EIR1, a root-specific protein involved in auxin transport, is required for gravitropism in Arabidopsis thaliana

Article Abstract:

The EIR1 gene of Arabidopsis, expressed only in roots, is in a family of plant genes similar in some ways to bacterial membrane transporters. The roots are agrabitropic and have less sensitivity to ethylene. Expression only in the root is consistent with the phenotypes of the eir1 mutants. Data indicate that the EIR1 protein has a root-specific role in transporting auxin. In Saccharomyces cerevisiae expression of the EIR1 gene gives resistance to fluorinated indolic compounds. Externally applied auxin gets a response from roots of eir1 mutants; they do not respond to the auxin generated internally.

Analysis, Roots (Botany), Membrane proteins, Cell membranes, Auxin, Auxins, Tropisms, Tropism, Plant molecular biology

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Feedback control of morphogenesis in fungi by aromatic alcohols

Article Abstract:

A quorum signaling pathway is described that links environmental sensing to morphogenesis in Saccharomyces cerevisiae. Saccharomyces cells secrete aromatic alcohols that stimulate morphogenesis by inducing the expression of FLO11 through a Tpk2p-dependent mechanism by which a quorum-sensing circuit is defined that allows Saccharomyces to respond to both cell density and the nutritional state of the environment.

United States, Science & research, Food preparations, not elsewhere classified, All Other Miscellaneous Food Manufacturing, Brewers' Yeast, Genetic aspects, Cellular signal transduction, Morphogenesis, Brewer's yeast, Saccharomyces cerevisiae

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