scholarly journals Allelopathic Effects of Alfalfa Plant Residues on Emergence and Growth of Cucumber Seedlings

HortScience ◽  
1991 ◽  
Vol 26 (4) ◽  
pp. 368-370 ◽  
Author(s):  
James E. Ells ◽  
Ann E. McSay
Keyword(s):  
Particle Size ◽  
Seed Germination ◽  
Cucumis Sativus ◽  
Dry Weight ◽  
Plant Residues ◽  
Alfalfa Plant ◽  
Cucumber Seedlings ◽  
Growing Medium ◽  
Intermediate Size ◽  
Allelopathic Effects

Growth chamber tests demonstrated that alfalfa (Medicago sativa L.) residue is toxic to cucumber (Cucumis sativus L.) seed germination and seedling growth. Ground alfalfa roots at 0.5% (w/w, dry weight) inhibited germination when added to the growing medium. Alfalfa roots at 0.5% were also toxic to pregerminated cucumber seed. However, cucumber seedlings grew normally if this same medium was watered and incubated for >1 day before planting. Alfalfa particle size in media influenced cucumber performance, with the intermediate size (1 to 2 mm) being lethal to cucumbers.

scholarly journals Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings

2011 ◽  
Vol 77 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Elżbieta Sacała ◽  
Edward Grzyś ◽  
Anna Demczuk ◽  
Zofia Spiak
Keyword(s):  
Salt Stress ◽  
Osmotic Stress ◽  
Cucumis Sativus ◽  
Nitrate Concentration ◽  
Dry Weight ◽  
Stress Factors ◽  
Fresh Mass ◽  
Nitrate Content ◽  
Cucumber Seedlings ◽  
Nr Activity

Plants exposed to osmotic stress exhibit changes in their physiology and metabolism. In general, osmotic stress reduces water availability and causes nutritional imbalance in plants. In the present study, we compared the response of cucumber (<em>Cucumis sativus</em> L. var. Władko F-1) to ionic (100 mmol•dm-3 NaCl) and osmotic stress (10% PEG 6000). Both stress factors reduced significantly fresh and dry weight of 7-day-old cucumber seedlings. Under PEG treatment reduction of cucumber dry mass was lesser than in fresh mass, whereas under salt stress decrease in dry weight of cucumber shoots was more pronounced than in fresh mass. Salt stress caused severe decrease in nitrate concentration and activity of nitrate reductase (NR). In cotyledons nitrate content declined to 17% of the control and similar reduction in NR activity was observed. In the roots, observed changes were not so drastic but there was also strong interaction between reduction in nitrate content and NR activity. Under 10% PEG both nitrate concentration and NR activity in cucumber roots were significantly higher in comparison to control plants. In cotyledons NR activity was significantly lower than in control plants, while decrease in nitrate content was not statistically significant. Phosphate concentration did not change significantly in cucumber cotyledons but increased in roots treated both NaCl (32% increase) and PEG (53% increase). Similar tendencies were observed in acid phosphatase activity. Obtained results indicated that osmotic and salt stresses evoke differential responses, particularly in growth reduction and nitrogen metabolism in cucumber seedlings.

Effect of Naptalam on Chloramben Toxicity, Uptake, Translocation, and Metabolism in Cucumber (Cucumis sativus)

Weed Science ◽  
1991 ◽  
Vol 39 (1) ◽  
pp. 27-32
Author(s):  
Larry D. Knerr ◽  
Herbert J. Hopen ◽  
Nelson E. Balke
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Shoot Growth ◽  
Petri Dish ◽  
Dry Weight ◽  
Laboratory Studies ◽  
Cucumber Seedlings ◽  
Plant Parts ◽  
Cucumber Roots ◽  
Hydroponically Grown

