Growth of Avena coleoptiles and pH drop of protoplast suspensions induced by chlorinated indoleacetic acids

@article{Bttger1978GrowthOA,
  title={Growth of Avena coleoptiles and pH drop of protoplast suspensions induced by chlorinated indoleacetic acids},
  author={Michael B{\"o}ttger and Kjeld C. Engvild and H. Soll},
  journal={Planta},
  year={1978},
  volume={140},
  pages={89-92}
}
Several indoleacetic acids, substituted in the benzene ring, were compared in the Avena straight growth bioassay. 4-Chloroindoleacetic acid, a naturally occurring plant hormone, is one of the strongest hormones in this bioassay. With an optimum at 10-6 mol l-1, it is more active than indoleacetic acid, 2,4-dichlorphenoxyacetic acid and naphthaleneacetic acid. 5-Chloro- and 6-chloroindoleacetic acids are very strong auxins as well. Other derivatives tested have a lower activity. 5,7-Dichloro… CONTINUE READING
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