Sodium Alginate Stimulates Growth and Metabolism in Shoots of Corchorus olitorius, Vicia faba, and Zea mays Through the Vegetative Stages
Rasha M.E. GamelN. ElsayedSamia A. HarounAli HegazyReda KhalilHeba S. El-DesoukyReda M. Y. ZewailMahmoud HelalRokayya SamiSuzan HararaAlaa F. AlBakry
0
Citation
0
Reference
10
Related Paper
Abstract:
In recent studies, sodium alginate (SA) has mainly been a plant growth promoter for many plants and crops as a novel bio stimulating materials for increasing plant growth under various conditions. Pot testing was done to examine the impacts of various levels of SA (25, 50 and 100 ppm) on the growth and physiological activities of Corchorus olitorius (molokhya), Vicia faba (faba bean) and Zea mays (corn) plants in two vegetative stages after 10 and 40 days from sowing. Treatment with different SA concentrations improved significantly the physiological characters of the used plants. The data indicated that the used SA concentrations increased photosynthetic pigments, carbohydrate contents, nitrogen contents, antioxidant enzymes and overall protein significantly as compared to control values.Keywords:
Corchorus olitorius
Vegetative reproduction
Biological pigment
Photosynthetic pigment
In recent studies, sodium alginate (SA) has mainly been a plant growth promoter for many plants and crops as a novel bio stimulating materials for increasing plant growth under various conditions. Pot testing was done to examine the impacts of various levels of SA (25, 50 and 100 ppm) on the growth and physiological activities of Corchorus olitorius (molokhya), Vicia faba (faba bean) and Zea mays (corn) plants in two vegetative stages after 10 and 40 days from sowing. Treatment with different SA concentrations improved significantly the physiological characters of the used plants. The data indicated that the used SA concentrations increased photosynthetic pigments, carbohydrate contents, nitrogen contents, antioxidant enzymes and overall protein significantly as compared to control values.
Corchorus olitorius
Vegetative reproduction
Biological pigment
Photosynthetic pigment
Cite
Citations (0)
Growth, development and plants productivity are usually affected by photosynthetic pigments activity. Magnetic fields are known to induce biochemical changes and could be used as a stimulator for growth related reactions including affecting photosynthetic pigments. The impact of magnetic field strengths on chlorophyll and carotenoids were investigated in this study through the use of date palm ( Phoenix dactylifera L.) seedlings. To study the effects of magnetic treatments on photosynthetic pigments, date palm seedlings were exposed to magnetic fields in two experiments. In the first experiment, seedlings were treated with static magnetic field at three levels of (10, 50 and 100 mT) and different durations (30, 60, 180, 240 and 360 min). At the second experiment, seedlings were treated with alternating magnetic field at 1.5 T for different durations (1, 5, 10 and 15 min). The photosynthetic pigments (chlorophyll a, chlorophyll b, carotenoids and total pigments) were assayed using spectrophotometric methods. Results indicated that pigments content (chlorophyll a, chlorophyll b, carotenoids and total pigments) was significantly increased under static magnetic field. The highest measurements were recorded at 100 mT, after 360 min of exposure. On the other hand, alternating magnetic field has decreased photosynthetic pigments content after 10 min of treatment with 1.5 T. Low magnetic field doses had a simulative effect on photosynthetic pigments whereas high doses had a negative effect. Chlorophyll a and carotenoids were more affected than chlorophyll b. Magnetic fields treatment could be used to enhance plant growth and productivity.
Phoenix dactylifera
Photosynthetic pigment
Biological pigment
Chlorophyll b
Cite
Citations (55)
Two field experiments were carried out at the farm of El-Gemmeiza Agric.Res. Station, Agric.Res. Center, during the two successive growing seasons; 1998/99 and 1999/2000 to study the effect of Zn, Mn and Fe on plant growth, photosynthetic pigments and some micronutrients content of faba bean leaves at 70 days age. Zn, Mn and Fe were added by seed coating method at a rate of 0.3gm of Zn or Fe and 0.15 gm of Mn in chelating form per one kilogram seed, individually or in all possible combination. Yet, the relations between the content of photosynthetic pigments and micronutrients in leaves were considered. The mean results of the two growing seasons showed that plant height, number of both leaves and branches as well as dry matter of various organs seemed to be improved by the different treatments. Moreover, photosynthetic pigments and micronutrients content in leaves were also significantly increased as a result of micronutrients application. In this respect, addition of Zn,Mn and Fe simultaneously induced the highest values for all aforementioned parameters followed by the dual combinations, whereas the individual treatments recorded the least increments compared with the control treatment. On the other hand, photosynthetic pigments in faba bean leaves were positively correlated by micronutrients content at different treatments of micronutrients as the following descending order: Mn< Zn < Fe. The aforesaid relations can be expressed as the following multiple equations: Y1 = 3.37 + 38.18X1** + 28.42X2** + 1.63X3** (r2 = 0.999) Y2 = 1.61 + 3.82X1** + 17.35X2 + 1.21X3* (r2 = 0.989) Where; Y1, Y2, X1, X2 and X3 indicate the mean values of Chl.(a+b), carotene, Zn,Mn and Fe content in leaves, respectively in (mg/plant). * significant at 0.05 level ** significant at 0.01 level
Biological pigment
Photosynthetic pigment
Cite
Citations (2)
While seed or foliar application of thiourea (TU) has the potential to modulate plant growth, studies reporting such bioregulatory role(s) of root-applied TU are limited. Here we report the growth regulation by root-applied TU in nine maize (Zea mays L.) varieties grown using sand culture. Thirty day old plants were treated with 0‒1.25 mM TU levels dissolved in nutrient solution, and the data recorded 20 days later. The parameters studied were symptoms of TU toxicity, growth and photosynthetic pigment contents. Results revealed that 0.25 mM TU promoted the growth of all varieties; 0.50 mM did so in some, while 0.75‒1.25 mM TU was inhibitory to all varieties. Higher TU levels (1.00‒1.25 mM) produced more intensive toxicity symptoms such as yellowing of leaves, and browning and constriction of roots but with significant varietal differences; Pak-Afgoi showed the lowest while EV-20 had the highest incidence of symptoms. Lowest TU level (0.25 mM) increased the photosynthetic pigments in all the varieties, while higher levels (1.00‒1.25) reduced chlorophyll (Chl) b and carotenoids (Car) contents and increased Chl:Car ratio more legibly in the sensitive varieties. There were no correlations of toxicity symptoms with growth and leaf pigments contents at 0.25 mM TU but these correlations were negative for shoot weight, number and area of leaves and Chl b, Car and Chl:Car ratio of leaves at 1.25 mM (toxic) level of TU. Likewise, root dry weight of maize varieties was negatively correlated with root constriction and root browning. Results suggest that higher levels of TU had pronounced influence on the root functions leading to reduced dry weight. From the current results we believe that TU has a definitive growth bioregulatory activity as it improved photosynthetic pigments contents at lower level (0.25 mM) but deteriorated them at higher levels (0.75‒1.25 mM). Substantial varietal differences suggested that TU effects are genetically-related in maize. Possible physiological basis of the current observations are discussed.
