Send to:

Choose Destination
See comment in PubMed Commons below
Theor Appl Genet. 1999 Aug;99(3-4):705-10. doi: 10.1007/s001220051287.

Average effect of a mutation in lignin biosynthesis in loblolly pine.

Author information

  • 1Forest Biotechnology Group and Department of Forestry, North Carolina State University, NC 27695, Raleigh, USA, US,


Cinnamyl alcohol dehydrogenase (CAD, E.C. is a monolignol biosynthetic enzyme that catalyzes the final step of lignin subunit biosynthesis in higher plants. Recently, a mutant allele of the cad gene, cad-n1, encoding for the CAD enzyme, was discovered in loblolly pine. By reducing the expression of the cad gene, this mutant has a decreased lignin content and major changes in the lignin composition in wood. In this study, we found that the substitution of a wild-type allele by cad-n1 was associated with a significant effect on 2nd-year shoot elongation in a half-sib family of loblolly pine (designated family 7-1037). The average effect of cad-n1 appeared to increase with tree growth and was greater for stem radial growth than height growth. An increase of 14.1% in de-barked volume in year 4 was associated with cad-n1. Co-segregation analysis indicated that the cad locus itself might represent a gene that governs stem growth in pine. The significance of the mutation cad-n1 for tree growth and wood processing is discussed.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Springer
    Loading ...
    Write to the Help Desk