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20231223223211.0 |
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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2010.09.001
|2 doi
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|a pubmed24n0673.xml
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|a (DE-627)NLM201846608
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|a (NLM)20870311
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
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|a Goggin, Danica E
|e verfasserin
|4 aut
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|a Dark-mediated dormancy release in stratified Lolium rigidum seeds is associated with higher activities of cell wall-modifying enzymes and an apparent increase in gibberellin sensitivity
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 31.05.2011
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2010 Elsevier GmbH. All rights reserved.
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|a Dormancy release in freshly matured, imbibed annual ryegrass (Lolium rigidum) seeds is inhibited by light and involves a decrease in seed sensitivity to abscisic acid. Other processes involved in dormancy release in the dark were investigated by measuring seed storage compound mobilisation and the activity of cell wall-degrading enzymes. Activities of endo-β-mannanase and total peroxidase were higher in dark-stratified compared to light-stratified seeds, indicating that weakening of the structures constraining the embryo was accelerated in the dark. A dramatic degradation of storage proteins in light-stratified seeds, accompanied by induction of a high molecular mass protease, suggests that maintenance of storage(-like) proteins is also important in dark-mediated dormancy release. α-Amylase activity was induced in dark-stratified seeds at least 48 h prior to radicle emergence upon transfer to conditions permitting germination, or in light-stratified seeds supplied with exogenous gibberellin A(4). This suggests that (a) α-amylase is involved in stimulation of germination of non-dormant L. rigidum seeds, and (b) dark-stratified seeds have an increased sensitivity to gibberellins which permits the rapid induction of α-amylase activity upon exposure to germination conditions. Overall, it appears that a number of processes, although possibly minor in themselves, occur in concert during dark-stratification to contribute to dormancy release
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Gibberellins
|2 NLM
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|a Plant Growth Regulators
|2 NLM
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|a Seed Storage Proteins
|2 NLM
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|a Abscisic Acid
|2 NLM
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| 650 |
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|a 72S9A8J5GW
|2 NLM
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| 650 |
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|a Peroxidase
|2 NLM
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| 650 |
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|a EC 1.11.1.7
|2 NLM
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| 650 |
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|a alpha-Amylases
|2 NLM
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| 650 |
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|a EC 3.2.1.1
|2 NLM
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| 650 |
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|a beta-Mannosidase
|2 NLM
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| 650 |
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|a EC 3.2.1.25
|2 NLM
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| 700 |
1 |
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|a Powles, Stephen B
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Toorop, Peter E
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Steadman, Kathryn J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 168(2011), 6 vom: 15. Apr., Seite 527-33
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:168
|g year:2011
|g number:6
|g day:15
|g month:04
|g pages:527-33
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|u http://dx.doi.org/10.1016/j.jplph.2010.09.001
|3 Volltext
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|d 168
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|h 527-33
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