Seleção de populações de Lotus corniculatus L. com maior tolerância ao alumínio em solução nutritiva

Janke, Aline; Dall'Agnol, Miguel; Santos, Armando Martins dos; Bissani, Carlos Alberto

doi:10.1590/s1516-35982010001100008

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The opposite was noted for UFRGS, which showed quadruple amount of polyphenols in soil with Al compared to that when it was cultivated in soil without Al (Table 1). Since previous studies have shown that this genotype has more Al tolerance than other genotypes of common birdsfoot trefoil (Draco and São Gabriel) (SANTOS et al, 2007(SANTOS et al, , 2008JANKE et al, 2010), the findings of this study indicate a possible association between tolerance to acidity and production of PCs in this species. If such a relationship is confirmed, the catechin and epicatechin contents could be used as chemical markers for Al tolerance.…”

Section: Resultssupporting

confidence: 55%

“…Thus, the fact that only UFRGS maintained the epicatechin:catechin proportion in both soil acidity conditions might be related to the selection process to which it was submitted. This genotype is preferred as forage material owing to its higher tolerance to Al (SANTOS et al, 2007;JANKE et al, 2010). Among the possible causes of Al tolerance is the amount of polyphenols, such as catechins that can detoxify this element by chelation (CHEN et al, 2009).…”

Section: Speciesmentioning

confidence: 99%

See 1 more Smart Citation

Procyanidins in Lotus L. genotypes grown in soil with different saturations of aluminum

et al. 2016

Self Cite

View full text Add to dashboard Cite

Condensed tannins are formed by monomers of procyanidins and prodelfinidins, where the proportion and concentration of their monomers varies according to the plant species and environmental conditions. In Lotus spp., condensed tannins prevent tympanism in ruminants that feed on them. This study aimed to evaluate the concentration of procyanidins and their monomers, catechin and epicatechin in the genotypes of Lotus L. grown in soil with different saturations of aluminum. A two-factor (genotype × Al saturation) assay was performed, where the genotypes São Gabriel, Ganador, and UFRGS (Lotus corniculatus L.); Serrano (Lotus uliginosus); and El Rincón (Lotus subbiflorus) were cultivated in soil with an Al saturation of 0-20 %. The procyanidins were evaluated using high-performance liquid chromatography, which was previously validated for catechin and epicatechin. The concentration of procyanidins and the proportion of epicatechin:catechin were affected by the genotype × environment interaction. In L. corniculatus and L. subbiflorus, the concentration of procyanidin was significantly higher when they were grown in the soil with an Al saturation of 20 % compared to that when they were grown in the soil with 0 % Al saturation, but the opposite effect was observed in L. uliginosus. The proportion of epicatechin:catechin decreased in plants grown in soil without Al, and only the UFRGS genotype maintained a similar proportion under both the soil acidity conditions. The predominant monomer was epicatechin, which varied from 57 % to 75 % according to the soil in which the plants were grown. Key words: Catechin, birdsfoot trefoil, epicatechin, proanthocyanidins ResumoOs taninos condensados são formados por monômeros de procianidinas e prodelfinidinas, cuja proporção e concentração dos seus monômeros varia de acordo com a espécie vegetal e condições ambientais. Em Lotus spp., são essas substâncias que evitam o timpanismo em ruminantes que delas se alimentam. O objetivo deste trabalho foi avaliar a concentração de procianidinas e de seus monômeros, catequina e epicatequina, em genótipos de Lotus L. sob distintas saturações de alumínio no solo. O ensaio consistiu de um bifatorial (Genótipo x Saturação de Al), no qual os genótipos São Gabriel, Ganador e UFRGS (L. corniculatus L.), Serrano (L. uliginosus) e El Rincón (L. subbiflorus) foram cultivados em solo com 0 % e 20 % de saturação de Al. As procianidinas foram avaliadas por cromatografia líquida de alta eficiência,

show abstract

Section: Resultssupporting

confidence: 55%

Section: Speciesmentioning

confidence: 99%

Procyanidins in Lotus L. genotypes grown in soil with different saturations of aluminum

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

<b>Aluminum toxicity in roots of legume seedlings assessed by topological analysis

Scheffer-Basso

Prior

2014

Acta Sci. Agron.

View full text Add to dashboard Cite

ABSTRACT. The effect of aluminum (Al) on roots has been evaluated based on linear and weight measurements, but how this element influences the branching configuration of the root system remains unknown. The objective of this study was to assess aluminum toxicity in the roots of 21-day old seedlings from three forage legumes using topological analysis: Adesmia latifolia, Trifolium repens and T. pratense. The legumes were grown in dystrophic Red Latosol that had either been treated or not treated with dolomitic lime. This resulted in two Al saturation and pH treatments: (a) Al= 0%, pH= 6.2; and (b) Al= 16%, pH= 4.8. The following attributes were determined: number of first-order roots, external links (magnitude), total links in the longest unique path (altitude), total links in the primary root (primary root altitude), total exterior path length, total links, internal links, branching points and proportion of branching in the primary root. The topological variables were significantly reduced by Al for all of the legume species. There was a more randomized or dichotomous branching configuration in the seedlings grown in acid soil and A. latifolia was the most plastic of the species. Toxicidade do alumínio em raízes de plântulas de leguminosas forrageiras avaliada por análise topológica RESUMO. O efeito do alumínio (Al) em raízes tem sido avaliado por medidas lineares e de peso, mas ainda não se conhece a influência desse elemento na configuração da ramificação do sistema radicial. Este estudo teve como objetivo avaliar a toxicidade do alumínio em plântulas de 21 dias de idade de três leguminosas forrageiras, Adesmia latifolia, Trifolium repens and T. pratense, por meio de análise topológica. As plantas foram cultivadas em Latossolo vermelho distrófico tratado ou não com calcário dolomítico, o que resultou em dois níveis de saturação de Al e pH: (a) Al= 0%, pH= 6,2; (b) Al= 16%, pH= 4,8. Foram determinados: número de raízes de primeira ordem, segmentos externos (magnitude), segmentos do caminho mais longo (altitude), total de segmentos da raiz primária (altitude da raiz primária), segmentos totais, segmentos internos, pontos de ramificação e pontos de ramificação, caminho total percorrido total, proporção de ramificações na raiz primária e comprimento da raiz primária. As variáveis topológicas foram reduzidas significativamente pelo Al, independente de leguminosa. Na presença de alumínio o sistema radicial mostrou configuração de ramificação mais aleatória ou dicotômica e A. latifolia foi a leguminosa com maior plasticidade.

show abstract

Seleção de populações de Lotus corniculatus L. com maior tolerância ao alumínio em solução nutritiva

Cited by 2 publications

References 9 publications

Procyanidins in Lotus L. genotypes grown in soil with different saturations of aluminum

Procyanidins in Lotus L. genotypes grown in soil with different saturations of aluminum

<b>Aluminum toxicity in roots of legume seedlings assessed by topological analysis

Contact Info

Product

Resources

About