Nitrogen metabolism in tomato seedlings

1985 ◽  
Vol 85 (3) ◽  
pp. 395-402 ◽  
Author(s):  
Y. M. S. Maghrabi ◽  
A. E. Younis ◽  
F. S. Abozinah
Keyword(s):  
Nitrogen Metabolism ◽  
Tomato Seedlings

Nitrogen metabolism in tomato seedlings

1985 ◽  
Vol 85 (3) ◽  
pp. 403-411 ◽  
Author(s):  
Y. M. S. Maghrabi ◽  
A. E. Younis ◽  
F. S. Abozinah
Keyword(s):  
Nitrogen Metabolism ◽  
Tomato Seedlings

scholarly journals Beneficial Role of Exogenous Spermidine on Nitrogen Metabolism in Tomato Seedlings Exposed to Saline-alkaline Stress

2013 ◽  
Vol 138 (1) ◽  
pp. 38-49 ◽  
Author(s):  
Yi Zhang ◽  
Xiao-Hui Hu ◽  
Yu Shi ◽  
Zhi-Rong Zou ◽  
Fei Yan ◽  
...  
Keyword(s):  
Plant Growth ◽  
Nitrogen Metabolism ◽  
Glutamate Synthase ◽  
Differential Sensitivity ◽  
Nitrate Content ◽  
Alkaline Stress ◽  
Metabolic Disturbances ◽  
Tomato Seedlings ◽  
Exogenous Spermidine

We studied the effects of exogenous spermidine (Spd) on plant growth and nitrogen metabolism in two cultivars of tomato (Solanum lycopersicum) that have differential sensitivity to mixed salinity-alkalinity stress: ‘Jinpeng Chaoguan’ (salt-tolerant) and ‘Zhongza No. 9’ (salt-sensitive). Seedling growth of both tomato cultivars was inhibited by salinity-alkalinity stress, but Spd treatment alleviated the growth reduction to some extent, especially in ‘Zhongza No. 9’. Exogenous Spd may help reduce stress-induced increases in free amino acids, ammonium (NH4+) contents, and NADH-dependent glutamate dehydrogenase (NADH-GDH) activities; depress stress-induced decreases in soluble protein and nitrate content; and depress nitrate reductase, nitrite reductase, glutamine synthetase (GS), NADH-dependent glutamate synthase (NADH-GOGAT), glutamate oxaloacetate transaminase (GOT), and glutamate pyruvate transaminase (GPT) activities, especially for ‘Zhongza No. 9’. Based on our results, we suggest that exogenous Spd promotes the assimilation of excess toxic NH4+ by coordinating and strengthening the synergistic action of NADH-GDH, GS/NADH-GOGAT, and transamination pathways, all during saline-alkaline stress. Subsequently, NH4+ and its related enzymes (GDH, GS, GOGAT, GOT, and GPT), in vivo, are maintained in a proper and balanced state to enable mitigation of stress-resulted damages. These results suggest that exogenous Spd treatment can relieve nitrogen metabolic disturbances caused by salinity-alkalinity stress and eventually promote plant growth.

Kinetin Regulates UV-B-Induced Damage to Growth, Photosystem II Photochemistry, and Nitrogen Metabolism in Tomato Seedlings

2017 ◽  
Vol 37 (1) ◽  
pp. 233-245 ◽  
Author(s):  
Gausiya Bashri ◽  
Madhulika Singh ◽  
Rohit Kumar Mishra ◽  
Jitendra Kumar ◽  
Vijay Pratap Singh ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Nitrogen Metabolism ◽  
Tomato Seedlings ◽  
Photosystem Ii Photochemistry

Diethylstilbestrol and Length of Preliminary Period in the Utilization of Crude Biuret and Urea by Lambs. II. Various Aspects of Nitrogen Metabolism

1960 ◽  
Vol 19 (1) ◽  
pp. 44-53 ◽  
Author(s):  
G. A. McLaren ◽  
G. C. Anderson ◽  
J. A. Welch ◽  
C. D. Campbell ◽  
G. S. Smith
Keyword(s):  
Nitrogen Metabolism
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