Diversity in boron toxicity tolerance of Australian barley (Hordeum vulgare L.) genotypes.

ABSTRACT:

Background

Boron (B) is an important micronutrient for plant growth, but is toxic when levels are too high. This commonly occurs in environments with alkaline soils and relatively low rainfall, including many of the cereal growing regions of southern Australia. Four major genetic loci controlling tolerance to high soil B have been identified in the landrace barley, Sahara 3771. Genes underlying two of the loci encode the B transporters HvBot1 and HvNIP2;1.

Results

We investigated sequence and expression level diversity in HvBot1 and HvNIP2;1 across barley germplasm, and identified five novel coding sequence alleles for HvBot1. Lines were identified containing either single or multiple copies of the Sahara HvBot1 allele. We established that only the tandemly duplicated Sahara

SUBMITTER: Hayes JE 

PROVIDER: S-EPMC4584011 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature