Involvement of boron transporter BOR1 in growth under low boron and high nitrate conditions in Arabidopsis thaliana
| Autor: | Wenna Zhang, Qing Wang, Lihong Gao, Toru Fujiwara, Kyoko Miwa, Hua Xiao, Marcel Pascal Beier, Junpei Takano, Naoyuki Sotta |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
0106 biological sciences 0301 basic medicine Physiology Potassium Mutant Arabidopsis chemistry.chemical_element Plant Science 01 natural sciences Plant Roots Antiporters 03 medical and health sciences chemistry.chemical_compound Genetics Arabidopsis thaliana Ammonium Boron Messenger RNA Nitrates biology Chemistry Arabidopsis Proteins organic chemicals food and beverages Xylem Transporter Cell Biology General Medicine biology.organism_classification Molecular biology 030104 developmental biology Efflux 010606 plant biology & botany |
| Zdroj: | Physiologia plantarumREFERENCES. 171(4) |
| ISSN: | 1399-3054 |
| Popis: | BOR1 is an efflux transporter of boron (B), responsible for loading B into the xylem. It has been reported that nitrate (NO3 - ) concentrations significantly influence B concentrations in leaves and BOR1 mRNA accumulation in roots. Here, to unravel the interactive effects of B and NO3 - on plant growth and the function of BOR1 under the combination of B and NO3 - , seedling growth was analyzed in Col-0 and bor1 mutants. The growth of bor1 mutants was negatively affected by high NO3 - but neither by potassium chloride (KCl) nor ammonium (NH4 + ) under low B conditions, suggesting the involvement of BOR1 in growth under high NO3 - . Mutants of bor2 and bor4 did not exhibit such growth responses, suggesting that this effect was specific to BOR1 among the BORs tested. Under low B conditions, loss of the BOR1 function led to a more significant decrease in B concentrations in the presence of high NO3 - compared to normal NO3 - . Additionally, grafting experiments demonstrated that these effects of NO3 - occurred when BOR1 is absent in roots. High NO3 - treatment elevated BOR1 mRNA accumulation while the BOR1 protein accumulation was downregulated. These apparent opposite responses indicated that the transcriptional and (post-)translational regulations follow different patterns. Our work provides evidence of a novel regulation of BOR1 and another B transport system by both B and NO3 - in an interactive manner. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text