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Related Experiment Videos

Cell wall changes in immature Asparagus stem tissue after excision.

K W Waldron1, R R Selvendran

  • 1AFRC Institute of Food Research, Norwich Research Park, Colney, U.K.

Phytochemistry
|June 1, 1992
PubMed
Summary

Asparagus cell wall polymers change during storage, with decreases in pectin and arabinan, and increases in xylan. These findings offer insights into plant cell wall structure and lignification.

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Area of Science:

  • Plant Biochemistry
  • Cell Wall Biology
  • Agricultural Science

Background:

  • Asparagus (Asparagus officinalis) cell wall material (CWM) composition changes with storage.
  • Understanding these changes is crucial for post-harvest quality and processing.

Purpose of the Study:

  • To analyze the changes in cell wall polymers during aerobic storage of asparagus.
  • To investigate the structural heterogeneity of asparagus cell wall polysaccharides.

Main Methods:

  • Solubilization of polymers from CWM using sequential extraction (CDTA, Na2CO3, KOH).
  • Fractionation of polymers via anion-exchange chromatography.
  • Methylation analysis to determine polysaccharide structures.

Main Results:

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  • Storage led to decreased levels of pectin (galactan) and arabinan in various fractions.
  • An increase in xylan was observed, particularly in pectic polysaccharide-xylan complexes.
  • Heterogeneity was revealed in pectic polysaccharides, pectic polysaccharide-xylan complexes, and xyloglucans associated with xylans.

Conclusions:

  • Aerobic storage alters asparagus cell wall polysaccharide composition, affecting pectin and xylan content.
  • Complexes of pectic polysaccharides, xylans, and phenolic compounds may be involved in lignification processes.
  • The study highlights the structural complexity of asparagus cell walls and their dynamic nature.