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The toxicity of jack bean [Canavalia ensiformis (L.) DC.] canatoxin to plant pathogenic fungi
OLIVEIRA, A. E. A.;GOMES, V. M.;SALES, M. P.;FERNANDES, K. V. S.;CARLINI, C. R.;XAVIER-FILHO, J.;
Revista Brasileira de Biologia , 1999, DOI: 10.1590/S0034-71081999000100008
Abstract: protein fractions obtained from seeds of the jack bean (canavalia ensiformis) as well as the amino acid canavanine, present in these seeds, were tested for their capacity to inhibit the growth of the phytopathogenic fungi macrophomina phaseolina, colletotrichum gloesporioides, sclerotium rolfsii and fusarium oxysporum. we found that most of the proteins examined and also canavanine did not have any effect on the growth of these fungi. on the other hand the toxic protein canatoxin was found to be effective, at a concentration of 2%, in the inhibition of the growth of m. phaseolina, c. gloesporioides and s. rolfsii.
The toxicity of jack bean [Canavalia ensiformis (L.) DC.] canatoxin to plant pathogenic fungi  [cached]
OLIVEIRA A. E. A.,GOMES V. M.,SALES M. P.,FERNANDES K. V. S.
Revista Brasileira de Biologia , 1999,
Abstract: Protein fractions obtained from seeds of the jack bean (Canavalia ensiformis) as well as the amino acid canavanine, present in these seeds, were tested for their capacity to inhibit the growth of the phytopathogenic fungi Macrophomina phaseolina, Colletotrichum gloesporioides, Sclerotium rolfsii and Fusarium oxysporum. We found that most of the proteins examined and also canavanine did not have any effect on the growth of these fungi. On the other hand the toxic protein canatoxin was found to be effective, at a concentration of 2%, in the inhibition of the growth of M. phaseolina, C. gloesporioides and S. rolfsii.
Photosynthetic performance in jack bean [Canavalia ensiformis (L.) D.C.] under drought and after rehydration
Zanella, Fábio;Watanabe, Tania Misae;Lima, Ana Lúcia da Silva;Schiavinato, Marlene Aparecida;
Brazilian Journal of Plant Physiology , 2004, DOI: 10.1590/S1677-04202004000300008
Abstract: the effects of drought and rehydration on canavalia ensiformis (l.) d.c. (jack bean) plants were evaluated using the following gas exchange parameters: net carbon assimilation rate (a), stomatal conductance (gs), ci/ca ratio and transpiration rate (e); chlorophyll a fluorescence: fv/fm and fv/f0 ratio. the plants were cultivated under greenhouse conditions and after 30 days from the emergence, irrigation was suspended in the plants submitted to drought, to obtain the following predawn leaf water potential (ypd): -0.40 mpa (control), -1.00 mpa (moderate drought) and -2.30 mpa (severe drought). afterwards, the gas exchange and fluorescence analysis were initiated , and 24 h after rehydration the same analyses were repeated. the a, e, gs and ci/ca values decreased significantly under both drought treatments, without however changing the fv/fm and fv/f0 values. the gas exchange parameters recovered after rehydration. it seems that drought affected photosynthesis by stomatal inhibition, as shown by the decreased gs and ci/ca values, besides the maintenance of psii phtotochemical efficiency. the recovery of gas exchange after rehydration could be due to plant protection mechanisms.
PENGARUH PENAMBAHAN ISOLAT PROTEIN KORO PEDANG (Canavalia ensiformis L.) TERHADAP KARAKTERISTIK CAKE [Effects of Addition of Protein Isolates from Jack Bean Seed (Canavalia ensiformis L.) on the Characteristics of Cake]  [cached]
Achmad Subagio,Wiwik Siti Windrati,Yuli Witono
Jurnal Teknologi dan Industri Pangan , 2003,
Abstract: Addition of jack bean (Canavalia ensiformis L.) protein isolate in cake making was studied. The isolate was prepared from the beans by the method of isoelectrical point at pH 4. At low concentrations (less than 1% of the wheat flour), the addition of the protein isolate could improve the characteristics of the cake by increasing the loaf volume, decreasing the density, and softening the texture. In contrast, the addition of 1.5% tended to decrease the quality of the cake as compared to that added with 1% by decreasing the loaf volume, increasing the density, and hardening the texture. However, the more protein isolate added, the more slowly the rate of the cake staling.
