Abnormal lignin in a loblolly pine mutant
Abnormal lignin in a loblolly pine mutant
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DOI：
10.1126/science.277.5323.235
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发表时间：
1997-07-11
期刊：
影响因子：
56.9
通讯作者：
Sederoff, RR
中科院分区：
文献类型：
--
作者：
Ralph, J;MacKay, JJ;Sederoff, RR
在火炬松（Pinus taeda L.）肉桂醇脱氢酶（E. C. 1.1.1.195），其将松柏醛转化为松柏醇，松柏醇是松树中的主要木质素前体。二氢大麻酚是一种通常与木质素生物合成途径无关的单体，是突变体木质素的主要成分，占单位的30%（与正常松树中的3%相比）。醛类，包括新的2-甲氧基苯甲醛的水平也增加。突变松树生长正常，表明即使在一个物种内，广泛的变化，木质素组成不需要破坏木质素的基本功能。
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. Dihydrocbniferyl alcohol, a monomer not normally associated with the lignin biosynthetic pathway, is the major component of the mutant's lignin, accounting for similar to 30 percent (versus similar to 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.