Growth inhibition by selenium is associated with changes in primary metabolism and nutrient levels inArabidopsis thaliana
| Autor: | Flávio Barcellos Cardoso, Welder A. Silva, Auxiliadora O. Martins, Dimas M. Ribeiro, Dalton D. Silva Júnior, Vitor L. Nascimento, Wagner L. Araújo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_classification biology Physiology Chemistry food and beverages Plant Science Photosynthesis biology.organism_classification 01 natural sciences Amino acid Cell wall Citric acid cycle 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology Nutrient Biochemistry Botany Shoot Arabidopsis thaliana Growth inhibition 010606 plant biology & botany |
| Zdroj: | Plant, Cell & Environment. 39:2235-2246 |
| ISSN: | 0140-7791 |
| DOI: | 10.1111/pce.12783 |
| Popis: | Although Selenium (Se) stress is relatively well known for causing growth inhibition, its effects on primary metabolism remain rather unclear. Here, we characterized both the modulation of the expression of specific genes and the metabolic adjustments in Arabidopsis thaliana in response to changes in Se level in the soil. Se treatment culminated with strong inhibition of both shoot and root growth. Notably, growth inhibition in Se-treated plants was associated with an incomplete mobilization of starch during the night. Minor changes in amino acids levels were observed in shoots and roots of plants treated with Se whereas the pool size of tricarboxylic acid (TCA) cycle intermediates in root was not altered in response to Se. By contrast, decreased levels of organic acids involved in the first part of the TCA cycle were observed in shoots of Se-treated plants. Furthermore, decreased expression levels of expansins and endotransglucosylases/endohydrolases (XHTs) genes were observed after Se treatment, coupled with a significant decrease in the levels of essential elements. Collectively, our results revealed an exquisite interaction between energy metabolism and Se-mediated control of growth in Arabidopsis thaliana to coordinate cell wall extension, starch turnover and the levels of a few essential nutrients. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text