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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erv461
|2 doi
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|a pubmed24n0847.xml
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Jameson, Paula Elizabeth
|e verfasserin
|4 aut
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1 |
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|a Cytokinin
|b a key driver of seed yield
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|c 2016
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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 25.10.2016
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|a Date Revised 10.03.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a The cytokinins have been implicated in many facets of plant growth and development including cell division and differentiation, shoot and root growth, apical dominance, senescence, fruit and seed development, and the response to biotic and abiotic stressors. Cytokinin levels are regulated by a balance between biosynthesis [isopentenyl transferase (IPT)], activation [Lonely Guy (LOG)], inactivation (O-glucosyl transferase), re-activation (β-glucosidase), and degradation [cytokinin oxidase/dehydrogenase (CKX)]. During senescence, the levels of active cytokinins decrease, with premature senescence leading to a decrease in yield. During the early stages of fruit and seed development, cytokinin levels are transiently elevated, and coincide with nuclear and cell divisions which are a determinant of final seed size. Exogenous application of cytokinin, ectopic expression of IPT, or down-regulation of CKX have, on occasions, led to increased seed yield, leading to the suggestion that cytokinin may be limiting yield. However, manipulation of cytokinins is complex, not only because of their pleiotropic nature but also because the genes coding for biosynthesis and metabolism belong to multigene families, the members of which are themselves spatially and temporally differentiated. Previous research on yield of rice showed that plant breeders could directly target the cytokinins. Modern genome editing tools could be employed to target and manipulate cytokinin levels to increase seed yield with the concurrent aim of maintaining quality. However, how the cytokinin level is modified and whether IPT or CKX is targeted may depend on whether the plant is considered to be in a source-limiting environment or to be sink limited
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|a Journal Article
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|a Review
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|a CKX
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|a CRISPR
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|a Cell division
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|a IPT
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|a cytokinin oxidase/dehydrogenase
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|a isopentenyl transferase
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|a senescence
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|a sequence-specific nucleases
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|a sink
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|a source.
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|a Cytokinins
|2 NLM
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| 700 |
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|a Song, Jiancheng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 67(2016), 3 vom: 02. Feb., Seite 593-606
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:67
|g year:2016
|g number:3
|g day:02
|g month:02
|g pages:593-606
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|u http://dx.doi.org/10.1093/jxb/erv461
|3 Volltext
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