Reduced wood stiffness and strength, and altered stem form, in young antisense 4CL transgenic poplars with reduced lignin contents Public Deposited

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  • • Reduced lignin content in perennial crops has been sought as a means to improve biomass processability for paper and biofuels production, but it is unclear how this could affect wood properties and tree form. • Here, we studied a nontransgenic control and 14 transgenic events containing an antisense 4-coumarate:coenzyme A ligase (4CL) to discern the consequences of lignin reduction in poplar (Populus sp.). During the second year of growth, trees were grown either free-standing in a field trial or affixed to stakes in a glasshouse. • Reductions in lignin of up to 40% gave comparable losses in wood strength and stiffness. This occurred despite the fact that low-lignin trees had a similar wood density and up to three-fold more tension wood. In free-standing and staked trees, the control line had twice the height for a given diameter as did low-lignin trees. Staked trees had twice the height for a given diameter as free-standing trees in the field, but did not differ in wood stiffness. • Variation in tree morphogenesis appears to be governed by lignin · environment interactions mediated by stresses exerted on developing cells. Therefore our results underline the importance of field studies for assessing the performance of transgenic trees with modified wood properties.
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  • Voelker, S. L., B. Lachenbruch, F. C. Meinzer, and S. H. Strauss. 2011. Reduced wood stiffness and strength, and altered stem form, in young antisense 4CL transgenic poplars with reduced lignin contents. New Phytologist 189:1096-1109
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  • description.provenance : Submitted by Barbara Lachenbruch (barb.lachenbruch@oregonstate.edu) on 2011-12-14T23:30:52Z No. of bitstreams: 3 Voelker_11_NP_TransgenBiomechLOW.pdf: 2323718 bytes, checksum: a29fa9c1f759847274343a49d3b12c6c (MD5) license_rdf: 19977 bytes, checksum: 9b906c3236d4c21f75a26a164fe0d6f3 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2011-12-16T17:10:48Z (GMT) No. of bitstreams: 3 license_rdf: 19977 bytes, checksum: 9b906c3236d4c21f75a26a164fe0d6f3 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Voelker_11_NP_TransgenBiomechLOW.pdf: 2323718 bytes, checksum: a29fa9c1f759847274343a49d3b12c6c (MD5)
  • description.provenance : Made available in DSpace on 2011-12-16T17:10:48Z (GMT). No. of bitstreams: 3 license_rdf: 19977 bytes, checksum: 9b906c3236d4c21f75a26a164fe0d6f3 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Voelker_11_NP_TransgenBiomechLOW.pdf: 2323718 bytes, checksum: a29fa9c1f759847274343a49d3b12c6c (MD5) Previous issue date: 2011

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