Manipulating the phenolic acid content and digestibility of Italian ryegrass (Lolium multiflorum) by vacuolar targeted expression of a fungal ferulic acid esterase

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dc.contributor.author Langdon, Tim
dc.contributor.author Hauck, Barbara D.
dc.contributor.author Morris, Phillip
dc.contributor.author Buanafina, Marcia M. de O.
dc.contributor.author Dalton, Sue J.
dc.date.accessioned 2009-07-15T13:40:39Z
dc.date.available 2009-07-15T13:40:39Z
dc.date.issued 2009-07-15
dc.identifier.citation Langdon , T , Hauck , B D , Morris , P , Buanafina , M M O & Dalton , S J 2009 , ' Manipulating the phenolic acid content and digestibility of Italian ryegrass (Lolium multiflorum) by vacuolar targeted expression of a fungal ferulic acid esterase ' Applied Biochemistry and Biotechnology , pp. 1-3 . en
dc.identifier.other PURE: 120302
dc.identifier.other dspace: 2160/2644
dc.identifier.uri http://hdl.handle.net/2160/2644
dc.description Buanafina, M. M. de O., Langdon, T., Hauck, B. D., Dalton, S. J., Morris, P. (2006).. Manipulating the phenolic acid content and digestibility of Italian ryegrass (Lolium multiflorum) by vacuolar targeted expression of a fungal ferulic acid esterase. Applied Biochemistry and Biotechnology, 130(1-3), 415-426. en
dc.description.abstract In grass cell walls, ferulic acid esters linked to arabinosyl residues in arabinoxylans play a key role in crosslinking hemicellulose. Although such crosslinks have a number of important roles in the cell wall, they also hinder the rate and extent of cell wall degradation by ruminant microbes and by fungal glycohydrolyase enzymes. Ferulic acid esterase (FAE) can release both monomeric and dimeric ferulic acids from arabinoxylans making the cell wall more susceptible to further enzymatic attack. Transgenic plants of Lolium multiflorum expressing a ferulic acid esterase gene from Aspergillus niger, targeted to the vacuole under a constitutive rice actin promoter, have been produced following microprojectile bombardment of embryogenic cell cultures. The level of FAE activity was found to vary with leaf age and was highest in young leaves. FAE expression resulted in the release of monomeric and dimeric ferulic acids from cell walls on cell death and this was enhanced severalfold by the addition of exogenous ¿-1,4-endoxylanase. We also show that a number of plants expressing FAE had reduced levels of cell wall esterified monomeric and dimeric ferulates and increased in vitro dry-matter digestibility compared with nontransformed plants. en
dc.format.extent 3 en
dc.language.iso eng
dc.relation.ispartof Applied Biochemistry and Biotechnology en
dc.title Manipulating the phenolic acid content and digestibility of Italian ryegrass (Lolium multiflorum) by vacuolar targeted expression of a fungal ferulic acid esterase en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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