In Vivo Evaluation of a Brown Midrib Mutant of Zea Mays L.

Muller, L.D.; Lechtenberg, V. L.; Bauman, L. F.; Barnes, R. F.; Rhykerd, C. L.

doi:10.2527/jas1972.354883x

Cited by 61 publications

(27 citation statements)

References 4 publications

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“…The in vivo digestibility in ruminant animals was also reported to be higher for the bm3 mutant than for wild-type plants (Keith et al, 1979;Muller et al, 1972;Tjardes et al, 2000;Weller and Phipps, 1986), presumably for similar reasons. In an attempt to reveal the nature of the bm3 mutation, Grand et al (1985) 10% of that in wild-type plants.…”

Section: Analysis Of Mutants With Improved Forage Digestibilitymentioning

confidence: 95%

Improvement of biomass through lignin modification

Li¹,

Weng²,

Chapple³

2008

The Plant Journal

368

304

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SummaryLignin, a major component of the cell wall of vascular plants, has long been recognized for its negative impact on forage quality, paper manufacturing, and, more recently, cellulosic biofuel production. Over the last two decades, genetic and biochemical analyses of brown midrib mutants of maize, sorghum and related grasses have advanced our understanding of the relationship between lignification and forage digestibility. This work has also inspired genetic engineering efforts aimed at generating crops with altered lignin, with the expectation that these strategies would enhance forage digestibility and/or pulping efficiency. The knowledge gained from these bioengineering efforts has greatly improved our understanding of the optimal lignin characteristics required for various applications of lignocellulosic materials while also contributing to our understanding of the lignin biosynthetic pathway. The recent upswing of interest in cellulosic biofuel production has become the new focus of lignin engineering. Populus trichocarpa and Brachypodium distachyon are emerging as model systems for energy crops. Lignin research on these systems, as well as on a variety of proposed energy crop species, is expected to shed new light on lignin biosynthesis and its regulation in energy crops, and lead to rational genetic engineering approaches to modify lignin for improved biofuel production.

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Section: Analysis Of Mutants With Improved Forage Digestibilitymentioning

confidence: 95%

Improvement of biomass through lignin modification

Li¹,

Weng²,

Chapple³

2008

The Plant Journal

368

304

View full text Add to dashboard Cite

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“…The in vivo experiments undertaken on lambs by Muller et al (1972) Barrière et al (1985), with results amounting to 10 years of experiments on sheep confirmed a greater intake of bm3 (average 5.3%), an increase in organic matter digestibility (average 3.5%) and a great improvement in cellulose digestibility by an average of 15.6%. Recent studies undertaken by INRA at Lusignan have strengthened and refined these points (Barrière et al, 1993).…”

Section: Lignin Compositionmentioning

confidence: 96%

“…For instance, Helm and Ralph (1991) (1973) found that the bm1 stalks were poorer in AOAC lignin content (sulphuric acid lignin in dry matter). All the subsequent studies performed with normal and bm3 maize plants showed reduced contents of lignin in bm3, regardless of the methods of analysis used Muller et al, 1972;El-Tekriti et al, 1976;Frenchick et al, 1976;Keith et al, 1981;Stallings et al, 1982;Weller et al, 1984;Grand et al, 1985;Gupta et al, 1988;Kasuga, 1989, 1990;Grenet and Barry, 1991;Chabbert et al, 1993aChabbert et al, , 1993bCone and Engels, 1993 Kuc and Nelson (1964) (Chabbert et al, 1993b). …”

Section: Introductionmentioning

confidence: 99%

Brown-midrib genes of maize: a review

1993

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Summary — The efficiency of forage for ruminant animals primarily depends on cell-wall constituent content, mostly cellulose and hemicellulose, and on their digestibility, mostly reduced by lignin incrustration. Four brown-midrib genes (bm1, bm2, bm3 and bm4) have been described in maize. Brown-midrib plants were described as having a lower lignin content than normal genotypes; the ratios of hydroxycinnamic acids released after alkaline hydrolysis, and the ratios between monomeric units released after alkaline nitrobenzene oxidation or thioacidolysis also differed in normal and brown-midrib plants. The bm3 gene, allowing an important decrease of lignin content, and a better improvement in plant digestibility, was also the most studied. When cattle were fed bm3 plants, intake and digestibility were higher compared to normal isogenic ones, and the rate of digestion was also higher. However, the agronomical value of the brown-midrib genotypes was distinctively lower than that of their normal isogenic counterparts and this was particularly notable on the bm3 gene. This observation also appeared to be genotype-specific, suggesting the possibility of producing brown-midrib

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“…Muller, Lechtenberg, Bauman, Barnes and Rhykerd (1972) have reported that the cellulose, hemicellulose and lignin of different strains of maize fodder are responsible for differences in the rate of cellulose digestion in vitro, and that these are associated with voluntary DM intake. The rate of DM and cellulose disappearance was faster in forages of low cellulose content than in those of high cellulose content.…”

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confidence: 99%

A note on forage evaluation for buffalo by various techniques

Kishan

Singh

1978

Anim. Sci.

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The relative efficiency of voluntary consumption, chemical composition, digestibility in vitro and in vivo, was tested for predicting the nutritive value of five forages: berseem (Trifolium alexandrinum); green oat (Avena sativa); oat hay; cow pea (Vigna spp.) and maize (Zea mays). The digestibility coefficients of dry matter (DM), crude protein, acid-detergent lignin and energy were significantly correlated with DM intake. Digestibilities in vitro of DM and cellulose after 12-h incubation were significantly related to digestibilities in vivo of DM and energy. The values for cellulose digestibility in vitro at 24 h were similar to those for digestibility of energy in vivo. Significant correlations were obtained between the crude protein content of forages and the voluntary DM intake and digestibility of nutrients. Increased cellulose and acid-detergent fibre contents were each related with decreased DM intake and digestibility of nutrients.

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In Vivo Evaluation of a Brown Midrib Mutant of Zea Mays L.

Cited by 61 publications

References 4 publications

Improvement of biomass through lignin modification

Improvement of biomass through lignin modification

Brown-midrib genes of maize: a review

A note on forage evaluation for buffalo by various techniques

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