Nutri o mineral do feijoeiro em influência de nitrogênio e palhadas de milheto solteiro e consorciado com feij o-de-porco = Bean mineral nutrition influenced by nitrogen and straws of millet and millet plus jack bean intercropping
Cícero Monti Teixeira,Gabriel José de Carvalho,Carlos Alberto Silva,Messias José Bastos de Andrade
Acta Scientiarum : Agronomy , 2010,
Abstract: O objetivo foi avaliar o efeito das palhadas de milheto (Pennisetum typhoides (Burm.) Stapf) e milheto + feij o-de-porco (Canavalia ensiformes (L.) DC.) e diferentes doses de nitrogênio, na nutri o mineral do feijoeiro. O delineamento foi em blocos casualizados, comquatro repeti es, em esquema de parcelas subdivididas, em Latossolo Vermelho, em plantio direto. As parcelas foram constituídas pelas palhadas e as subparcelas por um fatorial 2 x 4 + 1, representado por duas doses de N na semeadura (30 e 60 kg ha-1) e quatro em cobertura (0, 40, 80 e 120 kg ha-1), mais um tratamento adicional, correspondente a 30 kg ha-1 de N na semeadura, sem cobertura, com inocula o das sementes com Rhizobium tropici e aplica o foliar de Co e Mo. A palhada de milheto + feij o-de-porco proporcionou maiores teores foliares de N e Mg. A cobertura nitrogenada aumentou o teor do nutriente até a dose de 116 kg ha-1, proporcionando incrementos lineares nos teores de K e S. Para os teores de Mg houve intera o tripla. O tratamento adicional aumentou o teor de N sob palhada de milheto, os teores de K e Cu e o rendimento de gr os sob ambas palhadas e reduziu os teores de Ca e Mg, sob palhadas de milheto e milheto + feij o-de-porco, respectivamente. As doses de N em cobertura aumentaram o rendimento de gr os em ambas as doses de base, com maior resposta na de 30 kg ha-1 de N. This study was carried out to evaluate the effect of straws of millet (Pennisetum typhoides (Burm.) Stapf) and millet plus jack bean (Canavalia ensiformes (L.) DC.) intercropping and nitrogen fertilization levels on bean mineral nutrition in a no-till system. The experiment was carried out in a randomized blocks design and four replications in a split-plot arrangement, with the straws in the plots and nitrogen levels at sowing (30 and 60 kg ha-1) and at topdressing (0, 40, 80 and 120 kg ha-1) as a 2 x 4 + 1 factorial in sub-plots, plus an additional treatment with 30 kg ha-1 at sowing, without topdressing, and seed inoculation with Rhizobium tropici with Co and Mo foliar application. The millet plus jack bean straw provide the highest N and Mg contents. N topdressing levels increased N foliar concentration up to 116 kg ha-1, providing a linear effect in K and S contents and differenced effects on Mg concentration, depending on the N level at sowing and straw combinations. The additional treatment increased the N concentration only in millet straw, K and Cu in two straws, and reduced the Ca and Mg contents, under millet and millet plus jack bean straws, respectively. Thetopdressing levels increased the grain
Absor??o de chumbo e potencial de fitorremedia??o de Canavalia ensiformes L.
