Patterns of Abiotic Stress-Induced Homoeologous Gene Silencing in Hexaploid Wheat

Autor:	Andrew Bottley
Rok vydání:	2013
Předmět:	Genetics Abiotic stress fungi food and beverages Plant Science Biology Phenotype Salinity stress Salinity Polyploid Gene silencing Limited evidence Agronomy and Crop Science Gene
Zdroj:	Journal of Agronomy and Crop Science. 199:466-469
ISSN:	0931-2250
Popis:	Genes duplicated following polyploidization (termed homoeologues) are not always equally expressed. Although homoeologous silencing is an established phenomenon among polyploid species, to date, only limited evidence has been gathered which associates a phenotype with the absence of an individual homoeologous transcript. Here, we show that salinity stress can induce homoeologous silencing in hexaploid wheat and that selective expression can also occur in a tissue not directly exposed to the stress. Some of the instances of salinity stress-induced homoeologous silencing were dependent on the severity of the stress. The responses were conserved across three diverse cultivars. It is likely that this type of response contributes significantly to the overall level of salinity resistance shown by polyploid wheat.
Databáze:	OpenAIRE
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