Asparagine and sugars are both required to sustain secondary axis elongation after bud outgrowth in Rosa hybrida
Jazyk angličtina Země Německo Médium print-electronic
Typ dokumentu časopisecké články
PubMed
29353122
DOI
10.1016/j.jplph.2017.12.013
PII: S0176-1617(17)30309-7
Knihovny.cz E-zdroje
- Klíčová slova
- Amino acids, Asparagine, Axis elongation, Bud outgrowth, Nitrogen, Sucrose,
- MeSH
- asparagin metabolismus MeSH
- biologický transport MeSH
- cytokininy metabolismus MeSH
- dusík metabolismus MeSH
- kořeny rostlin metabolismus MeSH
- regulátory růstu rostlin metabolismus MeSH
- Rosa růst a vývoj metabolismus MeSH
- sacharosa metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- asparagin MeSH
- cytokininy MeSH
- dusík MeSH
- regulátory růstu rostlin MeSH
- sacharosa MeSH
Nitrogen is required for optimal plant growth, especially in young organs such as secondary axes (axes II) after axillary bud outgrowth. Several studies have shown an increase of nitrogen concentration in xylem sap concomitantly with bud outgrowth, but the relation between nitrogen, sugars and plant hormones in axis II still remains unclear. We investigated in Rosa hybrida the involvement of nitrogen nutrition in axis II elongation in relation with sugars and cytokinins using 15N-labeled nitrate and sugars, amino acids and cytokinin quantifications. Besides, we measured the effect of the exogenous supply of these compounds on axis II elongation using in vitro excised bud culture. We demonstrated that nitrogen in the axis II comes mainly from new root uptake after decapitation. Asparagine, which concentration increases in sap exudates and tissues during axis II elongation, was the sole amino acid able to sustain an efficient elongation in vitro when supplied in combination with sucrose.
Institut Jean Pierre Bourgin Centre de Versailles Grignon INRA Agro ParisTech CNRS Versailles France
Citace poskytuje Crossref.org
Sucrose promotes stem branching through cytokinin
