Salinity and nitrogen fertilization and nitrogen metabolism in rose plants

Lorenzo, Helena Carvalho De; Siverio, José M.; Caballero, María Ángeles Axpe

doi:10.1017/s0021859601001150

Cited by 20 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nitrate reductase (NR), which catalyses reduction of nitrate to nitrite, is recognized as the rate-limiting step of the nitrate assimilation pathway (Campbell 1999). Nitrate reductase is responsive to metabolic and physiological status of plants, hence it is used often as an indicator of plant stress (Campbell 1988;Lorenzo et al 2001). Regarding leaf NR activity, we observed a marked decrease of NR activity under saline conditions, which remains in agreement with our previous investigations (Saca³a et al 2002) and numerous literature data (Gouia et al 1994;Omarov et al 1998;Silveira et al 2001).…”

Section: Discussionsupporting

confidence: 90%

Effect of NaCI and supplemental calcium on growth parameters and nitrate reductase activity in maize

et al. 2011

View full text Add to dashboard Cite

In this study, investigated were the effects of NaCl (60 mmol·dm -3 ) and NaCl supplemented with different salts (5 mmol·dm -3 CaCl 2 , CaSO 4 , CaCO 3 , KCl), on growth of two maize varieties (Cyrkon and Limko). After 7 days of cultivation in nutrient solution the growth response to salinity of both maize varieties was similar. NaCl led to a dramatic decrease in growth of plants (approx. 50% reduction in fresh and dry weight of root, and 70% reduction in fresh weight of shoot). Addition of extra Ca 2+ or K + to nutrient solution containing NaCl did not definitely improve the growth parameters of maize. However, among the tested salts, CaCl 2 had a beneficial visual effect on maize seedlings. In other cases the plants showed noticeable symptoms of salt damage. In long term exposure to salinity (two weeks) growth of Cyrkon was more inhibited than Limko. Comparison of growth responses in short-term exposure to salinity (7 days) with long-term (14 days) showed that in Cyrkon variety the negative effects of NaCl were intensified and addition of CaCl 2 to salinized solution had not positive effects on growth. On the contrary, in Limko variety, there was a significant improvement in growth (especially in root dry weight). This fact indicates that during longer exposure to salinity Limko was able to adapt to those conditions. Salinity caused a significant decrease in leaf nitrate reductase activity (60% and 30% reduction respectively in Limko and Cyrkon). Addition of CaCl 2 to salinized nutrient solution resulted in greater enzyme inhibition in Cyrkon (50% decline in relation to plants grown under sole NaCl), and 30% increase in Limko. Inhibition of nitrate reductase activity did not cause a decrease in concentration of soluble protein in maize leaves.

show abstract

Section: Discussionsupporting

confidence: 90%

Effect of NaCI and supplemental calcium on growth parameters and nitrate reductase activity in maize

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Table 4 shows that N application significantly increased root, shoot, and fruit P uptake due to the well known positive interaction between N and P. Table 4 shows a significant positive response to N application at salinity levels in tomato fruit due to the positive N-P interaction; however, the differences at 60 mM salinity level were not statistically significant. Lorenzo et al (2001) reported that N treatment can be used to maintain a constant uptake of H 2 PO 4 −1 even in saline conditions in rose plants.…”

Section: Resultsmentioning

confidence: 99%

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Zahedifar

Ronaghi

Moosavi

et al. 2012

Journal of Plant Nutrition

View full text Add to dashboard Cite

2 Tomato seedlings were transferred to continuously, aerated plastic containers. Treatments consisted of three nitrogen (N) levels [0, 1.5, and 3% as ammonium chloride (NH 4 Cl) and ammonium phosphate (NH 4 H 2 PO 4 ) 2:1 w/w] and three salinity levels (0, 30, and 60 mM using sodium chloride (NaCl) and calcium chloride (CaCl 2 )]. Results indicated significant positive and negative responses in fruits fresh weight to nitrogen and salinity treatments, respectively. Number of fruits and root length decreased at high salinity level. Phosphorus (P) content was highest in fruits and lowest in roots. Fruit P uptake decreased with salinity applications in N controls. At low salinity levels, N application mitigated the salinity detrimental effects; however, such an effect was not observed at the high salinity level. Nitrogen application significantly decreased iron, zinc, copper, and manganese concentration and uptake. Application of nitrogen and salinity levels significantly increased the citric acid content of tomato fruits. Vitamin C content of fruits was neither influenced by nitrogen nor by salinity.

show abstract

“…European ash (Fraxinus excelsior L.) and English oak exhibited similar NRA when fertilized with NH 4 NO 3 or NO 3 - (Stadler et al 1993). One-year-old rose (Rosa hybrida L.) seedlings treated with NO 3 -had more NRA in leaves than controls, but less NRA for similar plants treated with NH 4 + (Lorenzo et al 2001), which suggests NRA was NO 3 --induced and NH 4 + -repressed. Raspberry (Rubus idaeus L.) had greater NRA with NO 3 -than NH 4 + in roots, but had comparable rates of NRA in leaves (Claussen and Lenz 1999).…”

Section: Nitrogen Level Effects On Growth and Physiologymentioning

confidence: 99%

Nitrate reductase activity and nitrogen compounds in xylem exudate of Juglans nigra seedlings: relation to nitrogen source and supply

Nicodemus

Salifu

Jacobs

2008

Trees

View full text Add to dashboard Cite

Nitrogen (N) limits plant productivity and its uptake and assimilation may be regulated by N source, N availability, and nitrate reductase activity (NRA). Knowledge of how these factors interact to affect N uptake and assimilation processes in woody angiosperms is limited. We fertilized 1-year-old, half-sib black walnut (Juglans nigra L.) seedlings with ammonium (NH 4 + ) [as (NH 4 ) 2 SO 4 ], nitrate (NO 3 -) (as NaNO 3 ), or a mixed N source (NH 4 NO 3 ) at 0, 800, or 1,600 mg N plant -1 season -1. Two months following final fertilization, growth, in vivo NRA, plant N status, and xylem exudate N composition were assessed. Specific leaf NRA was higher in NO 3 --fed and NH 4 NO 3 -fed plants compared to observed responses in NH 4 + -fed seedlings. Regardless of N source, N addition increased the proportion of amino acids (AA) in xylem exudate, inferring greater NRA in roots, which suggests higher energy cost to plants. Root total NRA was 37% higher in NO 3 --fed than in NH 4 + -fed plants. Exogenous NO 3 -was assimilated in roots or stored, so no difference was observed in NO 3 -levels transported in xylem. Black walnut seedling growth and physiology were generally favored by the mixed N source over NO 3 -or NH 4 + alone, suggesting NH 4 NO 3 is required to maximize productivity in black walnut. Our findings indicate that black walnut seedling responses to N source and level contrast markedly with results noted for woody gymnosperms or herbaceous angiosperms.

show abstract

Salinity and nitrogen fertilization and nitrogen metabolism in rose plants

Cited by 20 publications

References 0 publications

Effect of NaCI and supplemental calcium on growth parameters and nitrate reductase activity in maize

Effect of NaCI and supplemental calcium on growth parameters and nitrate reductase activity in maize

Influence of Nitrogen and Salinity Levels on the Fruit Yield and Chemical Composition of Tomato in a Hydroponic Culture

Nitrate reductase activity and nitrogen compounds in xylem exudate of Juglans nigra seedlings: relation to nitrogen source and supply

Contact Info

Product

Resources

About