Impact of storage environment on respiration, dry matter losses and fumonisin B1 contamination of stored paddy and brown rice
The objective of this study was to compare the effect of different storage moisture conditions (0.90 and 0.95 water activity, a w ) and temperatures (25, 30 °C) on (1) respiration rates (CO 2 R), (2) dry matter loss (DML) of paddy and brown rice, (3) inoculation of both rice types with Fusarium vert...
Published in: | World Mycotoxin Journal |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Brill
2017
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Subjects: | |
Online Access: | http://dx.doi.org/10.3920/wmj2017.2237 https://brill.com/view/journals/wmj/10/4/article-p319_3.xml https://brill.com/downloadpdf/journals/wmj/10/4/article-p319_3.xml |
Summary: | The objective of this study was to compare the effect of different storage moisture conditions (0.90 and 0.95 water activity, a w ) and temperatures (25, 30 °C) on (1) respiration rates (CO 2 R), (2) dry matter loss (DML) of paddy and brown rice, (3) inoculation of both rice types with Fusarium verticillioides under these storage conditions on R, DML, and (4) effects on fumonisin B 1 (FB 1 ) contamination of these rice types. There was an increase in temporal CO 2 production with wetter and warmer conditions in naturally contaminated rice. Higher R and consequently, percentage (%) DML were generally observed for brown rice (up to 21%) while in paddy rice this was only up to 3.5% DML. The FB 1 production in paddy rice was low and similar in all treatments regardless of a w × temperature conditions. In the dehusked brown rice there were higher levels of contamination with FB 1, with a maximum at 0.95 a w and 25 °C. A significant correlation between %DMLs and FB 1 contamination was obtained (R=0.7454, P <0.01). These results suggest that monitoring of CO 2 may provide an early indication of fungal activity in moist rice and help in evaluating the relative risk of spoilage and potential for mycotoxin contamination. |
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