Abstract
Sorghum (cv. Maldandi) seeds with 8.45% initial moisture content (MC) and 98% germination, and pearl millet (cv. Sadoré local) seeds with 9.2% initial MC and 94% germination were used for the study. The effect of vacuum on seed longevity was studied at three MCs: 6%, 10% and 14%. The MCs were adjusted by holding the seeds on saturated salt solutions of LiCl, MgCl and NaCl for about a week at 25°C. Each seed lot was then subdivided into aliquots of 5 g and hermetically sealed in aluminium foil envelopes containing air or vacuum packed at a pressure of -0.95 bar. Seeds were held at 50°C to accelerate ageing and sampled at regular intervals. The sampling intervals ranged from daily (14% MC) to 8 weeks (6% MC), depending on the storage treatment. In addition to those stored at 50°C some pearl millet seeds were also stored at 35°C. The initial viability of seeds was estimated at the beginning of storage and subsequently at each sampling point by conducting replicated germination tests on fifty seeds. Germination was expressed as the percentage of normal seedlings produced after seven days of incubation at 20°C. There was a gradual loss in germination rate under all storage conditions. Seeds stored under the higher temperature of (50°) and/or high MC (14%) deteriorated faster than with other treatments. Pearl millet seeds survived longer than sorghum under similar conditions of storage. Analysis of variance of the estimates of half-life for the viability of seeds showed significant effects of MC, vacuum packing and their interaction on seed survival at 50°C (P < 0.001). Seeds dried to 6% MC retained viability longer than those stored at 10% and 14% MC. Vacuum packing further enhanced seed longevity at 6% MC but not at 10 or 14% MC.
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Claims 7
Claim · model-written summary
Germination of pearl millet and sorghum seeds declined gradually under all storage conditions.
- Taxon
- pearl millet and sorghum
Cenchrus americanus
Sorghumt0 - Outcome
- germination ratee0
- Direction
- losse0
Not reportedMaterialGeneCompoundOrgan / stageTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a gradual loss in germination rate under all storage conditions”
t0“pearl millet and sorghum”
Claim · model-written summary
Seeds stored at the higher temperature (50 degrees) and/or high moisture content (14%) deteriorated faster than under other treatments.
- Taxon
- pearl millet and sorghumCenchrus americanusSorghumt0
- Treatment
- higher temperature of (50°) and/or high MC (14%)e1
- Outcome
- deteriorated fastere1
- Direction
- fastere1
- Comparator
- other treatmentse1
Not reportedMaterialGeneCompoundOrgan / stageSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Seeds stored under the higher temperature of (50°) and/or high MC (14%) deteriorated faster than with other treatments”
t0“pearl millet and sorghum”
Claim · model-written summary
Pearl millet seeds survived longer than sorghum seeds under similar storage conditions.
- Taxon
- Pearl millet seedsCenchrus americanuse2
- Outcome
- survived longer than sorghume2
- Direction
- longere2
- Comparator
- sorghume2
Not reportedMaterialGeneCompoundOrgan / stageTreatmentSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Pearl millet seeds survived longer than sorghum under similar conditions of storage”
Claim · model-written summary
Seed moisture content, vacuum packing and their interaction had significant effects on seed survival (half-life of viability) at 50 degrees C (P < 0.001).
- Taxon
- pearl millet and sorghumCenchrus americanusSorghumt0
- Treatment
- MC, vacuum packing and their interactione3
- Outcome
- seed survivale3
- Qualifier
- 50°Ce3
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Analysis of variance of the estimates of half-life for the viability of seeds showed significant effects of MC, vacuum packing and their interaction on seed survival at 50°C (P < 0.001)”
t0“pearl millet and sorghum”
Claim · model-written summary
Seeds dried to 6% moisture content retained viability longer than seeds stored at 10% and 14% moisture content.
- Taxon
- pearl millet and sorghumCenchrus americanusSorghumt0
- Treatment
- dried to 6% MCe4
- Outcome
- retained viabilitye4
- Direction
- longere4
- Comparator
- 10% and 14% MCe4
Not reportedMaterialGeneCompoundOrgan / stageSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Seeds dried to 6% MC retained viability longer than those stored at 10% and 14% MC”
t0“pearl millet and sorghum”
Claim · model-written summary
Vacuum packing further enhanced seed longevity at 6% moisture content.
- Taxon
- pearl millet and sorghumCenchrus americanusSorghumt0
- Treatment
- Vacuum packinge5
- Outcome
- seed longevitye5
- Direction
- enhancede5
- Qualifier
- 6% MCe5
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Vacuum packing further enhanced seed longevity at 6% MC but not at 10 or 14% MC”
t0“pearl millet and sorghum”
Claim · model-written summary
Vacuum packing did not enhance seed longevity at 10% or 14% moisture content.
- Taxon
- pearl millet and sorghumCenchrus americanusSorghumt0
- Treatment
- Vacuum packinge5
- Outcome
- seed longevitye5
- Direction
- no_changeinferrede5
- Qualifier
- 10 or 14% MCe5
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Vacuum packing further enhanced seed longevity at 6% MC but not at 10 or 14% MC”
t0“pearl millet and sorghum”
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