Plant chromosome polytenization contributes to suppression of root growth in high polyploids

© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink serv...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 75(2024), 18 vom: 27. Sept., Seite 5703-5716
1. Verfasser: Kikuchi, Suzuka (VerfasserIn)
Weitere Verfasser: Sakamoto, Takuya, Matsunaga, Sachihiro, Sugiyama, Munetaka, Iwamoto, Akitoshi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Arabidopsis thaliana autopolyploid chromosome polytenization endoreduplication high polyploid kinematic analysis root growth whole-mount FISH
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520 |a Autopolyploidization, which refers to a polyploidization via genome duplication without hybridization, promotes growth in autotetraploids, but suppresses growth in high polyploids (autohexaploids or auto-octoploids). The mechanism underlying this growth suppression (i.e. 'high-ploidy syndrome') has not been comprehensively characterized. In this study, we conducted a kinematic analysis of the root apical meristem cells in Arabidopsis thaliana autopolyploids (diploid, tetraploid, hexaploid, and octoploid) to determine the effects of the progression of genome duplication on root growth. The results of the root growth analysis showed that tetraploidization increases the cell volume, but decreases cell proliferation. However, cell proliferation and volume growth are suppressed in high polyploids. Whole-mount fluorescence in situ hybridization analysis revealed extensive chromosome polytenization in the region where cell proliferation does not usually occur in the roots of high polyploids, which is likely to be at least partly correlated with the suppression of endoreduplication. The study findings indicate that chromosome polytenization is important for the suppressed growth of high polyploids 
650 4 |a Journal Article 
650 4 |a Arabidopsis thaliana 
650 4 |a autopolyploid 
650 4 |a chromosome polytenization 
650 4 |a endoreduplication 
650 4 |a high polyploid 
650 4 |a kinematic analysis 
650 4 |a root growth 
650 4 |a whole-mount FISH 
700 1 |a Sakamoto, Takuya  |e verfasserin  |4 aut 
700 1 |a Matsunaga, Sachihiro  |e verfasserin  |4 aut 
700 1 |a Sugiyama, Munetaka  |e verfasserin  |4 aut 
700 1 |a Iwamoto, Akitoshi  |e verfasserin  |4 aut 
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