Abstract
Cherry tomato ( Lycopersicon esculentum Mill.) seeds harvested from fruits at four stages of development [2, 4, 6 and 8 weeks after flowering (WAF)] were washed (1% HCl) and germinated after 72 h of desiccation at 20°C, and 76%, 49% or 12% RH. Seed α-amylase activity was determined at each stage of development and correlated with seed germination. Desiccation at 76% and 49% RH had no significant effect on the germination of seeds at 4, 6 and 8 WAF, whereas it improved germination of seeds at 2 WAF. Low RH (12%) significantly reduced seed germination at all stages of development. There was a positive correlation ( r = 0.68, P ≤ 0.05) between germination and α-amylase activity during seed development. Scanning electron microscopy also revealed a correlation between starch grain occurrence in the endosperm and α-amylase activity. Placenta water potential decreased with fruit and seed maturation, and correlated negatively with improved seed germination and α-amylase activity. Promotion of seed germination by desiccation in developing cherry tomato seeds was lost 4 weeks prior to mass maturity (80 ± 3% seed water content and –2.3 ± 0.1 MPa placenta water potential). It is proposed that the water potential differential between the placenta and the seeds influences α-amylase activity and germination behaviour during development.
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Claims 11
Claim · model-written summary
Desiccation at 76% and 49% RH had no significant effect on germination of seeds at 4, 6 and 8 weeks after flowering.
- Taxon
- Lycopersicon esculentum Mill.
Solanum lycopersicume2 - Organ / stage
- seeds at 4, 6 and 8 WAFe1
- Treatment
- Desiccation at 76% and 49% RHe1
- Outcome
- germination of seeds at 4, 6 and 8 WAFe1
- Direction
- no significant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Desiccation at 76% and 49% RH had no significant effect on the germination of seeds at 4, 6 and 8 WAF, whereas it improved germination of seeds at 2 WAF”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Desiccation at 76% and 49% RH improved seed germination at 2 weeks after flowering.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Organ / stage
- seeds at 2 WAFe1
- Treatment
- Desiccation at 76% and 49% RHe1
- Outcome
- germination of seeds at 2 WAFe1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Desiccation at 76% and 49% RH had no significant effect on the germination of seeds at 4, 6 and 8 WAF, whereas it improved germination of seeds at 2 WAF”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Low relative humidity of 12% significantly reduced seed germination at all stages of development.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Treatment
- Low RH (12%)e3
- Outcome
- seed germinatione3
- Direction
- reducede3
- Qualifier
- at all stages of developmente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Low RH (12%) significantly reduced seed germination at all stages of development”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Germination and alpha-amylase activity were positively correlated during seed development (r = 0.68).
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Organ / stage
- seed developmente4
- Outcome
- germination and α-amylase activitye4
- Direction
- positive correlatione4
- Value
- r = 0.68e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“There was a positive correlation ( r = 0.68, P ≤ 0.05) between germination and α-amylase activity during seed development”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Starch grain occurrence in the endosperm was correlated with alpha-amylase activity.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Organ / stage
- endosperme5
- Outcome
- starch grain occurrence in the endosperm and α-amylase activitye5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“a correlation between starch grain occurrence in the endosperm and α-amylase activity”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Placenta water potential decreased with fruit and seed maturation.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Organ / stage
- fruit and seed maturatione6
- Outcome
- Placenta water potentiale6
- Direction
- decreasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Placenta water potential decreased with fruit and seed maturation, and correlated negatively with improved seed germination and α-amylase activity”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Placenta water potential correlated negatively with improved seed germination and alpha-amylase activity.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Organ / stage
- Placentae6
- Outcome
- improved seed germination and α-amylase activitye6
- Direction
- correlated negativelye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Placenta water potential decreased with fruit and seed maturation, and correlated negatively with improved seed germination and α-amylase activity”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
Claim · model-written summary
Promotion of seed germination by desiccation was lost 4 weeks before mass maturity.
- Taxon
- cherry tomato
Solanum lycopersicum var. cerasiformee7 - Organ / stage
- developing cherry tomato seedse7
- Outcome
- Promotion of seed germination by desiccatione7
- Qualifier
- lost 4 weeks prior to mass maturitye7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Promotion of seed germination by desiccation in developing cherry tomato seeds was lost 4 weeks prior to mass maturity”
Claim · model-written summary
Promotion of seed germination by desiccation was lost at a seed water content of 80 ± 3%.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee7
- Outcome
- Promotion of seed germination by desiccatione7
- Value
- 80 ± 3%e0
- Qualifier
- seed water contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Promotion of seed germination by desiccation in developing cherry tomato seeds was lost 4 weeks prior to mass maturity”
e0“80 ± 3% seed water content”
Claim · model-written summary
Promotion of seed germination by desiccation was lost at a placenta water potential of –2.3 ± 0.1 MPa.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformee7
- Outcome
- Promotion of seed germination by desiccatione7
- Value
- –2.3 ± 0.1 MPae0
- Qualifier
- placenta water potentiale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Promotion of seed germination by desiccation in developing cherry tomato seeds was lost 4 weeks prior to mass maturity”
e0“–2.3 ± 0.1 MPa placenta water potential”
Claim · model-written summary
The water potential differential between the placenta and the seeds is proposed to influence alpha-amylase activity and germination behaviour.
- Taxon
- Lycopersicon esculentum Mill.Solanum lycopersicume2
- Outcome
- α-amylase activity and germination behavioure0
- Qualifier
- water potential differential between the placenta and the seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is proposed that the water potential differential between the placenta and the seeds influences α-amylase activity and germination behaviour during development”
e2“Cherry tomato ( Lycopersicon esculentum Mill.) seeds”
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