Romeiro, Solange;Lag?a, Ana Maria Magalh?es Andrade;Furlani, Pedro Roberto;Abreu, Cleide Aparecida de;Pereira, Bruno Fernando Faria;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000200017
Abstract: phytoextraction is an important technique used for decontamination of areas polluted by heavy metals. consequently, understanding the physiological responses in relation to the tolerance of tropical species subjected to increasing levels of contamination is fundamental before considering their use as phytoextractans in contaminated areas. the objective of our study was to assess the potential of canavalia ensiformes l. for the phytoextraction of lead (pb). plants were cultivated with nutrient solution in greenhouse under partially controlled conditions. pb was tested at concentrations of 100, 200 and 400 μmol.l-1. the experimental set-up was a randomized blocks design, using a 4 x 1 factorial scheme, with three replicates. follow-ups of physiological symptoms were carried out, determining fresh and dried mass for shoot and root, leaf area, plant height, pb content in nutrient solution and in roots and shoot of the plants. the samples of shoot and roots and of the nutrient solution were submitted to chemical analysis for the determination of pb, using dry digestion. the canavalia ensiformes plants proved to be both accumulators and tolerant to pb, demonstrating their potential as a phytoextractants.
Fitomassa, teor e acúmulo de micronutrientes do milheto, feij o-deporco e guandu-an o, em cultivo solteiro e consorciado = Micronutrient phytomass, levels and accumulation in millet, jack bean and pigeon pea, as sole crops and in intercropping
Cícero Monti Teixeira,Gabriel José de Carvalho,Messias José Bastos de Andrade,Ant?nio Eduardo Furtini Neto
Acta Scientiarum : Agronomy , 2008,
Abstract: O consórcio entre gramíneas e leguminosas para produ o de palha, no sistema plantio direto, visa conciliar a prote o do solo, por meio da maior durabilidade da gramínea, com a fixa o de N e disponibiliza o mais rápida de nutrientes pela decomposi o da leguminosa. Diante disso, instalou-se um experimento para determinar a produ o de fitomassa e o teor e acúmulo de micronutrientes do milheto, feij o-de-porco e guandu-an o, em cultivo solteiro enos consórcios da gramínea com as leguminosas, para a produ o de palha no plantio direto. O trabalho foi conduzido no campo experimental do Departamento de Agricultura da Universidade Federal de Lavras – Lavras, Estado de Minas Gerais. O delineamento foi o deblocos casualizados, com sete tratamentos, para os teores das espécies em cultivo solteiro e consorciado e cinco tratamentos para produ o de fitomassa e acúmulo de micronutrientes, comquatro repeti es. Apenas o guandu-an o solteiro apresentou menor produ o de fitomassa fresca e seca, com os demais tratamentos produzindo, em média, 12,361 e 2,854 t ha-1 de fitomassa fresca e seca, respectivamente. Houve diferen as significativas para os teores de B, Cu e Zn e para os acúmulos de todos os micronutrientes avaliados. As leguminosas apresentaram maiores teores de B e o milheto, maiores teores de Cu e Zn. De forma geral, o consórcio entremilheto e feij o-de-porco apresentou os maiores acúmulos de micronutrientes. Intercropping leguminous with gramineous crops for straw production in no-tillage systems aims to conciliate soil protection(through greater durability of gramineous crops) with nitrogen fixation and faster micronutrient availability (through leguminous decomposition). Therefore, an experiment was conducted withthe intention of evaluating phytomass production as well as micronutrient levels and accumulation in millet (Pennisetum typhoides (Burm.) Stapf), jack bean (Canavalia ensiformes (L.) DC.), and pigeon pea (Cajanus cajan, dwarf cultivar), as sole crops and intercropping gramineous with leguminous crops, for straw production in a no-tillage system. The experiment was carried out in the experimental field at the Agriculture Department of the Federal University of Lavras (Lavras, Minas Gerais state, Brazil). The experimental was conducted using a randomized block design, with seven treatments for species nutrient levels under different conditions (sole crops orintercropping) and five treatments for phytomass production and micronutrient accumulation, with four replications. For phytomass production, only the pigeon pea sole crop displayed loweryie
Aduba??o verde no controle de plantas invasoras nas culturas de alface-americana e de repolho
Fontanétti, Anastácia;Carvalho, Gabriel José de;Morais, Augusto Ramalho de;Almeida, Karina de;Duarte, Whasley Ferreira;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000500001
Abstract: the objective of this work was to verify allelopathical and physical effects of black velvet bean (stizolobium aterrimum piper e tracy), jack bean (canavalia ensiformes dc) and sunnhep (crotalaria juncea l.) on the development of the weeds in american lettuce and cabbage crops. the experiment was performed at the vegetables sector of universidade federal de lavras, in lavras mg, from december 2001 to august 2002. the experimental design used was random blocks in the 4 x 2 factorial scheme with 3 repetitions. one factor consisted of the three leguminous, black velvet bean, jack bean and sunnhep, and the control (spontaneous vegetation); the other factor consisted of the cultures of lettuce ( raider cultivar) and cabbage ( kenzan cultivar). the results showed that the black velvet bean and jack bean controlled the sedge and the cabbage cultivation reduced the sedge infestation.
