The mechanical properties of xylem tissue from tobacco plants (Nicotiana tabacum 'Samsun')

被引：29

作者：

Hepworth, DG ^{[1
]}

Vincent, JFV ^{[1
]}

机构：

[1] Univ Reading, Ctr Biomimet, Reading RG6 6AT, Berks, England

来源：

ANNALS OF BOTANY | 1998年 / 81卷 / 06期

基金：

英国生物技术与生命科学研究理事会;

关键词：

tobacco; Nicotiana tabacum; xylem tissue; Young's modulus; matrix polymer connectivity; plant biomechanics;

D O I：

10.1006/anbo.1998.0631

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Tobacco plants (Nicotiana tabacum 'Samsun') have been grown with an antisense CAD (cinnamyl alcohol dehydrogenase) gene. This modifies lignin production, resulting in lignin with a greater aldehyde content which is easier to extract chemically. This lignin probably has a reduced crosslink density. The changed properties of the lignin affect the longitudinal tensile modulus of the xylem tissue (wood), reducing it by one third, from 2.8 GPa to 1.9 Gpa. Tobacco xylem tissue cell walls are more sensitive to changes in the properties of the matrix than can be predicted using current cell wall mechanical models. (C) 1998 Annals of Botany Company.

引用

页码：751 / 759

页数：9