Homoeolog-specific activation of genes for heat acclimation in the allopolyploid grass Brachypodium hybridum.

ABSTRACT:

Background

Allopolyploid plants often show wider environmental tolerances than their ancestors; this is expected to be due to the merger of multiple distinct genomes with a fixed heterozygosity. The complex homoeologous gene expression could have been evolutionarily advantageous for the adaptation of allopolyploid plants. Despite multiple previous studies reporting homoeolog-specific gene expression in allopolyploid species, there are no clear examples of homoeolog-specific function in acclimation to a long-term stress condition.

Results

We found that the allopolyploid grass Brachypodium hybridum and its ancestor Brachypodium stacei show long-term heat stress tolerance, unlike its other ancestor, Brachypodium distachyon. To understand the physiological traits of B. hybridum,

SUBMITTER: Takahagi K 

PROVIDER: S-EPMC5915950 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature