Abstract
The effects of 2-methylisoborneol (MIB) and geosmin, the main sources of soil odor produced by microorganisms, on plant seed germination were examined for 15 kinds of Brassicaceae seeds including radish (Raphanus sativus var.radicula).Authentic MIB or geosmin was used at the concentration of 100 mg L -1 in the assay, and the effects were quantitatively indexed based on four parameters of cumulative seed germination: the final germination percentage, germination onset, weighted mean rate, and germination index.MIB and geosmin inhibited germination of all kinds of seeds tested for these parameters.Radish variety "Comet" was the most affected of all of the tested plant seeds.The estimated 50% inhibitory concentration values on germination of "Comet" were 70.5 and 7.5 mg L-1 for MIB and geosmin, respectively.We also conducted the primary characterization of the inhibition by MIB and geosmin on "Comet" seeds.Our findings were as follows: (1) onset of seed imbibition was not affected; (2) germination of seeds pre-imbibed in the control solution until approx.2 h before germination onset was inhibited by subsequent MIB or geosmin treatment; (3) growth of seedlings was not significantly affected; (4) the germination was restored by stratification, gibberellin A3 treatment, or seed coat removal; and (5) light irradiation affected the degree of inhibition.These results suggest that inhibition by MIB and geosmin is restricted to the germination process, at least in the early stage of growth, and that they act as growth -regulating substances.
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Claims 13
Claim · model-written summary
MIB inhibited germination of all tested Brassicaceae seeds.
- Taxon
- BrassicaceaeBrassicaceaee1
- Treatment
- MIBe0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“MIB and geosmin inhibited germination of all kinds of seeds tested for these parameters”
e1“Brassicaceae seeds including radish (Raphanus sativus var.radicula)”
Claim · model-written summary
Geosmin inhibited germination of all tested Brassicaceae seeds.
- Taxon
- BrassicaceaeBrassicaceaee1
- Treatment
- geosmine0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“MIB and geosmin inhibited germination of all kinds of seeds tested for these parameters”
e1“Brassicaceae seeds including radish (Raphanus sativus var.radicula)”
Claim · model-written summary
Comet radish was the most affected seed variety.
- Taxon
- Radish
Raphanus sativuse0 - Material
- Comete0
- Outcome
- most affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
The estimated MIB 50% inhibitory concentration for Comet germination was 70.5 mg L-1.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete0
- Treatment
- MIBe0
- Outcome
- 50% inhibitory concentration values on germinatione0
- Value
- 70.5 and 7.5 mg L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated 50% inhibitory concentration values on germination of "Comet" were 70.5 and 7.5 mg L-1 for MIB and geosmin, respectively”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
The estimated geosmin 50% inhibitory concentration for Comet germination was 7.5 mg L-1.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete0
- Treatment
- geosmine0
- Outcome
- 50% inhibitory concentration values on germinatione0
- Value
- 7.5 mg L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated 50% inhibitory concentration values on germination of "Comet" were 70.5 and 7.5 mg L-1 for MIB and geosmin, respectively”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Seed imbibition onset was unaffected.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Outcome
- onset of seed imbibitione0
- Direction
- not affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“onset of seed imbibition was not affected”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
MIB inhibited germination after control pre-imbibition until about two hours before onset.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- MIBe0
- Outcome
- germinatione0
- Direction
- inhibitede0
- Qualifier
- until approx.2 h before germination onsete0
- Comparator
- control solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination of seeds pre-imbibed in the control solution until approx.2 h before germination onset was inhibited by subsequent MIB or geosmin treatment”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Geosmin inhibited germination after control pre-imbibition until about two hours before onset.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- geosmine0
- Outcome
- germinatione0
- Direction
- inhibitede0
- Comparator
- control solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination of seeds pre-imbibed in the control solution until approx.2 h before germination onset was inhibited by subsequent MIB or geosmin treatment”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Seedling growth was not significantly affected.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Outcome
- growth of seedlingse0
- Direction
- not significantly affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of seedlings was not significantly affected”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Stratification restored germination.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- stratificatione0
- Outcome
- germinatione0
- Direction
- restorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the germination was restored by stratification, gibberellin A3 treatment, or seed coat removal”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Gibberellin A3 treatment restored germination.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- gibberellin A3 treatmente0
- Outcome
- germinatione0
- Direction
- restorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the germination was restored by stratification, gibberellin A3 treatment, or seed coat removal”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Seed coat removal restored germination.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- seed coat removale0
- Outcome
- germinatione0
- Direction
- restorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the germination was restored by stratification, gibberellin A3 treatment, or seed coat removal”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
Claim · model-written summary
Light irradiation affected the degree of inhibition.
- Taxon
- RadishRaphanus sativuse1
- Material
- Comete1
- Treatment
- light irradiatione0
- Outcome
- degree of inhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light irradiation affected the degree of inhibition”
e1“Radish variety "Comet" was the most affected of all of the tested plant seeds”
The same questions in other papers
gibberellin A3 · growth · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- positive
seed treatment · growth · Raphanus sativus (radish)Positive and negative results
11 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
9 papers more in this group
See all 13 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.