Tolerance to flooding in five Brachiaria brizantha accessions

Dias‐Filho, M. B.

doi:10.1590/s0100-204x2002000400003

Cited by 25 publications

(25 citation statements)

References 19 publications

(18 reference statements)

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“…Em condições de solo alagado a cultivar Marandu produziu a maior massa seca de colmos nos três cortes, seguida pela cultivar Piatã; este resultado diverge dos encontrados por Caetano & Dias-Filho (2008) ao verificar que o alagamento do solo diminuiu o número de perfilhos nas cultivares Marandu, classificando esta cultivar como pouco tolerante ao alagamento (Dias-Filho, 2002). Contudo, Ramos et al (2011) constataram, analisando respostas fisiológicas e metabólicas de gramíneas (Brachiaria brizantha e Paspalum fasciculatum) ao alagamento, que a deficiência de oxigênio causada pelo alagamento induziu as espécies estudadas a um ajustamento metabólico e fisiológico que permitiu, às plantas, sobreviverem nesta condição desfavorável porém, a espécie Paspalum fasciculatum mostrou ser mais adaptada ao alagamento.…”

Section: Resultsunclassified

Cultivares de Brachiaria brizantha sob diferentes disponibilidades hídricas em Neossolo Flúvico

Kroth

Bonfim-Silva

Silva

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OPropôs-se, com este trabalho, estabelecer a tolerância ao déficit hídrico e ao alagamento do solo na produção de folhas e colmos de três cultivares de Brachiaria brizantha cultivadas em Neossolo Flúvico. O experimento foi realizado em casa de vegetação cujas unidades experimentais foram vasos plásticos com capacidade de solo de 4,2 dm³. O delineamento experimental foi inteiramente casualizado em esquema fatorial 3 x 3, com três cultivares de Brachiaria brizantha (Marandu, Piatã e Xaraés) e três disponibilidades hídricas, sendo solo alagado (0 kPa), capacidade de campo (10 kPa, tratamento controle) e déficit hídrico (50 kPa), em 5 repetições. O solo utilizado foi o Neossolo Flúvico. Para avaliação foram realizados três cortes nos quais foram avaliadas massa seca de folhas, massa seca de colmos e relação folha/colmo. Os dados foram submetidos à análise de variância pelo teste F e, quando significativos, foi aplicado o teste de Tukey até 0,05 de probabilidade. As cultivares de Brachiaria brizantha (Marandu, Piatã e Xaraés) apresentaram susceptibilidade ao déficit hídrico em que a cultivar Marandu foi a única resistente ao alagamento do solo com desenvolvimento expressivo nos três cortes realizados. Brachiaria brizantha cultivars grown under different water availability in Entisol A B S T R A C TThe objective was to establish the tolerance to drought and flooding in the production of leaves and stems of three B. brizantha cultivars in Fluvisol. The experiment was conducted in a greenhouse, where the experimental units were plastic pots with capacity of 4.2 dm³. The experimental design was completely randomized in a factorial 3 x 3 with three cultivars of Brachiaria brizantha (Marandu, Piatã and Xaraés) and three water availability, and, waterlogged soil (0 kPa), field capacity (10 kPa, control) and water deficit (50 kPa) with 5 repetitions. The soil used was Entisol. Three cuttings were performed which were evaluated for dry mass of leaves, dry mass of stems and leaf/stem ratio. Data were subjected to analysis of variance by F test, and when significant Tukey test at 0.05 probability was used. The cultivars of Brachiaria brizantha (Marandu, Piata and Xaraés) were susceptible to drought, being the Marandu the only resistant to flooding, with significant development in the three cuttings.

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Section: Resultsunclassified

Cultivares de Brachiaria brizantha sob diferentes disponibilidades hídricas em Neossolo Flúvico

Kroth

Bonfim-Silva

Silva

et al. 2015

Rev. bras. eng. agríc. ambient.

