Chemical syntheses of caffeoyl and 5-OH coniferyl aldehydes and alcohols and determination of lignin O-methyltransferase activities in dicot and monocot species

被引：26

作者：

Chen, F ^{[1
]}

Kota, P ^{[1
]}

Blount, JW ^{[1
]}

Dixon, RA ^{[1
]}

机构：

[1] Samuel Roberts Noble Fdn Inc, Div Plant Biol, Ardmore, OK 73401 USA

来源：

PHYTOCHEMISTRY | 2001年 / 58卷 / 07期

关键词：

Medicago sativa; Medicago truncatula; Nicotiana tabacum; Triticum aestivum; Festuca arundinacea; Leguminosae; Solanaceae; Gramineae; syntheses; caffeoyl aldehyde; 5-hydroxyconiferaldehyde; O-methyltransferase; lignin;

D O I：

10.1016/S0031-9422(01)00391-0

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

To investigate the substrate preferences of O-methyltransferases in the monolignol biosynthetic pathways, caffeoyl and 5-hydroxy coniferyl aldehydes were synthesized by a new procedure involving a Wittig reaction with the corresponding hydroxybenzaldehydes. The same procedure can also be used to synthesize caffeoyl and 5-hydroxyconiferyl alcohols. Relative O-methyltransferase activities against these substrates were determined using crude extracts and recombinant caffeic acid O-methyltransferase from alfalfa (Medicago sativa), and crude extracts from the model legume Medicago truncatula, tobacco, wheat and tall fescue. Extracts from all these species catalyzed methylation of the various monolignol aldehydes and alcohols more effectively than the corresponding hydroxycinnamic acids. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1035 / 1042

页数：8

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