Abstract
Less than 20% of the viable seeds of three subterranean clover cultivars survived exposure to typical summer field environments in the absence of protection from embryo dormancy and impermeability. The survival rate of seeds was no higher when protected by embryo dormancy only. By contrast, when the seeds were protected by both embryo dormancy and impermeability the survival rate of viable seeds was 70% or higher. It is concluded that fully mature dry seeds of subterranean clover receive little protection from embryo dormancy during the summer, although the mechanism may well be important in preventing germination during the late seed maturation period. It is suggested that in breeding and selection programmes impermeability should receive priority as a germination-regulating mechanism.
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Claims 6
Claim · model-written summary
Less than 20% of viable seeds survived summer field exposure without either protective mechanism.
- Taxon
- subterranean clover
Trifolium subterraneume0 - Outcome
- viable seeds of three subterranean clover cultivars survivede0
- Value
- Less than 20%e0
- Qualifier
- in the absence of protection from embryo dormancy and impermeabilitye0
- Setting
- typical summer field environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Less than 20% of the viable seeds of three subterranean clover cultivars survived exposure to typical summer field environments in the absence of protection from embryo dormancy and impermeability”
Claim · model-written summary
Embryo dormancy alone did not improve seed survival relative to no protection.
- Taxon
- subterranean cloverTrifolium subterraneumt0
- Treatment
- embryo dormancy onlye0
- Outcome
- survival rate of seedse0
- Direction
- no highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The survival rate of seeds was no higher when protected by embryo dormancy only”
t0“subterranean clover seeds”
Claim · model-written summary
Combined dormancy and impermeability protected at least 70% of viable seeds.
- Taxon
- subterranean cloverTrifolium subterraneumt0
- Treatment
- both embryo dormancy and impermeabilitye0
- Outcome
- survival rate of viable seedse0
- Direction
- highere0
- Value
- 70% or highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the seeds were protected by both embryo dormancy and impermeability the survival rate of viable seeds was 70% or higher”
t0“subterranean clover seeds”
Claim · model-written summary
The authors conclude embryo dormancy gives fully mature dry seeds little summer protection.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Organ / stage
- fully mature dry seedse0
- Outcome
- little protection from embryo dormancye0
- Qualifier
- during the summere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fully mature dry seeds of subterranean clover receive little protection from embryo dormancy during the summer”
Claim · model-written summary
The authors suggest embryo dormancy may prevent germination during late seed maturation.
- Taxon
- subterranean cloverTrifolium subterraneumt0
- Outcome
- preventing germinatione0
- Qualifier
- during the late seed maturation periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mechanism may well be important in preventing germination during the late seed maturation period”
t0“subterranean clover seeds”
Claim · model-written summary
Breeding and selection should prioritize impermeability for germination regulation.
- Taxon
- subterranean cloverTrifolium subterraneumt0
- Outcome
- impermeability should receive priority as a germination-regulating mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in breeding and selection programmes impermeability should receive priority as a germination-regulating mechanism”
t0“subterranean clover seeds”