Laboratory studies demonstrated that naptalam safens cucumber against the phytotoxic effects of chloramben. In petri dish studies, cucumber seedlings grown from seeds exposed to chloramben plus naptalam had greater shoot growth, root growth, and dry weight than seedlings grown from seeds exposed to chloramben alone. Naptalam also partially reversed the reduction in dry weight of various plant parts caused by exposure of roots of hydroponically grown seedlings to chloramben. More radioactivity from root-applied14C-chloramben remained in cucumber roots and less was translocated to shoots with a14C-chloramben plus naptalam treatment than with a14C-chloramben alone treatment. Naptalam appeared to influence chloramben metabolism. In various plant parts, concentrations of chloramben and its metabolites differed between the two treatments.

scholarly journals Effects of salinity and external proline on seed germination and early growth of Cucumis sativus cv. super ps

2018 ◽  
Vol 10 (4) ◽  
pp. 215-220
Author(s):  
FARIBA AMINI ◽  
MEHRY ASKARY ◽  
FAHIMEH MOHTASHAMI ◽  
FAHIMEH MOHTASHAMI
Keyword(s):  
Seed Germination ◽  
Cucumis Sativus ◽  
Root Length ◽  
Significant Variation ◽  
Defense Mechanisms ◽  
Germination Rate ◽  
Dry Weight ◽  
Early Growth ◽  
Soluble Carbohydrate ◽  
Fresh Weight

Amini F, Askary M, Mohtashami F. 2018. Effects of salinity and external proline on seed germination and early growth of Cucumis sativus cv. super ps. Nusantara Bioscience 10: 215-220. Salinity is one of the important abiotic stresses that has an adverse effect on plant productions. High salt concentrations had negative effects on plant processes such as seed germination, seedling growth and turgescent, vegetative growth, flowering and fruiting stages. Proline as a compatible solution plays an important role in defense mechanisms of cellular stress. This study was done to evaluate effects of proline pretreatment (0 and 20 mM) in terms of salinity (0, 50, 100 and 150 mM) on cucumber cv. super ps. The obtained results proved that salinity treatments had significant effects on seed germination rate. On the contrary, application of proline had no significant effect on germination percentages of control and salt-stressed seeds. The root fresh weight and length of plant reduced with salinity increment while proline treatment had positive significant effects on the root dry as well as the fresh weight. Although, no significant variation was found in the root length and dry weight of cultivars treated with proline under salinity stresses. Meanwhile, the shoot length and dry weight of plants declined after salt-stressed treatments. While this condition increased the fresh weight of shoot. Proline treatments increased all of observed parameters but there were no significant variation found in the root length or dry weight of plants treated under saline stresses. The total soluble carbohydrate of plants had positive significant correlation with salt concentration, but the application of proline declined carbohydrate amounts in both salt-stressed and non-stressed plant. Salinity stress increased sodium, proline, protein contents and CAT enzyme, GPOX as well as MDA concentrations, while in the proline-treated plants salinity stresses had no significant effect on CAT, GPOX, MDA concentrations and internal proline amount.

The effect of hydrophilic gel from the second layer of Tingui (Magonia pubescens St. Hil.) seeds on germination and early development of cucumber (Cucumis sativus L.)

2012 ◽  
Vol 34 (82) ◽  
Author(s):  
Matheus Couto Alves ◽  
Antonio Zenon Antunes Teixeira
Keyword(s):  
Seed Germination ◽  
Cucumis Sativus ◽  
Early Development ◽  
Tap Water ◽  
Growth Period ◽  
Cucumis Sativus L ◽  
Scheffe Test ◽  
Seed Growth ◽  
Allelopathic Effects ◽  
Hydrophilic Gel

