Cytokinesis in the Arabidopsis embryo involves the syntaxin-related KNOLLE gene product

Article Abstract:

The Arabidopsis plant exhibits an abnormal organization of cells at its embryonic phase that may be due to mutations in the Knolle gene. The normal embryo forms radial patterns of cells that begin to differentiate into functional types according to this pattern. However, mutations in the Knolle gene lead to the formation of cells with multiple nuclei or incomplete cell walls. The protein produced by the gene was found to have a structure similar to syntaxins and to regulate vesicular trafficking.

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Endogenous siRNAs derived from a pair of natural cis-antisense transcripts regulate salt tolerance in arabidopsis

Article Abstract:

The antisense overlapping gene pair of Delta(super 1)-pyrroline-5-carboxylate dehydrogenase (P5CDH), a stress-related gene, and SRO5, a gene of unknown function, generates two types of siRNAs. Data suggest that the P5CDH and SRO5 proteins are functionally related, and that the P2CDH-SRO5 gene pair defines a mode of siRNA function and biogenesis that applied to other natural cis-antisense gene pairs in eukaryotic genomes.

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A MAPKK kinase gene regulates extra-embryonic cell fate in Arabidopsis

Article Abstract:

A study done reveals that a MAP kinase cascade acts as a molecular switch promoting extra-embryonic fate. Cells of the apical lineage adopt an isotropic growth pattern and form the spherical proembryo and cells of the basal lineage continue to elongate and divide transversely producing a file of seven to nine cells.

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