Probing a Membrane Matrix Regulating Hormone Action: I. The Molecular Length of Effective Lipids 1

AUTOR(ES)

Stowe, Bruce B.

RESUMO

Auxin-induced pea (Pisum sativum) stem section elongation is enhanced at levels of 3 to 40 micromolar by six new classes of alkane derivatives additional to those described earlier, providing that length of their molecules exceeds 20 A. Increasingly longer homologous series of alkyl chlorides, bromides and iodides, alkyl benzenes, dialkyl ethers, and sulfides show a logarithmically linear increase in specific activity above this length, reaching an optimum near 28 to 30 Å. Longer dialkyl ethers and sulfides are less effective, while steroids, or alkanes with substituents at both ends, are ineffective.

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