Some plant species from Cerrado were considered to have allelopathic effects. Allelopathy means the chemical competitionbetween plants wich can benefit or harm another plant. The objective of this study was to determine the effect ofhydrophilic gel from the second layer of Magonia pubescens St. Hil. seeds (a high plant, known as Tingui, that grows inthe areas of Cerrado) on germination and early development of cucumber (Cucumis sativus L.). The cucumber seeds weretreated with a mixture of sand and powder of Tingui in different proportions of 25%, 50%, 75% and 100%. The sand waspreviously washed with tap water, then with distilled water and, after that, it was dried in an oven at 100 ºC for 5 hours.The seeds were planted in 50 ml polystyerenes cups and moistened with water daily. To check possible changes from theprocess, a batch of seed were tested under the same conditions without the Tingui powder (only with sand). The parametersof this study were to measure the seed germination and plant development. The growth period was seven days, under± 30 ºC, and 12 hours photoperiod. The overall data were analyzed using ANOVA and Scheffe test, at 5% significancelevel. From the results, we concluded that there were no differences in the percentage of seed germination for all treatments,except the treatment of 100%. As for the germination average time and the seed growth, there were no significantdifferences between the treatment of 25% and the control, but the effects were more effective at higher concentrations.

scholarly journals Response of Cucumis sativus L. seedlings to Pb exposure

2009 ◽  
Vol 21 (3) ◽  
pp. 175-186 ◽  
Author(s):  
Jamile F. Gonçalves ◽  
Alexssandro G. Becker ◽  
Luciane B. Pereira ◽  
João B. T. da Rocha ◽  
Denise Cargnelutti ◽  
...  
Keyword(s):  
Cucumis Sativus ◽  
Soluble Protein ◽  
Chlorophyll Concentration ◽  
Dry Weight ◽  
Total Soluble Protein ◽  
Cucumis Sativus L ◽  
Cucumber Seedlings ◽  
Pb Exposure ◽  
Pb Concentration

In this study, the effects of lead (Pb) on growth, photosynthetic pigments concentration, lipid peroxidation, electrolyte leakage percentage (ELP), protein oxidation, aminolevulinate dehydratase (ALA-D; E.C. 4.2.1.24), ascorbate peroxidase (APX; E.C. 1.11.1.11), catalase (CAT; E.C. 1.11.1.6) and superoxide dismutase (SOD; E.C. 1.15.1.1) activities, and ascorbic acid (AsA), non-protein thiol groups (NPSH) and total soluble protein concentrations in cucumber seedlings (Cucumis sativus L.) were investigated. Seedlings were grown in vitro in an agar-solidified substrate containing three Pb levels as (C2H3O2)Pb.3H2O (0, 100, 400, and 1000 µmol L-1) for 10 d. Increasing Pb concentrations in substrate enhanced Pb concentration in both roots and shoot. Pb accumulated at a higher amount in roots. Root length and total fresh weight were decreased at the two highest Pb concentrations. Cucumber showed no reduction in shoot length and total dry weight at any Pb level. The highest Pb concentration decreased water content and ALA-D activity as well as increased malondialdehyde, carbonyls and total soluble protein concentrations. Carotenoids concentration enhanced at 100 and 400 µmol Pb L-1, while chlorophyll concentration and ELP were not affected by Pb stress. Activity of APX was inhibited while the activities of CAT and SOD were increased at all Pb concentrations. AsA was enhanced at 400 and 1000 µmol Pb L-1 whereas NPSH were increased only at the highest Pb concentration. Therefore, high Pb-exposure caused oxidative stress, and the antioxidant system of the cucumber seedlings was not sufficient to revert it, contributing for growth reduction.

scholarly journals Application of Silica Nanoparticles Induces Seed Germination and Growth of Cucumber (Cucumis sativus)

2019 ◽  
Vol 28 (1) ◽  
pp. 57-68
Author(s):  
H. El-Ramady H. El-Ramady
Keyword(s):  
Seed Germination ◽  
Cucumis Sativus ◽  
Dry Weight ◽  
Nano Silica ◽  
Vigor Index ◽  
Germination Speed ◽  
Mean Germination Time ◽  
The Mean ◽  
Growth Development ◽  
Germination And Growth

