Ferulic acid is bound to the primary cell walls of all gymnosperm families

被引:55
作者
Carnachan, SM [1 ]
Harris, PJ [1 ]
机构
[1] Univ Auckland, Sch Biol Sci, Auckland 1, New Zealand
关键词
gymnosperms; gnetales; primary cell walls; phenolic acids; hydroxycinnamic acids; ferulic acid; beta-coumaric acid; UV fluorescence microscopy; biochemical systematics;
D O I
10.1016/S0305-1978(00)00009-0
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
Unlignified primary cell walls containing ester-linked ferulic acid fluoresce blue in ultraviolet radiation which changes to green with increased intensity on treatment with ammonium hydroxide. Using this fluorescence behaviour, we detected ester-linked ferulic acid in the primary cell walls of all 41 species of gymnosperms we examined. These species were in 17 families representing all four extant classes of gymnosperms. In addition, we obtained cell-wall preparations containing > 95% primary cell walls from nine gymnosperm species in nine families, representing all four extant classes. These preparations were analysed for ester-linked monomeric phenolic acids. We found ferulic acid (mostly trans) (88-1,561 mu g/g cell walls) in all of the preparations and p-coumaric acid (mostly trans) (0-106 mu g/g cell walls) in all except one of them. Ferulic acid ester-linked to primary cell walls has previously been found in angiosperms: in the commelinoid monocotyledons and in the dicotyledon order Caryophyllales, both monophyletic groups. From the present results, we postulate that the extant classes of gymnosperms are monophyletic and no class is sister to the angiosperms. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:865 / 879
页数:15
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