KOJAK encodes a cellulose synthase-like protein required for root hair cell morphogenesis in Arabidopsis

Article Abstract:

A class of Arabidopsis root hair mutants which have defective cell walls has been defined. AtC-SLD3, a cellulose synthase-like protein encoded by the KOJAK gene required for formation of the cell wall in root hair morphogenesis, has been identified.

United Kingdom, Ireland, Plant cell walls, Cell walls, Plant morphogenesis, Root hairs

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Mitogen-activated protein kinase phosphatase is required for genotoxic stress relief in Arabidopsis

Article Abstract:

An Arabidopsis mutant (mkp1) hypersensitive to genotoxic stress treatments because of disruption of mitogen-activated protein kinase phosphatase (AtMKP) has been identified. A gene that encodes an Arabidopsis homolog of AtMKP is necessary for Arabidopsis genotoxic stress relief. It appears that the MAP kinase cascade has a vital role in genotoxic stress signaling in plants and that AtMKP1 is a vital regulator of MAP kinase activity in vivo. It probably determines outcome of the cellular reaction and the level of genotoxic resistance.

Switzerland, Physiological aspects, DNA repair, Ultraviolet radiation, Cellular signal transduction, Protein kinases, Plant molecular biology, Genetic toxicology, Plants, Effect of stress on

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The ROOT HAIRLESS 1 gene encodes a nuclear protein required for root hair initiation in Arabidopsis

Article Abstract:

Molecular research of the ROOT HAIRLESS 1 (RHL1) gene shows that genetic mutation of RHL1 will cause a seedling lethal phenotype in Arabidopsis. RHL1 directs a fusion protein to the nucleus, enabling root cells to grow hairs or remain hairless in root development. Interference with RHL1 disrupts this process, resulting in a lethal mutation of the root system.

United States, Genetic regulation, Lethal mutation

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