Impact of storage environment on respiration, dry matter losses and fumonisin B 1 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 |
|---|---|
| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wageningen Academic Publishers
2017
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.3920/wmj2017.2237 https://www.wageningenacademic.com/doi/pdf/10.3920/WMJ2017.2237 |
| 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. |
|---|