Effects of Moisture Mobility on Qiuhong Plum during Storage
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Abstract:
Moisture mobility during fruit storage directly affected the storage quality of fruit and the moisture mobility regularity and mechanism in different storage temperature were distinct. To explore the effects of moisture mobility on the quality of plum, the moisture modility of Qiuhong plum in different temperature (0 ℃, 4 ℃, 10 ℃, 20 ℃) during storage was determined by low field nuclear magnetic resonance (NMR) technology and the microscopic process for the moisture dynamic variation was studied. Combined with texture analyzer, the skin hardness, pulp hardness and adhesiveness were determined and the correlation was analyzed. The results showed that in lower storage temperature, the moisture content, vacuoles water and texture quality of plum reduced more slowly. Compared with 10 ℃ and 20 ℃, stored in lower temperature, cell wall and cytoplasm water appeared special peak and nadir respectively, which maybe the key point to the effect of low temperature on plum quality. Cell wall water presented no significant correlation with the texture of plum (p>0.05); in lower storage temperature, cytoplasm water presented a significantly negative correlation with the skin hardness and pulp hardness (p<0.05), vacuoles water presented a significantly positive correlation with the skin hardness, pulp hardness and adhesiveness (p<0.05); both cytoplasm water and vacuoles water presented no significant correlation with pulp adhesiveness in 10 ℃ and 20 ℃ (p>0.05).
