Abstract
Highlights Rice kernel physical integrity diminished at higher storage temperature and moisture content. Variation in rice kernel physical integrity was noticeable among rice cultivars. Fungal attack lessened rice kernel physical integrity. Abstract . Rice kernel physical integrity directly correlates with rice milling yield and quality. In this study, the impact of storage conditions on rice kernel physical integrity was examined by assessing changes in head rice yield (HRY) and kernel microstructure. Long-grain hybrid (XL753), long-grain pureline (Roy J), and medium-grain (Titan) rice were stored at different storage moisture contents (16% and 21% MCs, wet basis), storage temperatures (20°C, 30°C, and 40°C), and storage durations (4, 8, 12, and 16 weeks); the samples were also treated with antifungals, sodium chloride, and natamycin. Results show that kernel physical integrity was highly dependent on the rice storage environment. At the same storage conditions, the physical integrity of medium-grain cultivar was significantly higher than that for the two long-grains. Generally, the long-grain hybrid rice exhibited more resilience to breakage than pureline under the same storage conditions. An average of 4% reduction in HRY was seen for the three cultivars when 16% MC rice was stored at 40°C compared to at 20°C; however, the HRY reduction was 12% for rice stored at the highest MC (21%). Decreases in kernel physical integrity were also associated with unique microstructural changes in rice kernels. Sodium chloride treatment of rice kernels significantly and negatively impacted their physical integrity during storage compared to natamycin treatment and untreated control samples. Multiple regression models, developed for each cultivar were applicable for predicting changes in rice kernel physical integrity as a function of studied storage conditions and antifungal treatments. Keywords: Antifungal treatment, Head rice yield, Microstructure, Milled rice quality, Storage, Rice kernel physical integrity.
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Claims 8
Claim · model-written summary
Higher storage temperature and moisture diminished rice kernel integrity.
- Taxon
- Rice
Oryza sativae0 - Treatment
- higher storage temperature and moisture contente0
- Outcome
- Rice kernel physical integritye0
- Direction
- diminishede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice kernel physical integrity diminished at higher storage temperature and moisture content”
Claim · model-written summary
Medium-grain rice had significantly higher physical integrity than the two long-grain cultivars.
Verbatim
e0“At the same storage conditions, the physical integrity of medium-grain cultivar was significantly higher than that for the two long-grains”
Claim · model-written summary
Long-grain hybrid rice resisted breakage more than pureline rice.
- Taxon
- riceOryza sativae0
- Material
- long-grain hybride0
- Outcome
- resilience to breakagee0
- Direction
- moree0
- Comparator
- purelinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the long-grain hybrid rice exhibited more resilience to breakage than pureline under the same storage conditions”
Claim · model-written summary
At 16% moisture, storage at 40°C reduced head rice yield by 4% versus 20°C.
- Taxon
- riceOryza sativae0
- Treatment
- stored at 40°Ce0
- Outcome
- HRYe0
- Direction
- reductione0
- Value
- 4%e0
- Qualifier
- 16% MCe0
- Comparator
- at 20°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An average of 4% reduction in HRY was seen for the three cultivars when 16% MC rice was stored at 40°C compared to at 20°C”
Claim · model-written summary
At 21% moisture, head rice yield fell 12% under the highest-temperature storage comparison.
- Taxon
- riceOryza sativae0
- Treatment
- stored at 40°Ce1
- Outcome
- HRYe0
- Direction
- reductione0
- Value
- 12%e0
- Qualifier
- 21%e0
- Comparator
- at 20°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the HRY reduction was 12% for rice stored at the highest MC (21%)”
e1“stored at 40°C compared to at 20°C”
Claim · model-written summary
Declining kernel integrity was associated with distinct microstructural changes.
- Taxon
- riceOryza sativae0
- Organ / stage
- rice kernelse0
- Outcome
- kernel physical integritye0
- Direction
- Decreasese0
- Qualifier
- unique microstructural changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decreases in kernel physical integrity were also associated with unique microstructural changes in rice kernels”
Claim · model-written summary
Sodium chloride treatment significantly reduced rice kernel physical integrity versus natamycin and untreated kernels.
- Taxon
- riceOryza sativae0
- Treatment
- Sodium chloride treatmente0
- Outcome
- physical integritye0
- Direction
- negatively impactede0
- Comparator
- natamycin treatment and untreated control samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium chloride treatment of rice kernels significantly and negatively impacted their physical integrity during storage compared to natamycin treatment and untreated control samples”
Claim · model-written summary
Cultivar-specific regression models predicted kernel physical integrity from storage conditions and antifungal treatments.
- Taxon
- riceOryza sativae0
- Outcome
- predicting changes in rice kernel physical integritye0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple regression models, developed for each cultivar were applicable for predicting changes in rice kernel physical integrity as a function of studied storage conditions and antifungal treatments”
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