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  • 1
    Electronic Resource
    Electronic Resource
    The MSG1 and AXR1 genes of Arabidopsis are likely to act independently in growth-curvature responses of hypocotyls (1999)
    Springer
    Planta 207 (1999), S. 362-369 
    Details
    ISSN: 1432-2048
    Keywords: Key words:Arabidopsis (gravitropism ; mutant) ; Auxin-insensitive mutant ; Gravitropism ; Growth curvature ; Growth orientation ; Phototropism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Growth-curvature responses of hypocotyls of Arabidopsis thaliana (L.) Heynh. were measured in double mutants between msg1 and axr1, both of which are auxin-resistant and defective in hypocotyl growth curvature induced upon unilateral application of auxin. The msg1 axr1 double mutants showed no auxin-induced growth curvature, that is, they exhibited the msg1 phenotype, though the axr1 defects were partial. Hypocotyls of both the msg1 and axr1 mutants were partially defective in second-positive phototropism, whereas the double mutants lost the response completely. When grown on vertically held agar plates, the axr1 mutant showed normal hypocotyl gravitropism and the mutation did not affect the reduced hypocotyl gravitropism of msg1. Hypocotyls of msg1 and axr1 mutants grew upward like wild-type ones when grown along an agar surface, while they grew more randomly when grown without an agar support, suggesting that axr1 hypocotyls are not completely normal in gravitropism. The extent of defects in growth orientation increased in the order: msg1 axr1 double mutants 〉 msg1 〉 axr1 〉 wild type. The hypocotyls of these mutants showed auxin resistance in the order: msg1 axr1 〉 axr1 〉 msg1 〉 wild type. The msg1 mutant had epinastic leaves and axr1 had wrinkled leaves; leaves of the msg1 axr1 double mutants were epinastic and wrinkled. These results suggest that MSG1 and AXR1 act independently in separate pathways of the reactions tested in the present study. In contrast, the phenotype of the msg1 aux1 double mutants shows that AUX1 is not significantly involved in these phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250050493
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  • 2
    Electronic Resource
    Electronic Resource
    Photochemical formal [4π + 2π + 2π] cycloreversion of 7,8-diaza-3-oxatricyclo[4.2.102,5]non-7-enes (1995)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 8 (1995), S. 799-804 
    Details
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The photolysis and thermolysis of 7,8-diaza-3-oxatricyclo[4.2.1.02,5]non-7-enes were studied. Photolysis showed a novel [4π + 2π + 2π] cycloreversion in a formal way, the first example in azoalkane chemistry. This cycloreversion was found to be sensitized by the benzophenone produced. In contrast, thermolysis showed the typical decomposition pattern of azoalkanes, extrusion of nitrogen and subsequent σ-bond formation of the resulting biradical to afford the tricyclic oxetanes
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/poc.610081206
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