Subunit polypeptide composition of rubisco and the origin of allopolyploid Arabidopsis suecica (Brassicaceae)

1994 ◽  
Vol 22 (8) ◽  
pp. 807-811 ◽  
Author(s):  
Klaus Mummenhoff ◽  
Herbert Hurka
Keyword(s):  
Polypeptide Composition ◽  
Arabidopsis Suecica

Rotavirus spike structure and polypeptide composition.

1991 ◽  
Vol 65 (8) ◽  
pp. 4334-4340 ◽  
Author(s):  
I D Anthony ◽  
S Bullivant ◽  
S Dayal ◽  
A R Bellamy ◽  
J A Berriman
Keyword(s):  
Polypeptide Composition

scholarly journals Concerted genomic and epigenomic changes accompany stabilization of Arabidopsis allopolyploids

2021 ◽  
Vol 5 (10) ◽  
pp. 1382-1393
Author(s):  
Xinyu Jiang ◽  
Qingxin Song ◽  
Wenxue Ye ◽  
Z. Jeffrey Chen
Keyword(s):  
Gene Expression ◽  
Dna Methylation ◽  
Small Rnas ◽  
Structural Variation ◽  
Self Incompatibility ◽  
Polyploid Evolution ◽  
Genomic Variations ◽  
Conserved Gene ◽  
Arabidopsis Suecica ◽  
Affect Gene Expression

AbstractDuring evolution successful allopolyploids must overcome ‘genome shock’ between hybridizing species but the underlying process remains elusive. Here, we report concerted genomic and epigenomic changes in resynthesized and natural Arabidopsis suecica (TTAA) allotetraploids derived from Arabidopsisthaliana (TT) and Arabidopsisarenosa (AA). A. suecica shows conserved gene synteny and content with more gene family gain and loss in the A and T subgenomes than respective progenitors, although A. arenosa-derived subgenome has more structural variation and transposon distributions than A. thaliana-derived subgenome. These balanced genomic variations are accompanied by pervasive convergent and concerted changes in DNA methylation and gene expression among allotetraploids. The A subgenome is hypomethylated rapidly from F1 to resynthesized allotetraploids and convergently to the T-subgenome level in natural A. suecica, despite many other methylated loci being inherited from F1 to all allotetraploids. These changes in DNA methylation, including small RNAs, in allotetraploids may affect gene expression and phenotypic variation, including flowering, silencing of self-incompatibility and upregulation of meiosis- and mitosis-related genes. In conclusion, concerted genomic and epigenomic changes may improve stability and adaptation during polyploid evolution.

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