Abstract
The purpose of this study was to investigate the role of cellulase in endosperm cap weakening and radicle elongation during lettuce (Lactuca sativa L.) seed germination. The application of abscisic acid (ABA) or ethephon inhibits or promotes germination, respectively, by affecting endosperm cap weakening and radicle elongation. Cellulase activities, and related protein and transcript abundances of two lettuce cellulase genes, LsCEL1 and LsCEL2, increase in the endosperm cap and radicle prior to radicle protrusion following imbibition in water. ABA or ethephon reduce or elevate, respectively, cellulase activity, and related protein and transcript abundances in the endosperm cap. Taken together, these observations suggest that cellulase plays a role in endosperm cap weakening and radicle elongation during lettuce seed germination, and that the regulation of cellulase in the endosperm cap by ABA and ethephon play a role in endosperm cap weakening. However, the influence of ABA and ethephon on radicle elongation may not be through their effects on cellulase.
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Claims 7
Claim · model-written summary
ABA inhibited lettuce germination.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- abscisic acid (ABA)e0
- Outcome
- germinatione0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of abscisic acid (ABA) or ethephon inhibits or promotes germination, respectively, by affecting endosperm cap weakening and radicle elongation.”
t0“lettuce seed germination”
Claim · model-written summary
Ethephon promoted lettuce germination.
- Taxon
- lettuceLactuca sativat0
- Treatment
- ethephone0
- Outcome
- germinatione0
- Direction
- promotese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of abscisic acid (ABA) or ethephon inhibits or promotes germination, respectively, by affecting endosperm cap weakening and radicle elongation.”
t0“lettuce seed germination”
Claim · model-written summary
Cellulase activity increased before radicle protrusion.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- endosperm cap and radiclee0
- Outcome
- Cellulase activitiese0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cellulase activities, and related protein and transcript abundances of two lettuce cellulase genes, LsCEL1 and LsCEL2, increase in the endosperm cap and radicle prior to radicle protrusion following imbibition in water.”
t0“lettuce seed germination”
Claim · model-written summary
LsCEL1 and LsCEL2 protein and transcript abundance increased before radicle protrusion.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- endosperm cap and radiclee0
- Gene
- LsCEL1 and LsCEL2e0
- Outcome
- protein and transcript abundancese0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cellulase activities, and related protein and transcript abundances of two lettuce cellulase genes, LsCEL1 and LsCEL2, increase in the endosperm cap and radicle prior to radicle protrusion following imbibition in water.”
t0“lettuce seed germination”
Claim · model-written summary
ABA reduced cellulase activity and related protein and transcript abundance in the endosperm cap.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- endosperm cape0
- Treatment
- ABAe0
- Outcome
- cellulase activity, and related protein and transcript abundancese0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA or ethephon reduce or elevate, respectively, cellulase activity, and related protein and transcript abundances in the endosperm cap.”
t0“lettuce seed germination”
Claim · model-written summary
Ethephon elevated cellulase activity and related protein and transcript abundance in the endosperm cap.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- endosperm cape0
- Treatment
- ethephone0
- Outcome
- cellulase activity, and related protein and transcript abundancese0
- Direction
- elevatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA or ethephon reduce or elevate, respectively, cellulase activity, and related protein and transcript abundances in the endosperm cap.”
t0“lettuce seed germination”
Claim · model-written summary
The authors suggest cellulase contributes to cap weakening and radicle elongation.
- Taxon
- lettuceLactuca sativat0
- Outcome
- endosperm cap weakening and radicle elongatione0
- Qualifier
- cellulase plays a rolee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these observations suggest that cellulase plays a role in endosperm cap weakening and radicle elongation during lettuce seed germination”
t0“lettuce seed germination”
The same questions in other papers
(2-chloroethyl)phosphonic acid · growth · Lactuca sativa (garden lettuce)Results differ
4 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
4 papers more in this group
See all 8 papers →(+)-abscisic acid · molecular: expression · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
(+)-abscisic acid · growth · Lactuca sativa (garden lettuce)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
7 papers more in this group
See all 11 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.