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Section: O-b-d-apiofuranosyl-(1→5)-b-d-apiofuranosyl-(1→6)-b-d-glucopmentioning

confidence: 99%

“…[6][7][8] Solanum crinitum Lam (Solanaceae), popularly known as "jurubeba" and "fruto-de-lobo", is a shrub or small tree in South America, including southern Brazil and Colombia. 9,10 In the course of our pharmacological and phytochemical investigations of Solanum species, 3,4,8,[11][12][13] we have reported the cytotoxic and antitumoral activities of flavonoids isolated from trichomes of young branches and also of a rich glycoalkaloids total fraction from the green fruits of Solanum crinitum Lam 14 along with its allelopathic activity. 3 This work describes the isolation and structural characterization of the flavonoids tiliroside (1), astragalin (2) (7), cis-(10) and trans-(11) cumaric acids and ethyl cis- (8) and trans-(9) cumarate and 4-hydroxybenzoic acid (12), which were isolated from the trichomes, and the glycoalkaloids solamargine (13), 20-epi-solamargine (14) and solasonine (16) isolated from the green fruits.…”

Section: Introductionmentioning

confidence: 99%

Other chemical constituents isolated from Solanum crinitum Lam. (Solanaceae)

Cornelius

Carvalho

Alves

et al. 2010

J. Braz. Chem. Soc.

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(7), ácido 4-hidroxibenzoico (12), e quatro derivados do ácido cinâmico: cis-e trans-cumárico (10 e 11), cis-e trans-cumarato de etila (8 e 9), isolados de tricomas do fruto. Do extrato metanólico de frutos verdes foram isolados três alcalóides esteroidais glicosilados: solamargina (13), 20-epi-solamargina (14) e solasonina (16). Os derivados 3,5,7,4'-tetra-O-metil-kaempferol (4), 3,7,4'-tri-O-metil-kaempferol (5), 3,7,4'-tri-O-metil-5-Oacetil-kaempferol (6), peracetil-epi-solamargina (15) e peracetil-solasonina (17) foram sintetizados e estão sendo registrados pela primeira vez na literatura. As estruturas foram definidas através de análise de dados espectrométricos.The phytochemical investigation of Solanum crinitum Lam led to the isolation from the fruit trichomes of four flavonoids, tiliroside (1), astragalin (2), kaempferol (3), biochanin A-7- O-b-D-apiofuranosyl-(1→5)-b-D-apiofuranosyl-(1→6)-b-D-glucopyranoside (7), along with 4-hydroxybenzoic acid (12), and four cinnamic acid derivatives, cis-and trans-coumaric acids (10 and 11) and cis-and trans-ethyl coumarate (8 and 9). Three tri-glycosyl-steroidal alkaloids, solamargine (13), 20-epi-solamargine (14) and solasonine (16) were isolated from the methanolic extract of the green fruits. The derivatives 3,5,7,4'-tretra-O-methyl-kaempferol (4), 3,7,4'-tri-O-methyl-kaempferol (5), 3,7,4'-tri-O-methyl-5-O-acetyl-kaempferol (6), the peracetyl-episolamargine (15) and peracetyl-solasonine (17) were prepared. The structures were established through the analysis of their spectral data. The complete 1 H and 13 C NMR data assignments of the new peracetyl derivatives of the alkaloids were made.Keywords: Solanum crinitum, Solanaceae, steroidal glycoalkaloids, flavonoids, cinnamic acids Introduction Solanum (L) is the most representative genus of Solanaceae, containing about 1,500 species, and 5,000 epithets. It is widespread in tropical and subtropical regions of all the world, but its highest diversity occurs in South America. 1 Solanum species are a rich source of steroidal alkaloids, flavonoids and their glycosides which are known to possess a variety of biological activities. The glycoalkaloids are natural toxins with ecological and human health importance, such as the allelopathic effect against herbivores, against pathogenic microorganism 2,3 and molluscicidal activity, 4 and are also of interest as starting material for anabolic, anti-fertility, anti-inflammatory, anti-allergic drugs. 5 As the alkaloids, the flavonoids are a frequent group of compounds in Solanum species, and can be used as systematic markers for the family taxons. [6][7][8] Solanum crinitum Lam (Solanaceae), popularly known as "jurubeba" and "fruto-de-lobo", is a shrub or small tree in South America, including southern Brazil and Colombia. 9,10 In the course of our pharmacological and phytochemical investigations of Solanum species, 3,4,8,[11][12][13] we have reported the cytotoxic and antitumoral activities of flavonoids isolated from trichomes of young branches Other Chemical Constituents Is...

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“…In addition, this trait is related with the coordinated action of morphological, anatomical and biochemical adaptations (Bucher and Kuhlemeier 1993). However root and plant dry matter, SDA Silva et al SDA Silva et al correlated with flooding tolerance, are easily measurable traits, which allows an estimate of flooding tolerance in young maize plants (Dias-Filho and Carvalho 2000, Lizaso et al 2001, Vitorino et al 2001, Dias-Filho 2002.…”

Section: Introductionmentioning

confidence: 99%