Five rates of nano-silica (NS) suspensions (0, 100, 200, 300 and 400 mg L-1) were used to study their effects on seed germination and growth development of cucumber (Cucumis sativus). The rate of 200 mg L-1 significantly increased final germination%, germination speed, vigor index, and germination index by 28.7, 70.3, 46.7 and 68.8 %, respectively, compared to untreated seeds. However, it reduced the mean germination time by 31.7%. Similarly, 200 mg L-1 NS had the highest fresh and dry weight of germinant. However, all NS treatments enhanced the seed germination and growth development in comparison to control.

scholarly journals The effect of hydrophilic gel from the second layer of Tingui (Magonia pubescens St. Hil.) seeds on germination and early development of cucumber (Cucumis sativus L.)

2012 ◽  
Vol 34 (82) ◽  
Author(s):  
Matheus Couto Alves ◽  
Antonio Zenon Antunes Teixeira
Keyword(s):  
Seed Germination ◽  
Cucumis Sativus ◽  
Early Development ◽  
Tap Water ◽  
Growth Period ◽  
Cucumis Sativus L ◽  
Scheffe Test ◽  
Seed Growth ◽  
Allelopathic Effects ◽  
Hydrophilic Gel

Some plant species from Cerrado were considered to have allelopathic effects. Allelopathy means the chemical competitionbetween plants wich can benefit or harm another plant. The objective of this study was to determine the effect ofhydrophilic gel from the second layer of Magonia pubescens St. Hil. seeds (a high plant, known as Tingui, that grows inthe areas of Cerrado) on germination and early development of cucumber (Cucumis sativus L.). The cucumber seeds weretreated with a mixture of sand and powder of Tingui in different proportions of 25%, 50%, 75% and 100%. The sand waspreviously washed with tap water, then with distilled water and, after that, it was dried in an oven at 100 ºC for 5 hours.The seeds were planted in 50 ml polystyerenes cups and moistened with water daily. To check possible changes from theprocess, a batch of seed were tested under the same conditions without the Tingui powder (only with sand). The parametersof this study were to measure the seed germination and plant development. The growth period was seven days, under± 30 ºC, and 12 hours photoperiod. The overall data were analyzed using ANOVA and Scheffe test, at 5% significancelevel. From the results, we concluded that there were no differences in the percentage of seed germination for all treatments,except the treatment of 100%. As for the germination average time and the seed growth, there were no significantdifferences between the treatment of 25% and the control, but the effects were more effective at higher concentrations.

IMPACT OF FERTILIZERS APPLICATION ON SEED GERMINATION AND SEEDLING GROWTH OF VIGNA RADIATA

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
SUPRIYA DIXIT ◽  
R. K. GUPTA
Keyword(s):  
Seed Germination ◽  
Leaf Area ◽  
Seedling Growth ◽  
Vigna Radiata ◽  
Agricultural Research ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Research Field ◽  
Chemical Fertilizer ◽  
Seedling Length

Currently, a real challenge for the workers in the agricultural research field is to stop or reduce the use of expensive agrochemicals/ chemical fertilizers which are hazardous to the environment as well as human health. Present study was aimed to improve the growth and obtain optimum yield of Vigna crop with eco-friendly, non-toxic way and to reduce the use of agrochemical/chemical fertilizer application in agricultural activities. A pot experiment was conducted to study the effect of chemical fertilizer (DAP) and biofertilizer ( Rhizobium strain) separately and in combination on seed germination and seedling growth (at 30 days) based on morphological parameters such as seedling length (cm), fresh weight (g), dry weight (g) and leaf area (cm)2 of Vigna radiata (L.) Wilczek. After one month (30 Days) observations, it was found that seedling length, fresh and dry weights and leaf area were maximum in T4 and minimum in T15, T7 and T8 favored improved seedling length and leaf area whereas T7, T8, and T9 favored improved fresh and dry weights as compared to control.

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