Character of growth correlations in Arabidopsis abruptus mutant with deteriorated auxin transport

  • Elena Sharova Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya nab., 7–9, Saint Petersburg, 199034, Russian Federation https://orcid.org/0000-0003-2746-1993
  • Andrey Lipchinski Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya nab., 7–9, Saint Petersburg, 199034, Russian Federation

Abstract

Internodes of inflorescence stems of wild-type (wt) A. thaliana and abruptus (abr) mutant with deteriorated polar auxin transport had similar axial growth gradients, elongating by their 5–6 mm long subnodal part. Pin-formed shoots of abr plants had less steep axial growth gradient. Basipetal growth retardation was accompanied by cell-wall elastic and plastic extensibility decrease and cell-wall peroxidase activity increase. So, the growth retardation can be caused by cell-wall stiffening resulted from peroxidase-dependent oxidative cross-linking of polymers. Inflorescence stems of abr had evidently overlapping growth periods of successive internodes which suggested participation of polar auxin transport in the correlative inhibition of internodes growth.

Keywords:

Arabidopsis thaliana, pinoid mutant, polar auxin transport, growth correlations, cell-wall extensibility, peroxidases

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Published
2012-09-03
How to Cite
Sharova, E., & Lipchinski, A. (2012). Character of growth correlations in <em>Arabidopsis abruptus</em&gt; mutant with deteriorated auxin transport. Biological Communications, (3), 60–67. Retrieved from https://biocomm.spbu.ru/article/view/3356
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