Ouromel, Pérola de Mairinque, Premier e Tropical) e dois porta-enxertos (Okinawa e R-15-2) de pessegueiro. O experimento foi realizado na Universidade Federal de Lavras, Lavras, MG, em nov./dez. de 1997. As concentrações de AIB utilizadas foram de 0, 1.000, 2.000 e 3.000 mg L-1, e as estacas tiveram a base imersa em solução durante cinco segundos. O AIB influenciou no enraizamento, na formação de calo e no número de raízes. As maiores porcentagens de enraizamento foram observadas nas cultivares Pérola de Mairinque (56,62%) e Tropical (55,04%), ambas ocorrendo na...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Prunus persica; Raízes adventícias; Auxina; Propagação vegetal; Adventitious roots; Auxin; Plant propagation.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/107471
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Effects of auxin and misting on the rooting of herbaceous and hardwood cuttings from the fig tree Rev. Ciênc. Agron.
Sousa,Cleiton Mateus; Busquet,Rubens Nei; Vasconcellos,Marco Antônio da Silva; Miranda,Ricardo Motta.
Propagation of the fig tree predominately uses hardwood cuttings obtained from pruning stock plants. With a view to optimising fig tree propagation, the effects of auxin and misting on the rooting of herbaceous and hardwood cuttings from the fig tree were evaluated. An experiment was set up in a 2x2x2 factorial design, with two types of cuttings (softwood and hardwood), two levels of auxin (0 and 1000 mg L-1 indolbutyric acid) and two environments (with and without misting). Thirty days after starting the experiment, rooting, root length, sprouting and losses were all evaluated. The interaction of the type of cutting and the auxin was significant for rooting, sprouting, root length and cutting loss. Misting did not affect the variables analysed. In the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fig tree; Auxin; Plant propagation; Cut.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200016
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Effects of light and ethylene on endogenous hormones and development of Catasetum fimbriatum (Orchidaceae) Braz. J. Plant Physiol.
Suzuki,Rogério M.; Kerbauy,Gilberto B..
This study attempted to clarify the effects of dark, light and ethylene on plant growth and endogenous levels of indole-3-acetic acid (IAA), cytokinins and abscisic acid in Catasetum fimbriatum. Dark-incubation fully inhibited root and pseudobulb formation as well as leaf growth, but favored shoot elongation. The results of continuous and active growth in dark-incubated shoots (stolons) were induced by strong apical meristem sink activity and by the significantly increased levels of cytokinins in shoots. In fact, shoot length, cytokinin and IAA levels in dark-incubated shoots were about twice as great as for those grown under light conditions. Moreover, the total cytokinin level in shoots of C. fimbriatum under light conditions without ethylene was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Auxin; Cytokinins; Etiolation; Plant growth; Plant hormones.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300002
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Effects of plant growth promoting rhizobacteria (PGPR) on rooting and root growth of kiwifruit (Actinidia deliciosa) stem cuttings Biol. Res.
ERTURK,YASAR; ERCISLI,SEZAI; HAZNEDAR,AYHAN; CAKMAKCI,RAMAZAN.
The effects of plant growth promoting rhizobacteria (PGPR) on the rooting and root growth of semi-hardwood and hardwood kiwifruit stem cuttings were investigated. The PGPR used were Bacillus RC23, Paenibacillus polymyxa RC05, Bacillus subtilis OSU142, Bacillus RC03, Comamonas acidovorans RC41, Bacillus megaterium RC01 and Bacillus simplex RC19. All the bacteria showed indole-3-acetic acid (IAA) producing capacity. Among the PGPR used, the highest rooting ratios were obtained at 47.50% for semi-hardwood stem cuttings from Bacillus RC03 and Bacillus simplex RC19 treatments and 42.50% for hardwood stem cuttings from Bacillus RC03. As well, Comamonas acidovorans RC41 inoculations indicated higher value than control treatments. The results suggest that these...
Tipo: Journal article Palavras-chave: PGPR; Stem cuttings; Kiwifruit; Rooting; Auxin.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000100011
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Endogenous auxin and cytokinin contents associated with shoot formation in leaves of pineapple cultured in vitro Braz. J. Plant Physiol.
Mercier,Helenice; Souza,Beatriz Maia; Kraus,Jane Elizabeth; Hamasaki,Regina Mayumi; Sotta,Bruno.
The in vitro culture of pineapple leaves on a shoot induction medium (SIM) results in the formation of protuberances and further development in shoots, and plantlets. The contents of endogenous indoleacetic acid (IAA) and five cytokinins (Cks), N6(2-isopentenyl)adenine (iP), N6(2-isopentenyl)adenosine (iPR), zeatin (Z), zeatin riboside (ZR) and N6-benzyladenine (BA), present in the basal portion of those leaves, were correlated to the organogenic response that occurs over 15 days of culture. The endogenous auxin/cytokinins ratio was lowest on the 3rd day, mainly due to a strong increase in the iP level. It seems that endogenous iP concentration triggered the induction signal for an organogenic response in pineapple leaf bases. The rise in iP content...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ananas comosus; Auxin; Bromeliaceae; Cytokinin; Hormone signalling; Plant regeneration.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200006
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Endophytes: exploitation as a tool in plant protection BABT
Dutta,Devanushi; Puzari,Keshab Chandra; Gogoi,Robin; Dutta,Pranab.
Endophytes are symptomless fungal or bacterial microorganisms found in almost all living plant species reported so far. They are the plant-associated microbes that form symbiotic association with their host plants by colonizing the internal tissues, which has made them valuable for agriculture as a tool in improving crop performance. Many fungal endophytes produce secondary metabolites such as auxin, gibberellin etc that helps in growth and development of the host plant. Some of these compounds are antibiotics having antifungal, antibacterial and insecticidal properties, which strongly inhibit the growth of other microorganisms, including plant pathogens. This article reviews the endophyte isolated from different plants, mode of endophytic infection and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibiotics; Auxin; Endophytism; Insecticidal; Symbiotic.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500621
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Endophytic colonization of rice (Oryza sativa L.) by the diazotrophic bacterium Burkholderia kururiensis and its ability to enhance plant growth Anais da ABC (AABC)
Mattos,Katherine A.; Pádua,Vania L.M.; Romeiro,Alexandre; Hallack,Leticia F.; Neves,Bianca C.; Ulisses,Tecia M.U.; Barros,Claudia F.; Todeschini,Adriane R.; Previato,José O.; Mendonça-Previato,Lucia.
Burkholderia kururiensis is a diazotrophic bacterium originally isolated from a polluted aquifer environment and presents a high level of similarity with the rice endophyte "B. brasilensis" species. This work assessed the ability of B. kururiensis to endophytically colonize rice plantlets by monitoring different tissues of root-inoculated plants for the presence of bacterial growth in different media, electron microscopy and by 16S rDNA analysis. Observations of roots, stems and leaves of inoculated rice plantlets by electron microscopy revealed B. kururiensis colonization predominantly on root hair zones, demonstrating endophytic colonization primarily through the endodermis, followed by spreading into xylem vessels, a possible pathway leading to aerial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Burkholderia kururiensis; Colonization; Rice; Diazotrophic bacterium; Auxin.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300009
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