scholarly journals Foliar Application of Potassium Nitrate Affects the Growth and Nitrate Reductase Activity in Sunflower and Safflower Leaves under Salinity

2011 ◽  
Vol 39 (2) ◽  
pp. 172 ◽  
Author(s):  
Nusrat JABEEN ◽  
Rafiq AHMAD
Keyword(s):  
Nitrate Reductase ◽  
Leaf Area ◽  
Soluble Protein ◽  
Protein Concentration ◽  
Foliar Application ◽  
Saline Water ◽  
Tap Water ◽  
Reductase Activity ◽  
Dry Weight ◽  
Potassium Nitrate

Effect of foliar application of KNO3 on growth and the activity of nitrate reductase were studied in the leaves of sunflower (Helianthus annuus L.) and safflower (Carthamus tinctorius L.) plants growing under different levels of salinity. The seeds were sown in pots under non saline condition and saline water irrigation was started at three leaf stage after germination. Different concentration of saline water (i.e. 0.3% and 0.6%, equivalent to an EC of 4.8 and 8.6 dS/m respectively) were made by dissolving sea salt per litre of tap water. Nutrient solution of KNO3 was sprayed at the rate of 250 ppm. The concentration of Na+ and Cl- rapidly increased in the leaves of both the plants under salinity stress. In contrast the nitrate (NO3-) and soluble protein concentration were decreased with the increasing salinity. Salinity reduced leaf area, its fresh and dry weight per plant and also inhibited the activity of Nitrate reductase (NRA) enzyme. The application of KNO3 significantly reduced the increasing tendency of Na+ and Cl- and increased leaf area, its fresh and dry weight per plant, NO3- and soluble protein concentration and NR activity in leaves irrespective to the growth of plant under non saline or saline conditions.

scholarly journals THE EFFECT OF PURIFIED AMOUNT OF TRITERPENE GLYCOSIDES AND THEIR ENRICHED EXTRACT FROM LEAVES OF SILPHIUM PERFOLIATUM L. ON THE GROWTH AND ACTIVITY OF NITRATE REDUCTASE OF WIN-TER WHEAT PLANTS

2019 ◽  
pp. 441-448 ◽  
Author(s):  
Eleonora Sergeyevna Davidyants
Keyword(s):  
Nitrate Reductase ◽  
Winter Wheat ◽  
Seed Treatment ◽  
Nitrate Reductase Activity ◽  
Growth Parameters ◽  
Reductase Activity ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Triterpene Glycosides ◽  
Nr Activity

The effect of seed treatment with solutions of a purified amount of triterpene glycosides (PATG) containing, as major components, oleanolic acid glycosides – sylphiosides B, C, E, G, and extract (E) enriched with sylphiosides, from Silphium perfoliatum L. (Asteraceae) leaves on growth parameters and nitrate reductase activity (NR, EC 1.6.6.1) of 7-day winter wheat plants (Tritium aestivum L.) was studied. It was shown that, seed treatment with PATG solutions in concentrations of 0.0005 and 0.001% and E in concentrations of 0.2 and 0.4% caused an increase in the length of roots, shoots, wet and dry weight of seedlings compared to the control. The stimulating effect of these concentrations of PATG and E on the total nitrate reductase activity of the roots and leaves of seedlings has been established, and an increase in the stimulating effect of preparations on the activity NR оf against the background of substrate activation of the enzyme potassium nitrate (KNO3) was observed. The greatest increase in the total NR activity of roots and leaves of winter wheat plants was observed when PATG acted at a concentration of 0.001% and E – at a concentration of 0.4%, which amounted respectively 122 and 116%, when adding 1 ml of 50 mM KNO3 solution into the growing medium of plants – 141 and 137% relative to the control. The stimulating effect of exogenous triterpene glycosides on NR activity has been established for the first time. The obtained data allow to theoretically substantiate the possibility of practical use of triterpene glycosides and preparations based on them for the regulation of growth and nitrogen metabolism of plants.

scholarly journals Effect of Pgrs and Nutrients on Growth, Nitrate Reductase Activity, Soluble Protein, Proline Content and Yield in Bhendi Hybrid Under Salinity

