2008
DOI: 10.1016/s1002-0160(08)60061-2
|View full text |Cite
|
Sign up to set email alerts
|

Effect of Nitrate on Activities and Transcript Levels of Nitrate Reductase and Glutamine Synthetase in Rice

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

6
34
0
1

Year Published

2011
2011
2022
2022

Publication Types

Select...
6
2

Relationship

0
8

Authors

Journals

citations
Cited by 60 publications
(42 citation statements)
references
References 37 publications
6
34
0
1
Order By: Relevance
“…The main enzymes involved are glutamate synthase (GS), or glutamine-2-oxoglutarate amino transferase (GOGAT), and glutamate dehydrogenase (GDH) (Mokhele et al, 2012). Cao, Fan, Sun, Xu, Hu & Shen (2008), found that GS has a vital role in NH 4 + assimilation and the activity of the enzyme is considered critical and possibly ratelimiting step in NH 4 + assimilation. Ammonium may be toxic to plants, because it can cause proton extrusion, which is associated with NH 4 + uptake, changes in cytosolic pH and uncoupling of photophosphorylation in plants (Wang et al, 2007).…”
Section: Discussionmentioning
confidence: 99%
“…The main enzymes involved are glutamate synthase (GS), or glutamine-2-oxoglutarate amino transferase (GOGAT), and glutamate dehydrogenase (GDH) (Mokhele et al, 2012). Cao, Fan, Sun, Xu, Hu & Shen (2008), found that GS has a vital role in NH 4 + assimilation and the activity of the enzyme is considered critical and possibly ratelimiting step in NH 4 + assimilation. Ammonium may be toxic to plants, because it can cause proton extrusion, which is associated with NH 4 + uptake, changes in cytosolic pH and uncoupling of photophosphorylation in plants (Wang et al, 2007).…”
Section: Discussionmentioning
confidence: 99%
“…Sakakibara et al (1992) reported that GS enzyme is induced within 30 minutes of nitrate addition, indicating that this enzyme is induced directly by nitrate application. In addition to this, it was observed that GS activity was 0.5Á2-fold higher in plants able to grow at low N levels than plants growing at high N levels (Cao et al 2008). It appears reasonable to conclude that high GS activity in the chloroplasts would be the key to detoxifying ammonium by incorporating it into amino acids as the sink for ammonium and carbohydrate, as well as an excellent biochemistry parameter for a genetic screening program to obtain efficient nitrogen assimilating genotypes (Brauer and Shelp 2010).…”
Section: Expression Of Nr and Gs Gene Familiesmentioning
confidence: 84%
“…In LNE genotypes, GS activity was sufficiently high to maintain a low level of ammonium in leaf tissues irrespective of external N supply that explains the increase in activity of GS with increase in N supply. In addition to this, it was observed that GS activity was two-folds higher in plants growing at low N levels than plants growing at high N levels (Cao et al 2008). It appears reasonable to conclude that high GS activity in the chloroplasts would be a key point to detoxify ammonium by incorporating it into amino acids as the sink for ammonium and carbohydrate as well as an excellent biochemistry parameter for a genetic screening program to obtain nitrogen assimilating efficient genotypes (Magalha˜es et al 1993).…”
Section: Nitrate Assimilatory Enzymesmentioning
confidence: 85%
See 1 more Smart Citation
“…A interferência das formas de nitrogênio na atividade da enzima redutase do nitrato foi demonstrada por Yang et al (2012), que verificaram ter o fornecimento de doses de ureia incrementado a atividade da enzima redutase do nitrato em folhas de arroz. Também, Cao et al (2008) encontraram mais elevadas produção de biomassa e atividade da enzima redutase do nitrato quando plantas de arroz foram supridas com nitrato+amônio, do que com a aplicação isolada dessas formas de nitrogênio, assim como observado no presente experimento. Da mesma forma, Timpo e Neyra (1983) encontraram, em folhas de Phaseolus vulgaris, valores mais baixos de atividade da enzima redutase do nitrato em plantas supridas com amônio do que com ureia como formas exclusivas de nitrogênio.…”
Section: Concentrações De Poliaminas E De Prolinaunclassified