| Autor: |
Kacper Dziewit, Aleš Pěnčík, Katarzyna Dobrzyńska, Ondřej Novák, Bożena Szal, Anna Podgórska |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
BMC Plant Biology, Vol 21, Iss 1, Pp 1-13 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1471-2229 |
| DOI: |
10.1186/s12870-021-03385-9 |
| Popis: |
Abstract Background The plant hormone auxin is a major coordinator of plant growth and development in response to diverse environmental signals, including nutritional conditions. Sole ammonium (NH4 +) nutrition is one of the unique growth-suppressing conditions for plants. Therefore, the quest to understand NH4 +-mediated developmental defects led us to analyze auxin metabolism. Results Indole-3-acetic acid (IAA), the most predominant natural auxin, accumulates in the leaves and roots of mature Arabidopsis thaliana plants grown on NH4 +, but not in the root tips. We found changes at the expressional level in reactions leading to IAA biosynthesis and deactivation in different tissues. Finally, NH4 + nutrition would facilitate the formation of inactive oxidized IAA as the final product. Conclusions NH4 +-mediated accelerated auxin turnover rates implicate transient and local IAA peaks. A noticeable auxin pattern in tissues correlates with the developmental adaptations of the short and highly branched root system of NH4 +-grown plants. Therefore, the spatiotemporal distribution of auxin might be a root-shaping signal specific to adjust to NH4 +-stress conditions. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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