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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...

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The relation of apple texture with cell wall nanostructure studied using an atomic force microscope.

Justyna Cybulska1, Artur Zdunek, Katarzyna M Psonka-Antonczyk

  • 1Institute of Agrophysics, Polish Academy of Sciences, Doswiadczalna 4, 20-290 Lublin, Poland. j.cybulska@ipan.lublin.pl

Carbohydrate Polymers
|December 11, 2012
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Summary

Apple cell wall nanostructure influences texture. Thicker cellulose microfibrils correlate with crisper, harder, and juicier apples, impacting mechanical strength and sensory perception.

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Area of Science:

  • Plant cell wall nanostructure
  • Food science
  • Materials science

Background:

  • Apple texture is a key quality attribute influencing consumer preference.
  • Understanding the relationship between cell wall nanostructure and texture is crucial for apple breeding and processing.

Purpose of the Study:

  • To investigate the relationship between apple cell wall nanostructure and texture across six cultivars.
  • To determine how cellulose microfibril diameter, crystallinity, and pectin content influence apple texture properties.

Main Methods:

  • Atomic Force Microscopy (AFM) was used to image cell wall material (CWM) and cellulose microfibrils.
  • Mean cellulose microfibril diameter was estimated from AFM height topographs.
  • Cellulose microfibril crystallinity and pectin content were quantified.
  • Apple texture was evaluated using both sensory and instrumental analyses.

Main Results:

  • Significant differences in cellulose microfibril diameter were observed among apple cultivars.
  • Cellulose microfibril diameter was found to correlate with pectin content and crystallinity.
  • Cultivars with thicker cellulose microfibrils exhibited enhanced crispness, hardness, and juiciness.
  • Thicker microfibrils were also associated with greater acoustic emission, indicating increased mechanical strength.

Conclusions:

  • Microfibril thickness in apple cell walls is a key determinant of mechanical strength.
  • Cell wall nanostructure, specifically microfibril diameter, directly impacts apple texture and sensory attributes.
  • This research provides insights into the structural basis of apple texture, valuable for quality improvement.