Produ??o de biomassa e teor de macronutrientes do milheto, feij?o-de-porco e guandu-an?o em cultivo solteiro e consorciado
Teixeira, Cícero Monti;Carvalho, Gabriel José de;Furtini Neto, Ant?nio Eduardo;Andrade, Messias José Bastos de;Marques, Edson Luiz Silva;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000100011
Abstract: the object of this work was to evaluate the biomass production and the macronutrients quantity of millet (pennisetum typhoides (burm.) stapf), jack bean (canavalia ensiformes (l.) dc.), guandu (cajanus cajan, (l.) millsp.) dwarf cultivar, and the millet with leguminous consortiums to straw production in no-tillage system. the experiment was carried in experimental area at agriculture department of the federal university of lavras (lavras, minas gerais state, brazil). the experimental design was randomized blocks, with five treatments and four replications. for biomass production, only the guandu presented smaller fresh and dry biomass yield than the other treatments. in general, the leguminous presented the greatest n and ca quantities and millet the greatest quantities of s. only jack bean presented minor p quantity. for k the greatest quantities were verified for single milett and its incropping with leguminous and jack bean in intercroppin with millet. the minor quantities of mg were observed for guandu.
Bulk Density in Jack Bean’s Development Grown in Cerrado Oxisol  [PDF]
Edna Maria Bonfim-Silva, Juliana Terezinha Sasso Paludo, Tonny José Araújo da Silva, Salom?o Lima Guimar?es
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.69134
Abstract: The use of cover plants promotes the recycling of nutrients and the increase in organic mass, and minimizes the effects of erosion. The objective was to evaluate the effect of bulk density in the development of jack bean (Canavalia ensiformis) in Cerrado Oxisol. The experiment was conducted in a greenhouse at the Federal University of Mato Grosso, Rondonópolis-MT, in the period from June to September 2013. Oxisol was used from a Cerrado reserve area, collected at 0 - 0.20 m depth. The experimental design was completely randomized, corresponding to bulk density levels (1.0, 1.2, 1.4, 1.6 and 1.8 Mg·m-3), and five replications. The experimental plot consisted of three PVC rings (polyvinyl chloride) with 150 mm internal diameter, 300 mm total height, where the upper and lower rings of pots were filled with 1.0 Mg·m-3 density soil and intermediaries according to bulk density treatments. The results were submitted to variance analysis and, when significant, to regression analysis, both with a 5% probability, using SISVAR software. At 60 days after germination, number of leaves, stem diameter, plant height, dry mass of leaves, stem dry mass, dry mass of roots, dry mass of nodules, number of nodules and chlorophyll index (SPAD index) were evaluated. The increase in bulk density negatively influences the development of jack bean, showing little efficiency as a decompacting plant in Cerrado Oxisol.
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