scholarly journals Impact of the Carbon and Nitrogen Supply on Relationships and Connectivity between Metabolism and Biomass in a Broad Panel of Arabidopsis Accessions

2013 ◽  
Vol 162 (1) ◽  
pp. 347-363 ◽  
Author(s):  
Ronan Sulpice ◽  
Zoran Nikoloski ◽  
Hendrik Tschoep ◽  
Carla Antonio ◽  
Sabrina Kleessen ◽  
...  
Keyword(s):  
Nitrogen Supply ◽  
Carbon And Nitrogen

Foliar application of nitrate or ammonium as sole nitrogen supply in Ricinus communis I. Carbon and nitrogen uptake and inflows.

1998 ◽  
Vol 138 (4) ◽  
pp. 675-687 ◽  
Author(s):  
ANDREAS D. PEUKE ◽  
W. DIETER JESCHKE ◽  
KARL-JOSEF DIETZ ◽  
LUKAS SCHREIBER ◽  
WOLFRAM HARTUNG
Keyword(s):  
Nitrogen Uptake ◽  
Foliar Application ◽  
Ricinus Communis ◽  
Nitrogen Supply ◽  
Carbon And Nitrogen

scholarly journals Accumulation of Amino Acids and Flavonoids in Young Tea Shoots Is Highly Correlated With Carbon and Nitrogen Metabolism in Roots and Mature Leaves

2021 ◽  
Vol 12 ◽  
Author(s):  
Jianwei Liu ◽  
Meiya Liu ◽  
Hanhan Fang ◽  
Qunfeng Zhang ◽  
Jianyun Ruan
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Nitrogen Supply ◽  
Carbon And Nitrogen ◽  
Mature Leaves ◽  
N Supply ◽  
Carbon And Nitrogen Metabolism ◽  
Highly Correlated ◽  
Related Compounds

The quality of tea product and the metabolism of quality-related compounds in young shoots are significantly affected by the nitrogen(N) supply. However, little is known of the metabolic changes that take place in tea roots and mature leaves under different supplies, which has a large effect on the accumulation of quality-related compounds in young shoots. In this study, young shoots, mature leaves, and roots under different N conditions were subjected to metabolite profiling using gas chromatography and ultraperformance liquid chromatography, coupled with quadrupole time-of-flight mass spectrometry. The contents of free amino acids (e.g., theanine and glutamate) involved in N metabolism were significantly greater under high N than under low N, while a high N supply reduced soluble sugars (e.g., glucose) in all three tissues. Organic acids (e.g., malate, fumarate, α-ketoglutatare, and succinate) involved in tricarboxylic acid cycle remarkably increased as the nitrogen supply increased, which confirms that carbon (C) allocation was restricted by increasing the nitrogen supply, especially in mature leaves. RT-PCR results indicated that gene expression related to nitrogen assimilation significantly increased in roots with increasing nitrogen supply, which had a significant positive relationship with the level of free amino acids in young shoots. In addition, the expression of most genes involved in flavonoid synthesis was significantly upregulated under conditions of low nitrogen supply relative to high nitrogen supply in young shoot and roots. These data suggest that enhanced assimilation of N in tea roots and the coordinated regulation of C (sugars, organic acids, and flavonoids) and N(amino acids) in mature leaves can lead to a high accumulation of amino acids in young shoots. Furthermore, as the N supply increased, more C was partitioned into compounds containing N in mature leaves and roots, resulting in a decrease in flavonoids in young shoots. In conclusion, the accumulation of amino acids and flavonoids in young tea shoots is highly correlated with carbon and nitrogen metabolism in roots and mature leaves.

Nitrogen metabolism in durum wheat under salinity: accumulation of proline and glycine betaine

2008 ◽  
Vol 35 (5) ◽  
pp. 412 ◽  
Author(s):  
Petronia Carillo ◽  
Gabriella Mastrolonardo ◽  
Francesco Nacca ◽  
Danila Parisi ◽  
Angelo Verlotta ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Glycine Betaine ◽  
Nitrogen Nutrition ◽  
Compatible Solutes ◽  
Glutamate Synthase ◽  
Nitrogen Supply ◽  
Carbon And Nitrogen ◽  
Young Leaves ◽  
Prolonged Stress ◽  
Low Nitrogen

We studied the effect of salinity on amino acid, proline and glycine betaine accumulation in leaves of different stages of development in durum wheat under high and low nitrogen supply. Our results suggest that protective compounds against salt stress are accumulated in all leaves. The major metabolites are glycine betaine, which preferentially accumulates in younger tissues, and proline, which is found predominantly in older tissues. Proline tended to accumulate early, at the onset of the stress, while glycine betaine accumulation was observed during prolonged stress. Nitrate reductase (NR) and glutamate synthase (GOGAT) are positively correlated with these compatible solutes: proline is associated with NR in the oldest leaves of high-nitrate plants and glycine betaine is associated with GOGAT in the youngest leaves of both low- and high-nitrate plants. In high-nitrate conditions proline accounts for more than 39% of the osmotic adjustment in the cytoplasmic compartments of old leaves. Its nitrogen-dependent accumulation may offer an important advantage in that it can be metabolised to allow reallocation of energy, carbon and nitrogen from the older leaves to the younger tissues. The contribution of glycine betaine is higher in young leaves and is independent of nitrogen nutrition.

Carbon and Nitrogen Supply during Seed Filling and Leaf Senescence in Soybean

Crop Science ◽  
1995 ◽  
Vol 35 (4) ◽  
pp. 1063-1069 ◽  
Author(s):  
R. Hayati ◽  
D. B. Egli ◽  
S. J. Crafts‐Brandner
Keyword(s):  
Leaf Senescence ◽  
Nitrogen Supply ◽  
Seed Filling ◽  
Carbon And Nitrogen

Carbon and nitrogen supply to the underground orchid, Rhizanthella gardneri

2010 ◽  
Vol 186 (4) ◽  
pp. 947-956 ◽  
Author(s):  
Jeremy J. Bougoure ◽  
Mark C. Brundrett ◽  
Pauline F. Grierson
Keyword(s):  
Nitrogen Supply ◽  
Carbon And Nitrogen
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