Asparagine Synthesis During Tobacco Leaf Curing.
asparagine
asparagine synthetases
curing
nitrogen assimilation
senescence
tobacco
Journal
Plants (Basel, Switzerland)
ISSN: 2223-7747
Titre abrégé: Plants (Basel)
Pays: Switzerland
ID NLM: 101596181
Informations de publication
Date de publication:
11 Nov 2019
11 Nov 2019
Historique:
received:
15
10
2019
revised:
01
11
2019
accepted:
05
11
2019
entrez:
14
11
2019
pubmed:
14
11
2019
medline:
14
11
2019
Statut:
epublish
Résumé
Senescence is a genetically controlled mechanism that modifies leaf chemistry. This involves significant changes in the accumulation of carbon- and nitrogen-containing compounds, including asparagine through the activity of asparagine synthetases. These enzymes are required for nitrogen re-assimilation and remobilization in plants; however, their mechanisms are not fully understood. Here, we report how leaf curing-a senescence-induced process that allows tobacco leaves to dry out-modifies the asparagine metabolism. We show that leaf curing strongly alters the concentration of the four main amino acids, asparagine, glutamine, aspartate, and glutamate. We demonstrate that detached tobacco leaf or stalk curing has a different impact on the expression of asparagine synthetase genes and accumulation of asparagine. Additionally, we characterize the main asparagine synthetases involved in the production of asparagine during curing. The expression of
Identifiants
pubmed: 31718005
pii: plants8110492
doi: 10.3390/plants8110492
pmc: PMC6918383
pii:
doi:
Types de publication
Journal Article
Langues
eng
Déclaration de conflit d'intérêts
The work subject of the publication was entirely funded by PMI and all authors are employees of Philip Morris International.
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