Requirement of the Auxin Polar Transport System in Early Stages of Arabidopsis Floral Bud Formation.

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ID: 298580
1991
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Abstract
The pin-formed mutant pin 1-1, one of the Arabidopsis flower mutants, has several structural abnormalities in inflorescence axes, flowers, and leaves. In some cases, pin1-1 forms a flower with abnormal structure (wide petals, no stamens, pistil-like structure with no ovules in the ovary) at the top of inflorescence axes. In other cases, no floral buds are formed on the axes. An independently isolated allelic mutant (pin1-2) shows similar phenotypes. These mutant phenotypes are exactly the same in wild-type plants cultured in the presence of chemical compounds known as auxin polar transport inhibitors: 9-hydroxyfluorene-9-carboxylic acid or N-(1-naphthyl)phthalamic acid. We tested the polar transport activity of indole-3-acetic acid and the endogenous amount of free indole-3-acetic acid in the tissue of inflorescence axes of the pin1 mutants and wild type. The polar transport activity in the pin 1-1 mutant and in the pin1-2 mutant was decreased to 14% and 7% of wild type, respectively. These observations strongly suggest that the normal level of polar transport activity in the inflorescence axes is required in early developmental stages of floral bud formation in Arabidopsis and that the primary function of the pin1 gene is auxin polar transport in the inflorescence axis.
Reference Key
openalex_W2109800411 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors K. Okada, Jun‐ya Ueda, Masako Komaki, Callum J. Bell, Y. Shimura
Journal The Plant cell
Year 1991
DOI
10.1105/tpc.3.7.677
URL
https://doi.org/10.1105/tpc.3.7.677
Keywords Keywords not found

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