Abstract
A study was conducted to investigate the effect of accelerated ageing on aerobic rice (Oryza sativa L.) seed quality. The experiment was carried out at the Faculty of Sustainable Agriculture, Universiti Malaysia Sabah. The study aimed to determine the most reliable method in assessing seed deterioration. Completely Randomized Design (CRD) with four replicates for each treatment was used. Aerobic rice seeds were artificially aged by exposing them to temperatures of 42 °C and 45 °C for six different durations: 12, 24, 36, 48, 72 and 96 hours. Parameters evaluated in this study were viability, germination percentage, abnormal seedlings, dead seeds, seedling vigour index, length of root & shoot on the seventh and fourteenth days, fresh & dry weight of seedlings and seed moisture content. Initial seed viability and germination percentages were 67.50 % and 67.50 % respectively. These values increased to 93.50% and 86.00 % when exposed to 42 °C for 12 hours (P=0.004 and P=0.052), suggesting some breaking of dormancy had occurred during the early period of artificial ageing. Seed vigour index indicated the robustness of seeds. Non-aged seeds ( control) showed the best performance, with high values for seed vigour index (1057.7), shoot (4.42 cm) and root length (11.17 cm). Seed quality were greatly reduced beyond 48 hours of exposure to high temperatures and relative humidity conditions. The study concluded that accelerated ageing (by exposing seeds to different temperatures for a variable period of time) adversely affected rice seed vigour.
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Claims 8
Claim · model-written summary
Aerobic rice seed viability rose from an initial 67.50% to 93.50% after exposure to 42 °C for 12 hours (P=0.004).
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Initial seed viability and germination percentages were 67.50 % and 67.50 % respectively. These values increased to 93.50% and 86.00 % when exposed to 42 °C for 12 hours (P=0.004 and P=0.052)”
Claim · model-written summary
Aerobic rice germination percentage rose from an initial 67.50% to 86.00% after exposure to 42 °C for 12 hours (P=0.052).
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Initial seed viability and germination percentages were 67.50 % and 67.50 % respectively. These values increased to 93.50% and 86.00 % when exposed to 42 °C for 12 hours (P=0.004 and P=0.052)”
Claim · model-written summary
The authors suggest some dormancy breaking occurred during the early period of artificial ageing.
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“suggesting some breaking of dormancy had occurred during the early period of artificial ageing”
Claim · model-written summary
Non-aged control seeds had a high seed vigour index of 1057.7.
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Non-aged seeds ( control) showed the best performance, with high values for seed vigour index (1057.7), shoot (4.42 cm) and root length (11.17 cm)”
Claim · model-written summary
Non-aged control seeds had a shoot length of 4.42 cm.
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Non-aged seeds ( control) showed the best performance, with high values for seed vigour index (1057.7), shoot (4.42 cm) and root length (11.17 cm)”
Claim · model-written summary
Non-aged control seeds had a root length of 11.17 cm.
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Non-aged seeds ( control) showed the best performance, with high values for seed vigour index (1057.7), shoot (4.42 cm) and root length (11.17 cm)”
Claim · model-written summary
Seed quality was greatly reduced beyond 48 hours of exposure to high temperatures and relative humidity.
- Taxon
- aerobic ricee0
- Treatment
- exposure to high temperatures and relative humidity conditionse1
- Outcome
- Seed qualitye1
- Direction
- greatly reducede1
- Qualifier
- beyond 48 hourse1
Not reportedComparator
Verbatim
e0“aerobic rice (Oryza sativa L.)”
e1“Seed quality were greatly reduced beyond 48 hours of exposure to high temperatures and relative humidity conditions”
Claim · model-written summary
Accelerated ageing by exposing seeds to different temperatures for varying durations adversely affected rice seed vigour.
- Taxon
- rice
Oryza sativae0 - Treatment
- accelerated ageinge0
- Outcome
- rice seed vigoure0
- Direction
- adversely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study concluded that accelerated ageing (by exposing seeds to different temperatures for a variable period of time) adversely affected rice seed vigour”
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