60. 花粉形成阻害物質aspterric acidとIAAの相互作用

概要

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The plant hormone auxin has wide-ranging effects on growth and development throughout the plant. Auxin is known to act as a morphogen directing regional patterning in the developing gynoecium of Arabidopsis thaliana, but is not known to play a role in the developing androecium. This study uses a technique of applying a pollen growth inhibitor, aspterric acid (AA), to developing Arabidopsis flowers to further characterize the role of auxin in organogenesis. AA, isolated from the fungus Aspergillus terreus, inhibits pollen development at meiosis. Application of indole-3-acetic acid (IAA) with AA results in the recovery of the normal pollen development. In contrast, application of gibberellin (GA_3) with AA do not induce the normal pollen growth. In addition, application of different concentrations of IAA with AA reveal to shorten the period of growth from bolting to first flowering as compared to that treated with AA alone. Furthermore, stem length and the number of flower buds treated with IAA and AA were similar to those of control. These results suggest that IAA may play an important role in pollen development of A. thaliana.
植物化学調節学会の論文
2004-10-13