NDLI: Nitrate supply and plant development influence nitrogen uptake and allocation under elevated CO$

Content Provider	SpringerLink
Author	Vicente, Rubén Pérez, Pilar Martínez Carrasco, Rafael Gutiérrez, Elena Morcuende, Rosa
Copyright Year	2015
Abstract	Growth in elevated CO$_{2}$ often leads to decreased plant nitrogen contents and down-regulation of photosynthetic capacity. Here, we investigated whether elevated CO$_{2}$ limits nitrogen uptake when nutrient movement to roots is unrestricted, and the dependence of this limitation on nitrogen supply and plant development in durum wheat (Triticum durum Desf.). Plants were grown hydroponically at two N supplies and ambient and elevated CO$_{2}$ concentrations. Elevated CO$_{2}$ decreased nitrate uptake per unit root mass with low N supply at early grain filling, but not at anthesis. This decrease was not associated with higher nitrate or amino acid, or lower non-structural carbohydrate contents in roots. At anthesis, elevated CO$_{2}$ decreased the nitrogen content of roots with both levels of N and that of aboveground organs with high N. With low N, elevated CO$_{2}$ increased N allocation to aboveground plant organs and nitrogen concentration per unit flag leaf area at anthesis, and per unit aboveground dry mass at both growth stages. The results from the hydroponic experiment suggest that elevated CO$_{2}$ restricts nitrate uptake late in development, high N supply overriding this restriction. Increased nitrogen allocation to young leaves at low N supply could alleviate photosynthetic acclimation to elevated CO$_{2}$.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	37
Issue Number	6
e-ISSN	18611664
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-27
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Acclimation Elevated CO$_{2}$ Nitrate uptake Nitrogen Nitrogen allocation Triticum durum Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Physiology Plant Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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