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Cell wall composition of vascular and parenchyma tissues in broccoli stems

✍ Scribed by S Müller; WG Jardine; BW Evans; RJ Viëtor; CE Snape; MC Jarvis

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
85 KB
Volume
83
Category
Article
ISSN
0022-5142

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✦ Synopsis

Abstract

Broccoli stems can become tough and stringy owing to excessive development of the vascular ring. Thickened cell walls from the vascular ring were isolated and their composition was determined. They were derived principally from anatomically recognisable xylem vessels, fibres and tracheids but contained an assemblage of polysaccharides typical of primary cell walls. Their pectin content was particularly high and they contained only 6% lignin as estimated by solid state ^13^C NMR spectroscopy. They did not differ markedly in composition from parenchyma cell walls within the same stems. Thus, despite their thickness and anatomical appearance, these cell walls resembled the walls of non‐woody cells in their polymer composition. Copyright © 2003 Society of Chemical Industry

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