A model for Arabidopsis class-1 KNOX gene function
نویسندگان
چکیده
منابع مشابه
KNOX lost the OX: the Arabidopsis KNATM gene defines a novel class of KNOX transcriptional regulators missing the homeodomain.
Three amino acid loop extension (TALE) homeodomain transcriptional regulators play a central role in plant and animal developmental programs. Plant KNOTTED1-like homeobox (KNOX) and animal Myeloid ecotropic viral integration site (MEIS) proteins share a TALE homeodomain and a MEINOX (MEIS-KNOX) domain, suggesting that an ancestral MEINOX-TALE protein predates the divergence of plants from fungi...
متن کاملA class II KNOX gene, KNOX4, controls seed physical dormancy.
Physical dormancy of seed is an adaptive trait that widely exists in higher plants. This kind of dormancy is caused by a water-impermeable layer that blocks water and oxygen from the surrounding environment and keeps embryos in a viable status for a long time. Most of the work on hardseededness has focused on morphological structure and phenolic content of seed coat. The molecular mechanism und...
متن کاملMechanisms that control knox gene expression in the Arabidopsis shoot.
Knotted1-like homeobox (knox) genes are expressed in specific patterns within shoot meristems and play an important role in meristem maintenance. Misexpression of the knox genes, KNAT1 or KNAT2, in Arabidopsis produces a variety of phenotypes, including lobed leaves and ectopic stipules and meristems in the sinus, the region between lobes. We sought to determine the mechanisms that control knox...
متن کاملASYMMETRIC LEAVES1 reveals knox gene redundancy in Arabidopsis.
The shoot apical meristem comprises undifferentiated stem cells and their derivatives, which include founder cells for lateral organs such as leaves. Meristem maintenance and lateral organ specification are regulated in part by negative interactions between the myb domain transcription factor ASYMMETRIC LEAVES1, which is expressed in lateral organ primordia, and homeobox transcription factors w...
متن کاملDOH1, a class 1 knox gene, is required for maintenance of the basic plant architecture and floral transition in orchid.
We report here the isolation and identification of an orchid homeobox gene, DOH1, from Dendrobium Madame Thong-In. Analyses of its sequence and genomic organization suggest that DOH1 may be the only class 1 knox gene in the genome. DOH1 mRNA accumulates in meristem-rich tissues, and its expression is greatly downregulated during floral transition. In situ hybridization analysis demonstrates tha...
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ژورنال
عنوان ژورنال: Plant Signaling & Behavior
سال: 2008
ISSN: 1559-2324
DOI: 10.4161/psb.3.4.5194