[Microstructural changes in hardened beans (Phaseolus vulgaris)].

Area of Science:

• Agricultural Science
• Food Science
• Materials Science

Context:

• Bean hardening is a major challenge for Phaseolus vulgaris consumption.
• Storage conditions significantly impact bean texture and quality.

Purpose:

• To investigate the microstructural changes in Phaseolus vulgaris beans causing hardening.
• To analyze structural differences in cotyledons and testa using scanning electron microscopy.

Summary:

• Phaseolus vulgaris beans stored at 37°C and 75% RH for 12 months showed a 503% increase in hardness compared to those stored at 5°C and 34% RH.
• Microstructural analysis revealed altered cell walls, intercellular spaces, and protein matrix in cotyledons, along with changes in testa compaction in hardened beans.
• Cooked hardened beans exhibited less separation of cotyledon cells compared to soft beans.

Impact:

• Understanding these structural changes is crucial for developing strategies to mitigate bean hardening.
• This research provides insights into the cellular mechanisms underlying Phaseolus vulgaris bean texture modification.
• Findings can inform post-harvest storage and processing techniques to maintain bean quality for consumers.