Abstract：
BACKGROUND:The coordination between nitrogen (N) and sulfur (S) assimilation is required to suitably provide plants with organic compounds essential for their development and growth. The N source induces the adaptation of many metabolic processes in plants; however, there is scarce information about the influence that it may exert on the functioning of S metabolism. The aim of this work was to provide an overview of N and S metabolism in oilseed rape (Brassica napus) when exposed to different N sources. To do so, plants were grown in hydroponic conditions with nitrate or ammonium as N source at two concentrations (0.5 and 1 mM). RESULTS:Metabolic changes mainly occurred in leaves, where ammonium caused the up-regulation of enzymes involved in the primary assimilation of N and a general increase in the concentration of N-compounds (NH4+, amino acids and proteins). Similarly, the activity of key enzymes of primary S assimilation and the content of S-compounds (glutathione and glucosinolates) were also higher in leaves of ammonium-fed plants. Interestingly, sulfate level was lower in leaves of ammonium-fed plants, which was accompanied by the down-regulation of SULTR1 transporters gene expression. CONCLUSIONS:The results highlight the impact of the N source on different steps of N and S metabolism in oilseed rape, notably inducing N and S assimilation in leaves, and put forward the potential of N source management to modulate the synthesis of compounds with biotechnological interest, such as glucosinolates.
journal_name
BMC Plant Bioljournal_title
BMC plant biologyauthors
Coleto I,de la Peña M,Rodríguez-Escalante J,Bejarano I,Glauser G,Aparicio-Tejo PM,González-Moro MB,Marino Ddoi
10.1186/s12870-017-1100-9subject
Has Abstractpub_date
2017-09-20 00:00:00pages
157issue
1issn
1471-2229pii
10.1186/s12870-017-1100-9journal_volume
17pub_type
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