Abnormal Lignin in a Loblolly Pine Mutant-Reference-Cited by-同舟云学术

Abnormal Lignin in a Loblolly Pine Mutant

Published:1997-07-11 Issue:5323 Volume:277 Page:235-239
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Ralph John¹²³⁴⁵,MacKay John J.¹²³⁴⁵,Hatfield Ronald D.¹²³⁴⁵,O'Malley David M.¹²³⁴⁵,Whetten Ross W.¹²³⁴⁵,Sederoff Ronald R.¹²³⁴⁵

Affiliation:

1. J. Ralph, U.S. Dairy Forage Research Center, U.S. Department of Agriculture (USDA)–Agricultural Research Service (ARS), Madison, WI 53706–1108, and Department of Forestry, University of Wisconsin, Madison, WI 53706–1598, USA.

2. J. J. MacKay, Department of Genetics, North Carolina State University (NCSU), Raleigh, NC 27695–7614, USA.

3. R. D. Hatfield, U.S. Dairy Forage Research Center, USDA-ARS, Madison, WI 53706–1108, USA.

4. D. M. O'Malley and R. W. Whetten, Department of Forestry, NCSU, Raleigh, NC 27695–8008, USA.

5. R. R. Sederoff, Department of Genetics, NCSU, Raleigh, NC 27695–7614 and Department of Forestry, NCSU, Raleigh, NC 27695–8008, USA.

Abstract

Novel lignin is formed in a mutant loblolly pine ( Pinus taeda L.) severely depleted in cinnamyl alcohol dehydrogenase (E.C. 1.1.1.195), which converts coniferaldehyde to coniferyl alcohol, the primary lignin precursor in pines. Dihydroconiferyl alcohol, a monomer not normally associated with the lignin biosynthetic pathway, is the major component of the mutant's lignin, accounting for ∼30 percent (versus ∼3 percent in normal pine) of the units. The level of aldehydes, including new 2-methoxybenzaldehydes, is also increased. The mutant pines grew normally indicating that, even within a species, extensive variations in lignin composition need not disrupt the essential functions of lignin.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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