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The Arabidopsis thaliana MERISTEM LAYER 1 promoter specifies epidermal expression in meristems and young primordia
Author(s) -
Sessions Allen,
Weigel Detlef,
Yanofsky Martin F.
Publication year - 1999
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1046/j.1365-313x.1999.00594.x
Subject(s) - meristem , primordium , arabidopsis thaliana , arabidopsis , biology , epidermis (zoology) , microbiology and biotechnology , gene expression , gene , reporter gene , regulation of gene expression , regulatory sequence , genetics , mutant , anatomy
Summary The Arabidopsis thaliana MERISTEM LAYER 1 ( ATML1 ) gene is expressed in the epidermis of developing embryos and shoot meristems. To identify regulatory sequences necessary for epidermis‐specific expression, three fusions of overlapping ATML1 genomic sequences to the GUS reporter gene were introduced into Arabidopsis plants. All fusion genes conferred epidermis‐specific expression of both GUS mRNA and protein activity but varied in both the timing and relative levels of expression, suggesting partial redundancy of ATML1 regulatory elements. This study defines L1‐specific regulatory sequences that are sufficient to direct foreign gene expression in a layer‐specific manner.