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Related Experiment Video

Updated: Jun 15, 2026

Sequencing of Plant Wall Heteroxylans Using Enzymic, Chemical (Methylation) and Physical (Mass Spectrometry, Nuclear Magnetic Resonance) Techniques

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Published on: March 24, 2016

Hemicelluloses.

Henrik Vibe Scheller¹, Peter Ulvskov

¹Feedstocks Division, Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, California 94608, USA. hscheller@lbl.gov

Annual Review of Plant Biology

|March 3, 2010

Summary

This summary is machine-generated.

Hemicelluloses are key plant cell wall polysaccharides. Their structures and roles in cell wall strength vary, and while some biosynthesis pathways are known, others remain largely mysterious.

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Published on: June 20, 2010

Area of Science:

Plant biology
Biochemistry
Cell wall structure

Background:

Hemicelluloses are essential polysaccharides in plant cell walls, characterized by beta-(1-->4)-linked backbones.
They encompass xyloglucans, xylans, mannans, glucomannans, and beta-(1-->3,1-->4)-glucans, found in most terrestrial plants.
Their structure and abundance differ significantly across species and cell types, playing a crucial role in cell wall integrity.

Purpose of the Study:

To review the structural diversity and biological roles of hemicelluloses in plant cell walls.
To discuss the synthesis of hemicelluloses, focusing on known and unknown glycosyltransferase pathways.
To highlight the current challenges and unanswered questions in hemicellulose biosynthesis research.

Main Methods:

Literature review of existing research on hemicellulose structure, function, and biosynthesis.
Analysis of established models of primary plant cell walls.
Synthesis of current understanding regarding glycosyltransferases involved in hemicellulose production.

Main Results:

Hemicelluloses significantly strengthen plant cell walls through interactions with cellulose and lignin.
Biosynthesis pathways for xyloglucans and mannans are relatively well-understood, with known glycosyltransferases.
The biosynthesis of xylans and beta-(1-->3,1-->4)-glucans remains poorly understood, with ongoing research posing more questions.

Conclusions:

Hemicelluloses are vital for plant cell wall structure and strength, with diverse forms and functions.
Significant gaps exist in understanding the biosynthesis of certain hemicellulose types, particularly xylans and beta-(1-->3,1-->4)-glucans.
Further research is needed to elucidate the complex enzymatic machinery underlying hemicellulose synthesis.