scholarly journals Arginine and nitrogen mobilization in cyanobacteria

2019 ◽  
Vol 111 (4) ◽  
pp. 863-867 ◽  
Author(s):  
Hao Zhang ◽  
Chen Yang
Keyword(s):  
Nitrogen Mobilization

scholarly journals Ethephon Activates the Transcription of Senescence-Associated Genes and Nitrogen Mobilization in Grapevine Leaves (Vitis vinifera cv. Riesling)

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 333
Author(s):  
Maximilian Hendgen ◽  
Stefan Günther ◽  
Sven Schubert ◽  
Otmar Löhnertz
Keyword(s):  
Vitis Vinifera ◽  
Leaf Senescence ◽  
Methodological Approach ◽  
Leaf Transcriptome ◽  
Berry Ripening ◽  
Model Plant Arabidopsis Thaliana ◽  
N Remobilization ◽  
Grapevine Leaves ◽  
Nitrogen Mobilization ◽  
Leaf N

Nitrogen (N) remobilization in the context of leaf senescence is of considerable importance for the viability of perennial plants. In late-ripening crops, such as Vitis vinifera, it may also affect berry ripening and fruit quality. Numerous studies on the model plant Arabidopsis thaliana have confirmed an involvement of the plant hormone ethylene in the regulation of senescence. However, ethylene research on grapevine was mostly focused on its involvement in berry ripening and stress tolerance until now. To investigate the effect of ethylene on the initiation, regulation, and progress of senescence-dependent N mobilization in grapevine leaves, we treated field-grown Vitis vinifera cv. Riesling vines with 25 mM ethephon at the end of berry ripening. Ethephon induced premature chlorophyll degradation and caused a shift of the leaf transcriptome equivalent to developmental leaf senescence. The upregulated metabolic processes covered the entire N remobilization process chain, altered the amino acid composition in the leaves, and resulted in an average 60% decrease in leaf N. Our findings increase the fundamental knowledge about the initiation and manipulation of leaf N remobilization in perennial woody plants by ethephon. This offers a methodological approach to the targeted induction of senescence and thus to an improvement in the N supply of grapes.

Role of Neurohumors in the Action of the Adrenal Cortical Steroids: Protein Mobilization

1958 ◽  
Vol 194 (3) ◽  
pp. 481-484 ◽  
Author(s):  
Ira G. Wool ◽  
M. S. Goldstein
Keyword(s):  
Functional Relationship ◽  
Nitrogen Excretion ◽  
Adrenal Steroids ◽  
Protein Mobilization ◽  
Reduced Nitrogen ◽  
Nitrogen Mobilization

Phlorhizin diabetes was induced in rats to promote nitrogen mobilization. Adrenalectomy reduced nitrogen excretion and small permissive amounts of cortical steroids restored this capacity. Because of the previously demonstrated functional relationship between the autonomic-medullary neurohumors and the adrenal cortical steroids, the sympathetic amines were examined for their possible role as the effector agents in protein mobilization. The results were uniformly negative, indicating that the adrenal steroids support some agency other than the epinephrines in promoting nitrogen mobilization.

Spatial and temporal small-scale variability of nitrogen mobilization in a forest ecosystem with high N deposition in NW-Germany

2010 ◽  
Vol 158 (2) ◽  
pp. 424-439 ◽  
Author(s):  
Carsten Lorz ◽  
Christel Eissner ◽  
Jürgen Lethmate ◽  
Birgit Schneider
Keyword(s):  
Forest Ecosystem ◽  
N Deposition ◽  
Small Scale ◽  
Nw Germany ◽  
Nitrogen Mobilization

Reduced atmospheric CO2 inhibits nitrogen mobilization in Festuca rubra

2002 ◽  
Vol 116 (1) ◽  
pp. 62-72 ◽  
Author(s):  
Barry Thornton ◽  
Eric Paterson ◽  
Alison H. Kingston-Smith ◽  
Andrea L. Bollard ◽  
Shona M. Pratt ◽  
...  
Keyword(s):  
Atmospheric Co2 ◽  
Festuca Rubra ◽  
Nitrogen Mobilization
Sign in / Sign up

Export Citation Format

Share Document