Degradação ruminal dos tecidos vegetais e composição bromatológica de cultivares de Axonopus scoparius (Flüegge) Kuhlm. e Axonopus fissifolius (Raddi) Kuhlm

Lima, Lenir Maristela Silva; Alquini, Yedo; Brito, Cláudio José Freixeiro Alves de; Deschamps, Fernando

doi:10.1590/s0103-84782001000300025

Cited by 9 publications

(7 citation statements)

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“…In a parental of giant missionary grass, Axonopus scoparius, the maturity of cultivars decreased the degradability of the forage, which was related to cell wall thickening and increased lignifi ed tissue area (LIMA et al, 2001). Dynamics of lignifi cation in cell walls can indicate the quality of forage plants, and many authors have linked the increase of tissue lignifi cation as a result of maturity and management effects, as cutting and fertilization of grass, with a consequent decrease of the digestibility of forages to ruminants (ALVES DE BRITO et al, 1999).…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate the tissue proportion and the chemical composition of the leaves, three samples of leaves were taken in each plot of the one block, in September 15 th of 2008. The sampling method is commonly used in anatomical studies, in which the samplers constitute the replications and the experimental design is considered as completely randomized (LIMA et al, 2001). Leaves were sampled when the plants were in vegetative stage and 83 days of regrowth.…”

Section: Methodsmentioning

confidence: 99%

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Leaf tissues proportion and chemical composition of Axonopus jesuiticus x A. scoparius as a function of pig slurry application

et al. 2013

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This study aimed to evaluate the chemical and anatomical attributes of leaves of giant missionary grass to application of 0, 62, 124, 186, 248 and 310m³ ha-1 of pig slurry. At 83 days after the last application of fertilizer, the leaf blades were collected, fixed in FAA 70%, sectioned, stained, photographed and digitalized. The transversal section of leaf blades were evaluated for proportion of epidermis, lignified vascular tissue + sclerenchyma, non-lignified vascular tissue and parenchyma with an image-processing system calibrated to 1mm pixel-1. Leaf samples were analyzed for crude protein, acid detergent fiber, neutral detergent fiber and hemicellulose content by near infrared reflectance spectroscopy. The pig slurry application up to 310m³ ha-1 significantly increased the percentage of crude protein, parenchyma, epidermis, non-lignified vascular tissue and hemicellulose, while decreasing the percentage of acid detergent fiber and lignified vascular tissue + sclerenchyma. The Pearson's correlation was positive between crude protein and non-lignified vascular tissue, and between acid detergent fiber and lignified vascular tissue + sclerenchyma. The percentage of hemicellulose was positively correlated with epidermis, parenchyma and non-lignified vascular tissue. A negative correlation between acid detergent fiber and epidermis, parenchyma and non-lignified vascular tissue was observed.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Leaf tissues proportion and chemical composition of Axonopus jesuiticus x A. scoparius as a function of pig slurry application

et al. 2013

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“…A porcentagem de desaparecimento da FDN e da MS foi mais acentuado até, aproximadamente, 24 e 48h de incubação, respectivamente, com um discreto acréscimo nos tempos subsequentes (Tabela 3), sustentando a escolha do tempo de 48h para a incubação dos tecidos in situ, a fim de estudar sua degradação anatômica, o mesmo tempo foi utilizado nos estudos realizados in situ por Lima et al (2001) e in vitro por Paciullo et al (2002 …”

Section: Resultsunclassified

“…Os cinco conjuntos foram acondicionados em uma sacola de náilon apropriada para ensaios de degradabilidade in situ. Utilizou-se esta forma de proteção a fim de evitar que a pressão exercida pelos movimentos do rúmen fragmentasse as amostras de acordo com Lima et al (2001) (WILCOX et al, 2002). Foram feitas determinações da espessura da parede celular das células de esclerênquima (μm), espessura da cutícula (μm) e número e área transversal ocupada por fibras esclerenquimáticas (μm 2 ).…”

Section: Methodsunclassified

Anatomia e cinética de degradação do feno de Manihot glaziovii

França

Guim

Batista

et al. 2010

Acta Sci. Anim. Sci.

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RESUMO.Avaliaram-se a composição química, o teor de compostos secundários, a degradabilidade in situ, a anatomia e a degradabilidade dos tecidos do feno de maniçoba, a partir de plantas em início de frutificação, oriundas de uma vegetação de caatinga em Ibimirim, Estado do Pernambuco. O caule apresentou células com variados graus de lignificação, destacando-se a presença de fibras gelatinosas, parênquima medular lignificado e espessas paredes celulares no xilema. As folhas se destacam pela presença da estrutura girder, caracterizam-se pela grande quantidade de mesofilo, constituído por células com paredes delgadas, contribuindo para a degradabilidade de matéria seca. Idioblastos contendo drusas de oxalato foram encontrados nos tecidos vasculares, na nervura principal da folha. Eles funcionam como mecanismos de defesa do vegetal contra herbívoros e podem afetar a disponibilidade de minerais para o animal. O feno de maniçoba, apesar de obtido de planta em avançado estágio de maturidade (início da frutificação), possui adequada composição química e baixos teores de ácido cianídrico e taninos. Os principais limitantes à degradabilidade são o espessamento e a lignificação das paredes celulares, especialmente nos tecidos do caule. Adicionalmente, os diversos aspectos aqui relatados induzem à continuidade de pesquisas em diversos focos e visam ao melhoramento e à utilização desta espécie como forrageira.Palavras-chave: parede celular, lignina, microscopia vegetal, digestibilidade, forrageira nativa. ABSTRACT. Anatomy and kinetics of degradation of Manihot glazioviiHay. This study the structural components of cell wall with its degradability, chemical composition, secondary compounds, in situ degradability, anatomy and tissue degradability of the hay of "maniçoba" (wild cassava) from plants in early fruiting, from savanna vegetation in Ibimirim, Pernambuco. The stem showed cells with varied degrees of lignification, highlighting the presence of gelatinous fibers, lignified pith parenchyma and thick cell walls inside the xylem. The leaves were highlighted by the presence of a girder structure, characterized by the great quantity of mesophyll, constituted by cells with thin walls, contributing to the degradability of dry matter. Idioblasts with druses of oxalate were observed around the vascular tissues, in the midrib. It works like defense mechanisms of plant against herbivores and can affect the availability of minerals for animals. "Maniçoba" hay, in spite of its advanced maturity stage (early fruit development), presents adequate chemical composition and low concentration of cianidric acid and tannins. The mains limits to degradability are cell wall thickness and lignification, particularly in stem tissue. Additionally, several aspects reported here induce to the continuity of studies in several focuses and aim to improve the use this specie as forage.Key words: cell wall, lignin, plant microscopy, digestibility, native forage. IntroduçãoA vegetação nativa do semiárido brasileiro possui grande biodiversidade em seu ex...

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“…The digestibility of a forage is closely related to the arrangement of tissues and their bromatologic composition (Lima et al, 2001), as well as the different types and percentages of tissues, organs and age of the plant, allowing differentiation of these nutritional plants (Brito et al, 1997;Soffiatti & Angyalossy, 2003).…”

Section: Introductionmentioning

confidence: 99%

Qualitative and anatomical characteristics of tree-shrub legumes in the Forest Zone in Pernambuco state, Brazil

Silva

Santos

Lira³

et al. 2012

R. Bras. Zootec.

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-The objective of this study was to characterize the nutritional value of forage legumes Mimosa caesalpiniifolia (Benth.), Bauhinia cheilantha (Bong.) and Leucaena leucocephala (Lan.) and evaluate the anatomy of plants incubated and not incubated in the rumen. The experiment was conducted from September 2007 to November 2008. The experimental plot consisted of three useful plants, totaling three plots per block, and four repetitions. Plants were cut at 1 m height at intervals of 70 days; samples of leaf plus stem with a diameter smaller than 4 mm were collected for determination of dry matter, crude protein, neutral detergent fiber, acid detergent fiber, insoluble protein bound to acid detergent fiber and in vitro dry matter digestibility. The anatomical characterization occurred through the analysis of the proportion of plant tissue nonincubated and incubated in the rumen for a period of 48 hours. The legumes had high crude protein, with an average of 26.1% to Leucena, 22.4% to Sabiá and 18.5% to Mororó, and low levels of in vitro digestibility of dry matter, with an average of 47.3% to Leucena, 42.8% to Mororó and 37.2% to Sabiá. In the leaf blade of Sabiá plants, much lignified tissues that differed from plants of Leucena and Mororó were observed. The degradation process was more visible in the leaves of the Leucena, Sabiá and Mororó plants. The degradation was more pronounced in the spongy parenchyma, leaving the incubated material intact. The average proportion of the epidermis in the incubated and not incubated leaves was 15.8 and 16.4% in Leucena, 16.8 and 19.2% in Mororó and 27.2 and 25.5% in Sabiá, respectively. There are differences in the digestion and nutritional value of leaf tissues of the evaluated legumes.

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Degradação ruminal dos tecidos vegetais e composição bromatológica de cultivares de Axonopus scoparius (Flüegge) Kuhlm. e Axonopus fissifolius (Raddi) Kuhlm

Cited by 9 publications

References 20 publications

Leaf tissues proportion and chemical composition of Axonopus jesuiticus x A. scoparius as a function of pig slurry application

Leaf tissues proportion and chemical composition of Axonopus jesuiticus x A. scoparius as a function of pig slurry application

Anatomia e cinética de degradação do feno de Manihot glaziovii

Qualitative and anatomical characteristics of tree-shrub legumes in the Forest Zone in Pernambuco state, Brazil

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