LYS3 encodes a prolamin-box-binding transcription factor that controls embryo growth in barley and wheat.

ABSTRACT: Mutations at the LYS3 locus in barley have multiple effects on grain development, including an increase in embryo size and a decrease in endosperm starch content. The gene underlying LYS3 was identified by genetic mapping and mutations in this gene were identified in all four barley lys3 alleles. LYS3 encodes a transcription factor called Prolamin Binding Factor (PBF). Its role in controlling embryo size was confirmed using wheat TILLING mutants. To understand how PBF controls embryo development, we studied its spatial and temporal patterns of expression in developing grains. The PBF gene is expressed in both the endosperm and the embryos, but the timing of expression in these organs differs. PBF expression in wild-type embryos precedes the

SUBMITTER: Orman-Ligeza B 

PROVIDER: S-EPMC7263734 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature