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Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres Anais da ABC (AABC)
Silva,Taiza M.; Vilhalva,Divina A.A.; Moraes,Moemy G.; Figueiredo-Ribeiro,Rita de Cássia L..
Among the compounds stored by plants, several functions are assigned to fructans, such as source of energy and protection against drought and extreme temperatures. In the present study we analyzed the anatomy and distribution of fructans in vegetative organs of Dimerostemma vestitum (Asteraceae), an endemic species from the Brazilian campos rupestres. D. vestitum has amphistomatic and pubescent leaves, with both glandular and non-glandular trichomes. In the basal aerial stem the medulla has two types of parenchyma, which differ from the apical portion. The xylopodium has mixed anatomical origin. Interestingly, although inulin-type fructans with high degree of polymerization were found in all analyzed organs except the leaves, the highest amount and maximum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Campo rupestre; Fructans; Inulin spherocrystals; Secretory structures; Xylopodium.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200797
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Diurnal variations of non-structural carbohydrates in vegetative tissues of Melinis minutiflora, Echinolaena inflexa and Lolium multiflorum (Poaceae) Rev. Bras. Bot.
Souza,Amanda de; Sandrin,Carla Z.; Moraes,Moemy G.; Figueiredo-Ribeiro,Rita de Cássia L..
Echinolaena inflexa (Poir.) Chase is a native C3 grass species with high biomass production and abundance in the cerrado comparable to Melinis minutiflora Beauv., a C4 forage grass of African origin, widespread in the cerrado, displacing some native herbaceous species. These species accumulate mainly starch, differently of Lolium multiflorum Lam. ssp. italicum Beck cv. Lema (ryegrass), a C3 temperate forage grass that accumulates fructans as the major storage carbohydrate in the vegetative tissues. In the present study, we analyzed diurnal variations in the content and composition of non-structural carbohydrates (NSC) in the aerial vegetative parts of the three species. Results showed similarity in water-soluble carbohydrates (WSC) and starch contents...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Fructans; Panicoideae; Pooideae; Starch; Sugars.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000400010
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Fructan variation in the rhizophores of Vernonia herbacea (Vell.) Rusby, as influenced by temperature Rev. Bras. Bot.
DIAS-TAGLIACOZZO,GLÁUCIA M.; FIGUEIREDO-RIBEIRO,RITA DE CÁSSIA L.; CARVALHO,MARIA ANGELA M.; DIETRICH,SONIA M. C..
The influence of climatic variations on fructan content in tropical regions is not well known. The present study deals with the effects of temperature on fructan contents in rhizophores of plants of Vernonia herbacea, a native species from the Brazilian cerrado vegetation. Intact plants and fragmented rhizophores were subjected to different temperatures under natural and controlled environmental conditions. Rhizophores of plants in pre-dormant stage (aerial parts showing some yellowish leaves) presented higher fructan content at 5oC than those kept at 25oC, whereas in dormant plants (aerial parts absent) temperature treatments did not affect fructan contents. Fragmented rhizophores obtained from dormant plants presented higher levels of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Fructans; Cerrado; Low temperatures.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500007
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Growth, photosynthate partitioning and fructan accumulation in plants of Vernonia herbacea (Vell.) Rusby under two nitrogen levels Braz. J. Plant Physiol.
Cuzzuol,Geraldo Rogério Faustini; Carvalho,Maria Angela Machado de; Zaidan,Lilian B.P..
The effect of two nitrogen concentrations on fructan accumulation and plant growth was analysed in plants of Vernonia herbacea during a year period. Plants of this species accumulate inulin-type fructans in the underground reserve organs (rhizophores). The plants were cultivated in glasshouse conditions and received weekly nutrient solutions containing 1.3 mmol.L-1 NO3- (N-limited) or 10.7 mmol.L-1 NO3- (N-sufficient). Plants treated with N-sufficient solution presented an increase in total growth with higher biomass, more but smaller leaves resulting in higher total leaf area, higher net assimilation rate, specific leaf mass and higher biomass allocation to aerial organs. In addition, these plants presented higher contents of reducing sugars and lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Cerrado; Fructans; Underground reserve organs.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000400008
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Inulin production by Vernonia herbacea as influenced by mineral fertilization and time of harvest Rev. Bras. Bot.
CARVALHO,MARIA ANGELA MACHADO DE; PINTO,MARCOS MECCA; FIGUEIREDO-RIBEIRO,RITA DE CÁSSIA LEONE.
The underground organs of Vernonia herbacea (Vell.) Rusby, known as rhizophores, acumulate 80% of their dry mass as fructans of the inulin type. In view of the growing industrial use of fructans as dietetic and general food products, and of their medical application, the present investigation aimed at evaluating the effect of mineral fertilization and period of cultivation on the production of these carbohydrates in field trials. Plants used in the experiments were obtained by vegetative propagation from rhizophores collected from plants growing in natural areas of the cerrado, and cultivated for two years. Fertilization consisted of N:P2O5:K2O (80:200:150 kg.ha-1) plus 80 kg.ha-1 nitrogen as dressing. Soil fertilization did not stimulate biomass or inulin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Fructans; Cerrado; Mineral fertilization.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000300006
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Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado Anais da ABC (AABC)
Appezzato-da-Glória,Beatriz; Cury,Graziela.
In the Brazilian Cerrado (neotropical savanna), the development of bud-bearing underground systems as adaptive structures to fire and dry periods can comprise an important source of buds for this ecosystem, as already demonstrated in the Brazilian Campos grasslands and North American prairies. Asteraceae species from both woody and herbaceous strata have subterranean organs that accumulate carbohydrates, reinforcing the adaptive strategy of these plants to different environmental conditions. This study aims to analyse the morpho-anatomy of underground systems of six species of Asteraceae (Mikania cordifolia L.f. Willd., Mikania sessilifolia DC, Trixis nobilis (Vell.) Katinas, Pterocaulon alopecuroides (Lam.) DC., Vernonia elegans Gardner and Vernonia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Buds; Compositae; Fructans; Stem tuber; Xylopodium.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300017
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Optimization study of fructans extraction from Agave tequilana Weber azul variety Ciênc. Tecnol. Aliment.
SALAZAR-LEYVA,Jesús Aarón; OSUNA-RUIZ,Idalia; RODRÍGUEZ-TIRADO,Víctor Alfonso; ZAZUETA-PATRÓN,Iris Eréndira; BRITO-ROJAS,Héctor Daniel.
Abstract Agave tequilana Weber azul variety is a valuable source of fructans. In this study, a response surface methodology was employed to optimize the extraction yield of fructans from agave pines. A Box Behnken factorial design was applied to evaluate the effects of several conditions such as extraction temperature, water raw material ratio and extraction time on extraction yield. Under the optimum extraction conditions (extraction temperature of 79.1 °C, water raw material ratio of 5.13 mL/g, and extraction time of 1.48 h) fructans extraction yield was 83.12%. The chromatographic profile of the agave crude extract presented four peaks, out of which fructans were the most preponderant (~87%). The obtained results suggest that the response surface...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fructans; Agave; Extraction yield; Optimization; Response surface methodology.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000400631
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Ultrasound-assisted extraction of fructans from agave (Agave tequilana Weber var. azul) at different ultrasound powers and solid-liquid ratios Ciênc. Tecnol. Aliment.
SÁNCHEZ-MADRIGAL,Miguel Ángel; AMAYA-GUERRA,Carlos Abel; QUINTERO-RAMOS,Armando; BÁEZ-GONZÁLEZ,Juan Gabriel; NÚÑEZ-GONZÁLEZ,María Adriana; RUIZ-GUTIÉRREZ,Martha Graciela; GARZÓN-TIZNADO,José Antonio.
Abstract The effects of ultrasound-assisted extraction (UAE) at different ultrasound power densities (UPDs; 40, 80, and 120 mW/mL) and solid:liquid (S:L) ratio (1:2, 1:3, and 1:6) on the extraction of carbohydrates from Agave tequilana plant of different ages were evaluated. Extracts obtained (6- and 7-year-old plant) were analyzed in the yield of carbohydrates (YC), fructan (FRU) content, simple sugars, fructan profile and the average degree of polymerization (DPn). UPD, S:L ratio, and plant age all affected YC, FRU, and DPn. Maximum YC and FRU were obtained from the older agave with UPD and S:L ratio of 120 mW/mL and 1:6, respectively; while glucose, fructose, and sucrose were highly released from the younger plant. Agave of 7-year-old presented the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agave; Fructans; Ultrasound; Power density; Solid:liquid ratio; Plant age.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000200261
Registros recuperados: 8
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