AUTHOR=June Viviana , Xu Dongqing , Papoulas Ophelia , Boutz Daniel , Marcotte Edward M. , Chen Z. Jeffrey 

TITLE=Protein nonadditive expression and solubility contribute to heterosis in Arabidopsis hybrids and allotetraploids

JOURNAL=Frontiers in Plant Science

VOLUME=Volume 14 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2023.1252564

DOI=10.3389/fpls.2023.1252564

ISSN=1664-462X

ABSTRACT=We analyzed fractionated proteomes to test protein abundance and solubility in Arabidopsis hybrids and polyploids. Many proteins in stress-responses are nonadditively expressed in intraspecific hybrids or allotetraploids. There are more soluble proteins of ribosomal biosynthesis and photosynthetic activities in the hybrids than in their parents but not in allotetraploids. In the allotetraploids, expression levels of protein homoeologs are biased for ~20% of nonadditively expressed proteins. Nonadditive protein expression and solubility may play a role in heterosis.