Double-Sugar Gum: ArborGen modified eucalyptus trees release 2X sugars for biofuels conversion

May 6, 2011 |

In Washington state, researchers from the U.S. National Renewable Energy Laboratory announced that lignin-modified Eucalyptus trees developed by ArborGen releases more than twice the usual amount of sugar, making it a promising option as a biomass feedstock for liquid fuel. Using plant biotechnology the modifications were made at two points in the lignin biosynthetic pathway, with the largest increase in sugar release coming from cinnamate-4-hydroxylase (C4H) down-regulation.

Scientists from NREL have characterized the C4H lines as containing half the lignin of the unmodified lines.  Using a high throughput sugar release assay developed at NREL (Selig et al, 2011 Biotech. Letters 1-7), the modified lines were found to release up to 99 percent of their sugars, up from 40 percent in the non-modified plants.

Although some “low recalcitrance” plant lines suffer from reduced growth, many of the C4H down-regulated lines from the E. grandis x E.  urophylla cross grow well.  C4H lines have an estimated biomass productivity of ten dry-tons per acre per year, with the potential to produce about 1,000 gallons of liquid biofuels per acre.

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Category: Research

Comments (3)

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  1. sir
    This is fantastic news. but can we get the permission for planting
    ..ican source for 10000acres before 2012
    we are ready
    with best regards

  2. balaji says:

    Respected Sir,

    Please tell us the way to manufacture more no of seedlings through tissue culture to meet the heavy demand for such varieties.We here have a tc lab for Musa paradisica.Please help us to plant more saplings for increased biodiesel yield.

    Thanking you,

    Your truly,