2017 ◽  
Vol 5 (1) ◽  
pp. 81-87
Author(s):  
Vishnuveni Murugan ◽  
Sivakumar Rathinavelu ◽  
Nandhitha Krishnadevaraj ◽  
Chandrasekaran Perumal
Keyword(s):  
Salicylic Acid ◽  
Nitrate Reductase ◽  
Plant Growth ◽  
Soluble Protein ◽  
Nitrate Reductase Activity ◽  
Foliar Application ◽  
Reductase Activity ◽  
Foliar Spray ◽  
Proline Content ◽  
Saline Condition

An experiment was conducted to study the effect of PGRs { gibberellic acid (10 ppm), brassinolide (0.5 ppm), salicylic acid (100 ppm), ascorbic acid (100 ppm), benzyl amino purine (5 ppm)} and nutrients { K2SO4 (0.5%) + FeSO4 (0.5%) + Borax (0.3%) mixture and 19:19:19 (1%) mixture} on growth, NR enzyme activity, proline, soluble protein content and yield of bhendi hybrid (COBh H 1) under saline condition. The treatments were given at 25 and 45 DAS as foliar spray. The results showed that, nitrate reductase activity, soluble protein and plant growth were reduced under saline condition where as proline content was increased compared to absolute control. Foliar application of PGRs and nutrients enhanced the NR activity, proline, soluble protein and plant growth under saline condition. Among the PGRs and nutrients, foliar application of salicylic acid (100 ppm) and brassinolide (0.5 ppm) showed the better performance to mitigate the effect of salinity.

scholarly journals THE INFLUENCE OF SPRAYING WITH POTASSIUM SILICATE AND IRRIGATION WITH SALINE WATER IN SANDY SOIL ON Calendula officinalis L.

2019 ◽  
pp. 39-56
Keyword(s):  
Agricultural Research ◽  
Saline Water ◽  
Tap Water ◽  
Block Design ◽  
Foliar Spray ◽  
Dry Weight ◽  
Potassium Silicate ◽  
Research Station ◽  
Calendula Officinalis ◽  
Calendula Officinalis L

Two pots experiments were conducted at the Experimental Farm of El-Qassasin Horticultural Research Station, Agricultural Research Center, Ismailia Governorate, Egypt, during two successive seasons of 2016/2017 – 2017/2018, to investigate the effect of potassium silicate at (0, 4, 6, and 8 cm3/l) as a foliar spray under different levels of water salinity (tap water, 1000, 2000 and 3000 ppm) on Calendula officinalis L. plant. The experiment was performed in complete randomized block design as factorial experiment with 3 replicates. The obtained results cleared that using salinity levels decreased growth parameters (plant height, number of branches/plant, fresh and dry weights of herb/plant), flowering parameters (flower diameter, number of flowers/plant, fresh and dry weight of flowers (g/plant) during eight cuts and fresh and dry weight of flowers (g/plant/season)) and chemical constituents (chlorophyll a, chlorophyll b, carbohydrate and carotenoid contents) compared to control. Moreover, the highest values in these parameters were registered by potassium silicate at 8 cm3/l concentration. Proline content increased in leaves with using saline water at 3000 ppm + potassium silicate at 8 cm3/l. Generally, it could be concluded that potassium silicate at 8 cm3/l, showed a uniform impact in alleviating inhibition of Calendula officinallis L. plant growth and productivity under moderate salinity stress condition.

scholarly journals Effect of Foliar Application of Growth Regulators on Vegetative and Physiological Growth Parameters in Ajowan (Trachyspermum ammi L. Sprague)

2020 ◽  
pp. 100-109
Author(s):  
Y. Rajasekhara Reddy ◽  
G. Ramanandam ◽  
P. Subbaramamma ◽  
A. V. D. Dorajeerao
Keyword(s):  
Leaf Area ◽  
Foliar Application ◽  
Growth Parameters ◽  
Block Design ◽  
Foliar Spray ◽  
Dry Weight ◽  
Area Index ◽  
Chlorophyll Contents ◽  
Trachyspermum Ammi ◽  
Number Of Leaves

A field experiment was carried out during rabi season of 2018-2019, at college farm, College of Horticulture, Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari District, Andhra Pradesh. The experiment was laidout in a Randomised Block Design with eleven treatments (viz., T1- NAA @ 50 ppm, T2-NAA @ 100 ppm, T3-GA3 @ 50 ppm,  T4-GA3 @ 100 ppm, T5-Thiourea @ 250 ppm, T6-Thiourea @ 500 ppm, T7-28-Homobrassinolide @ 0.1 ppm, T8-28-Homobrassinolide @ 0.2 ppm, T9-Triacontinol @ 2.5 ppm, T10-Triacontinol @ 5 ppm, T11-(Control) Water spray) and three replications. The treatments were imposed at 30 and 45 DAT in the form of foliar spray. Foliar application of GA3@ 100 ppm (T4) had recorded the maximum plant height (108.20 cm), leaf area (9.53 cm2) and leaf area index (0.74). Foliar application of thiourea @ 250 ppm (T5) had recorded the maximum values with respect to number of primary branches (15.03 plant-1), number of secondary branches (83.40 plant-1), plant spread (1793 cm2 plant-1), fresh weight (376.29 g plant-1), dry weight (103.54 g plant-1) and number of leaves plant-1((298.8). The same treatment (T5) had recorded the highest values with respect to crop growth rate (1.44 gm-2d-1), chlorophyll-a (1.40 mg g-1), chlorophyll-b (0.076 mg g-1) and total chlorophyll contents (1.48 mg g-1) in the leaves.

scholarly journals Response of Jatropha integerrima Plants Irrigated with Different Levels of Saline Water to Nano Silicon and Gypsum

2017 ◽  
Vol 5 (4) ◽  
pp. 136 ◽  
Author(s):  
Ashour, H. A. ◽  
Abdel Wahab M. Mahmoud
Keyword(s):  
Irrigation Water ◽  
Foliar Application ◽  
Saline Water ◽  
Tap Water ◽  
Chemical Constituents ◽  
Harmful Effect ◽  
Total Phenolic ◽  
Soil Application ◽  
Nano Silicon ◽  
Different Levels

An open field experiment was carried out during 2015 and 2016 seasons at the experimental nursery of the Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Egypt. The purpose of present research was to investigate the effect of foliar application of nano silicon with different concentrations and gypsum soil application on growth, flowering and chemical constituents of Jatropha integerrima plants irrigated with different levels of saline water. The concentrations of saline water were (1000, 2000 and 4000 ppm), in addition to tap water (270 ppm) as a control, simultaneously plants were received monthly foliar application of nano silicon 1 and 2 mM or soil application of gypsum at 20 g/plant, either applied individually or in combination.The results showed that, elevating salt concentration in irrigation water decreased vegetative growth characteristics, flowering traits, leaves anatomy and chemical constituents. In contrast, increasing salinity of irrigation water boosted contents of proline, Ca%, Na%, Cl%, total phenolic and flavonoids. On the other hand, foliar application of nano silicon and soil addition of gypsum treatments either individually or in combination had favorable effects on enhancing vegetative parameters and chemical constitutes, meanwhile decreasing accumulation of Na%, Cl%, total phenolic and flavonoids in leaves. It can be concluded that, foliar spray of nano silicon combined with soil addition of gypsum was the best effective and economic treatment recommended for mitigating the harmful effect of salinity stress on Jatropha plants irrigated with saline water at concentration up to 4000 ppm.

INFLUENCE DE LA TEMPERATURE DU SUBSTRAT ET DE LA FERTILISATION AZOTEE SUR LA CROISSANCE, LE DEVELOPPEMENT, LA TENEUR EN AZOTE ET L’ACTIVITE DE LA NITRATE REDUCTASE CHEZ LA TOMATE

1984 ◽  
Vol 64 (1) ◽  
pp. 181-191 ◽  
Author(s):  
ANDRÉ GOSSELIN ◽  
FRANÇOIS-P. CHALIFOUR ◽  
MARC J. TRUDEL ◽  
GHISLAIN GENDRON
Keyword(s):  
Lycopersicon Esculentum ◽  
Nitrate Reductase ◽  
Nitrogen Content ◽  
Nitrate Reductase Activity ◽  
Root Zone ◽  
Reductase Activity ◽  
Dry Weight ◽  
Fruit Weight ◽  
Root Zone Temperature ◽  
Lycopersicon Esculentum Mill

We measured the effects of five root temperatures (12, 18, 24, 30 and 36 °C) and five rates of nitrogen fertilization (0, 2.5, 7.5, 22.5 and 67.5 meq N∙L−1) on growth, development, nitrogen content and nitrate reductase activity of tomato plants (Lycopersicon esculentum Mill. ’Vendor’). The greatest root dry weight was obtained at 18 °C and 2.5 meq N∙L−1 and the highest shoot dry weight at 24 °C and 22.5 meq N∙L−1. Total fruit weight was maximum at 24 °C and 2.5 meq N∙L−1. High root temperatures and high levels of fertilization increased the number of aborted flowers and the nitrogen content of shoots, but reduced tomato yields. Nitrate reductase activity (NRA) was higher in leaves than in roots and with plants receiving 22.5 meq N∙L−1 as compared to 2.5 meq. NRA in roots decreased as temperature increased.Key words: Lycopersicon esculentum Mill., root zone temperature, nitrate reductase, nitrogen

scholarly journals Effects of Aquatic Extract from Chrysanthemum's Rhizospheric Soil on the Seed Germination and Root Enzymes

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 789E-789
Author(s):  
Kai Zhou ◽  
Weiming Guo ◽  
Zhongchun Jiang*
Keyword(s):  
Seed Germination ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Water Extract ◽  
Dry Weight ◽  
Rhizospheric Soil ◽  
Malondialdehyde Content

The autointoxication of chrysanthemum was studied using water extract of Dendranthema morifolium's rhizospheric soil. Results of bioassays showed that the water extract inhibited chrysanthemum seed germination and the activities of some important root enzymes. The seedling nitrate reductase activity was decreased linearly with increasing concentration of the extract. The activity of root dehydrogenase was inhibited only at the highest concentration tested [3.2 g·mL-1, dry weight (DW)], but was stimulated at a lower concentration tested (1.6 g·mL-1, DW). Malondialdehyde content increased at higher than 1.6 g·mL-1, DW concentrations of the extract. The autointoxication phenomenon might be related to the difficulties in continuous plantings of chrysanthemum at the same location.

scholarly journals Physiological response of a golden tide alga (<i>Sargassum muticum</i>) to the interaction of ocean acidification and phosphorus enrichment

2017 ◽  
Vol 14 (3) ◽  
pp. 671-681 ◽  
Author(s):  
Zhiguang Xu ◽  
Guang Gao ◽  
Juntian Xu ◽  
Hongyan Wu
Keyword(s):  
Nitrate Reductase ◽  
Ocean Acidification ◽  
Soluble Protein ◽  
Nitrate Reductase Activity ◽  
Nitrate Uptake ◽  
Dark Respiration ◽  
Reductase Activity ◽  
Soluble Carbohydrates ◽  
Promoting Effect ◽  
Nitrate Uptake Rate

Abstract. The development of golden tides is potentially influenced by global change factors, such as ocean acidification and eutrophication, but related studies are very scarce. In this study, we cultured a golden tide alga, Sargasssum muticum, at two levels of pCO2 (400 and 1000 µatm) and phosphate (0.5 and 40 µM) to investigate the interactive effects of elevated pCO2 and phosphate on the physiological properties of the thalli. Higher pCO2 and phosphate (P) levels alone increased the relative growth rate by 41 and 48 %, the net photosynthetic rate by 46 and 55 %, and the soluble carbohydrates by 33 and 62 %, respectively, while the combination of these two levels did not promote growth or soluble carbohydrates further. The higher levels of pCO2 and P alone also enhanced the nitrate uptake rate by 68 and 36 %, the nitrate reductase activity (NRA) by 89 and 39 %, and the soluble protein by 19 and 15 %, respectively. The nitrate uptake rate and soluble protein was further enhanced, although the nitrate reductase activity was reduced when the higher levels of pCO2 and P worked together. The higher pCO2 and higher P levels alone did not affect the dark respiration rate of the thalli, but together they increased it by 32 % compared to the condition of lower pCO2 and lower P. The neutral effect of the higher levels of pCO2 and higher P on growth and soluble carbohydrates, combined with the promoting effect on soluble protein and dark respiration, suggests that more energy was drawn from carbon assimilation to nitrogen assimilation under conditions of higher pCO2 and higher P; this is most likely to act against the higher pCO2 that caused acid–base perturbation via synthesizing H+ transport-related protein. Our results indicate that ocean acidification and eutrophication may not boost golden tide events synergistically, although each one has a promoting effect.

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