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Plant cell wall fractionation and structural analysis

R W Bailey, A Chesson, J Monro

    The American Journal of Clinical Nutrition
    |October 1, 1978
    PubMed
    Summary
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    Dietary fiber analysis is complex due to plant polysaccharide structures. Many common methods lose significant amounts of pectin, a key fiber component, affecting accurate dietary fiber measurement.

    Area of Science:

    • Plant Biochemistry
    • Food Science
    • Analytical Chemistry

    Background:

    • Dietary fiber comprises major plant polysaccharides.
    • Plant cell wall structure influences fiber analysis.
    • Current analytical methods face challenges in specificity and completeness.

    Purpose of the Study:

    • To review plant polysaccharide structures and their role in dietary fiber.
    • To evaluate common analytical methods for dietary fiber, including alkaline, acidic, and detergent fractionation.
    • To specifically examine the analysis of pectin, a frequently overlooked dietary fiber component.

    Main Methods:

    • Review of existing literature on plant polysaccharide structures and cell wall organization.
    • Description and critical assessment of alkaline, acidic, and detergent fractionation techniques.

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  • Determination of pectin solubility in various common plant foods.

    • Main Results:

    • Significant challenges exist in the accurate analysis of plant polysaccharides in dietary fiber.
    • Pectin, a crucial polyuronide, is often inadequately analyzed.
    • A substantial portion of pectin polyuronide is lost during common analytical procedures due to solubility issues.

    Conclusions:

    • Existing analytical methods for dietary fiber may underestimate total fiber content.
    • Pectin solubility is a critical factor affecting its recovery and accurate quantification.
    • Further refinement of analytical techniques is needed for precise dietary fiber and pectin measurement.