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

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.

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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

Canadian Journal of Plant Science ◽

10.4141/cjps84-023 ◽

1984 ◽

Vol 64 (1) ◽

pp. 181-191 ◽

Cited By ~ 7

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

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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

chemistry of plant raw material ◽

10.14258/jcprm.2019045482 ◽

2019 ◽

pp. 441-448 ◽

Cited By ~ 1

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.

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Effect of Lead on Seed Germination, Seedling Growth, Chlorophyll Content and Nitrate Reductase Activity in Mung Bean (Vigna radiata)

Research Journal of Phytochemistry ◽

10.3923/rjphyto.2008.61.68 ◽

2008 ◽

Vol 2 (2) ◽

pp. 61-68 ◽

Cited By ~ 11

Author(s):

Rakesh Singh Sengar ◽

Madhu Gautam ◽

Sanjay Kumar Garg ◽

Reshu Chaudhary ◽

Kalpana Sengar

Keyword(s):

Seed Germination ◽

Nitrate Reductase ◽

Chlorophyll Content ◽

Seedling Growth ◽

Vigna Radiata ◽

Mung Bean ◽

Nitrate Reductase Activity ◽

Reductase Activity

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Nitrogen assimilation and nitrate reductase activity in tomato seedlings. II. Effect of increasing calcium doses in the presence of high magnesium concentrations on nitrate reduction and protein content

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1977.020 ◽

2015 ◽

Vol 46 (2) ◽

pp. 275-283

Author(s):

A. Suder-Moraw ◽

J. Buczek

Keyword(s):

Nitrate Reductase ◽

Protein Content ◽

Nutrient Solution ◽

Nitrate Reductase Activity ◽

Calcium Concentration ◽

Nitrogen Assimilation ◽

Reductase Activity ◽

Dry Weight ◽

Tomato Seedlings ◽

Excessive Accumulation

A 3:30 Ca:Mg ratio in the nutrient solution produces in tomato seedlings symptoms of Ca2+ deficit owing to excessive accumulation of Mg2+ ions and the depressed Ca2+ accumulation. As a result of this a decrease in dry weight increment and protein content is observed together with inhibition of nitrate reductase activity. A doubled Ca2+ dose in the nutrient solution, that is a change in the Ca:Mg ratio to 6:30 abolishes the external symptoms of Ca2+ deficit and reduces Mg2+ accumulation, that of Ca2+ ions remaining unchanged. At the same time an enhanced activity of nitrate reductase appears, reaching values close to those in control plants. Tomato seedlings grown on a 3-fold increased Ca2+ dose (Ca:Mg = 9:30) did not differ at all from the control ones. An in-crease in calcium concentration in the nutrient solution, the high magnesium dose remaining unchanged, causes enhanced K+ accumulation, and this may affect nitrate absorption and reduction. It would seem that Ca2+ deficit in plant tissues induced by excessive Mg2+ accumulation with unsuitable Ca:Mg ratio in the nutrient solution in cause of disorders in NO3 nitrogen assimilation.

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

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.2005.016 ◽

2011 ◽

Vol 74 (2) ◽

pp. 119-123 ◽

Cited By ~ 3

Author(s):

Elżbieta Sacała ◽

Agnieszka Biegun ◽

Anna Demczuk ◽

Edward Grzyś

Keyword(s):

Nitrate Reductase ◽

Nutrient Solution ◽

Nitrate Reductase Activity ◽

Growth Parameters ◽

Reductase Activity ◽

Dry Weight ◽

Growth Responses ◽

Positive Effects ◽

Maize Varieties

In this study, investigated were the effects of NaCl (60 mmol/dm-3) and NaCl supplemented with different salts (5 mmol/dm-3 CaCl2, CaSO4, CaCO3, 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 Ca2+ or K+ to nutrient solution containing NaCl did not definitely improve the growth parameters of maize. However, among the tested salts, CaCl2 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 CaCl2 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 CaCl2 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.

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