Extracting relevant physiological information from polar auxin transport data in Panax ginseng
| Autor: | Sander C. Hille, Kees R. Libbenga, Bert van Duijn, Kees J. M. Boot, Henrie A.A.J. Korthout |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Arabidopsis Panax Plant Science 01 natural sciences Plant Roots 03 medical and health sciences chemistry.chemical_compound Ginseng Plant Growth Regulators Auxin heterocyclic compounds chemistry.chemical_classification biology Indoleacetic Acids Plant Stems Chemistry polar transport Panax ginseng food and beverages Biological Transport biology.organism_classification 030104 developmental biology Inflorescence Biophysics indole-3-acetic acid Polar auxin transport auxin Indole-3-acetic acid Agronomy and Crop Science Flux (metabolism) mathematical model 010606 plant biology & botany |
| Zdroj: | Journal of Plant Physiology, 262:153436 |
| ISSN: | 1618-1328 |
| Popis: | Background Measuring polar auxin transport (PAT) in plants and drawing conclusions from the observed transport data is only meaningful if these data are being analysed with a mathematical model which describes PAT. In this report we studied the polar auxin transport in Panax ginseng stems of different age and grown on different substrates. Methods We measured polar IAA transport in stems using a radio labelled IAA and analysed the transport data with a mathematical model we developed for Arabidopsis. Results We found that PAT in ginseng stems, as compared to Arabidopsis inflorescence stems, has a 2-fold lower transport velocity and a 3-fold lower steady state auxin flux. Conclusion We were able to pinpoint two physiological parameters that influenced the observed transport characteristics in ginseng which differ from Arabidopsis, namely an increase in immobilization together with a reduced reflux of IAA from the surrounding tissue back to the transporting cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect