Elevated Carbon Dioxide and Chronic Warming Together Decrease Nitrogen Uptake Rate, Net Translocation, and Assimilation in Tomato
In: Plants, Jg. 10 (2021-04-01), Heft 4, S. 722-722
Online
academicJournal
Zugriff:
The response of plant N relations to the combination of elevated CO2 (eCO2) and warming are poorly understood. To study this, tomato (Solanum lycopersicum) plants were grown at 400 or 700 ppm CO2 and 33/28 or 38/33 °C (day/night), and their soil was labeled with 15NO3− or 15NH4+. Plant dry mass, root N-uptake rate, root-to-shoot net N translocation, whole-plant N assimilation, and root resource availability (%C, %N, total nonstructural carbohydrates) were measured. Relative to eCO2 or warming alone, eCO2 + warming decreased growth, NO3− and NH4+-uptake rates, root-to-shoot net N translocation, and whole-plant N assimilation. Decreased N assimilation with eCO2 + warming was driven mostly by inhibition of NO3− assimilation, and was not associated with root resource limitations or damage to N-assimilatory proteins. Previously, we showed in tomato that eCO2 + warming decreases the concentration of N-uptake and -assimilatory proteins in roots, and dramatically increases leaf angle, which decreases whole-plant light capture and, hence, photosynthesis and growth. Thus, decreases in N uptake and assimilation with eCO2 + warming in tomato are likely due to reduced plant N demand.
Titel: |
Elevated Carbon Dioxide and Chronic Warming Together Decrease Nitrogen Uptake Rate, Net Translocation, and Assimilation in Tomato
|
---|---|
Autor/in / Beteiligte Person: | Jayawardena, Dileepa M. ; Heckathorn, Scott A. ; Rajanayake, Krishani K. ; Boldt, Jennifer K. ; Isailovic, Dragan |
Link: | |
Zeitschrift: | Plants, Jg. 10 (2021-04-01), Heft 4, S. 722-722 |
Veröffentlichung: | MDPI AG, 2021 |
Medientyp: | academicJournal |
ISSN: | 1004-0722 (print) ; 2223-7747 (print) ; 8910-2304 (print) |
DOI: | 10.3390/plants10040722 |
Schlagwort: |
|
Sonstiges: |
|