Photosynthetic pigment
Dry weight
Biological pigment
Cite
Citations (13)
Photosynthetic pigment
Biological pigment
Cold stress
Environmental stress
Cite
Citations (2)
Hydroxylamine
Plant Physiology
Biological pigment
Hydrazine (antidepressant)
Photosynthetic pigment
Rice plant
Cite
Citations (0)
Concurrent studies reported earlier described the drought susceptibility of two cultivars of Corchorus olitorius during the vegetative stage. The present greenhouse study was a further investigation conducted to evaluate the effects of soil water potential of -6 bar imposed at different physiological stages (the mid-vegetative, flowering, pod formation and pod filling) using the cultivar 'Oniyaya' as the test crop. The objective was to determine the most critical period with regards to susceptibility to water stress in terms of vegetative and reproductive yields and yield components. Leaf area was reduced by moisture stress at all stages of growth. Branch number, stem, lamina, petiole and whole plant fresh and dry weights and seed dry weight were significantly reduced by stress at the three reproductive stages. Pod number was greatly lowered when stress was imposed at flowering and pod formation stages, while pod lengths were significantly reduced by stressing at pod formation stage. The flowering stage appeared to be most critical.
Corchorus olitorius
Vegetative reproduction
Petiole (insect anatomy)
Moisture stress
Main stem
Dry weight
Water Stress
Cite
Citations (6)
The hereby study investigated the effect of Magnesium application at different levels on the morphological parameters and photosynthetic pigment accumulation of Corchorus olitorius. Seeds of C. olitorius were utilized in the experiment. These seeds were sown in 2 big bowls and were supplied with 200 ml of water every day until they were fully established. After three weeks of sowing, the seedlings were transplanted into plastic pots. The treatments were: distilled water (control); nutrient solution in which the concentration of Magnesium was increased by the factor of 5 (N5), nutrient solution in which the concentration of Magnesium was increased by the factor of 10 (N10) and nutrient solution lacking Magnesium source (NMg). The seedlings were then divided into 4 regimes, with each regime containing each treatment. From the results obtained, it was observed that there was a significant effect at (P≥0.05) on the Corchorus olitorius growth parameters and photosynthetic pigment accumulation among the treatments. There was an increase in the shoot height, number of leaves, number of flowers, leaf area and the photosynthetic pigment accumulation in the seedlings treated with magnesium increased by the factor of 5 (N5) than by other treatments. The control recorded the lowest values for these parameters. It can be concluded that for an optimum growth of Corchorus olitorius, it can be inferred that the plant can do well in nutrient solution having Magnesium source (at moderate level).
Corchorus olitorius
Distilled water
Photosynthetic pigment
Biological pigment
Cite
Citations (0)
The research is dedicated to the study of the impact of heavy metals (As, Cr, Cu, Mо, Ni, Pb, Sr, Zn) found in plant samples on photosynthetic pigments in anthropogenic roadside plant communities. In the process of research, the anthropogenic load intensity for the selected sites (1 < 6 < 5 < 4 < 2 < 3) was determined. The analysis of the results showed that the impact of heavy metals on photosynthetic pigment content depends not only on metal toxicity but also on its concentration. A high level was noted for Pb (7.2-10.6), Cr (2.6-4.5), As (0.1-0.9) and Sr (9.4-12.1) mg/kg. The inverse relation between the heavy metal and photosynthetic pigment concentrations was revealed. The research showed that the concentration of chlorophyll a, b and carotenoids changes depending on the growing conditions. Carotenoids are less vulnerable to the negative impact of heavy metals as compared to chlorophylls. A higher concentration of carotenoids is noted in stressing environment. On the one hand, it decreases stress effect; on the other hand, it performs a protective function by preventing destruction of chlorophyll molecules and other organic substances. The obtained data may be used to forecast dynamics of plant populations and communities in the polluted areas and to monitor conditions of natural ecosystems.
Photosynthetic pigment
Biological pigment
Metal Toxicity
Chlorophyll b
Cite
Citations (5)
The mutagenic effect of different x-rays doses were examined on Vicia faba plant by measuring some growth traits, photosynthetic pigments and changes in DNA using RAPD (PCR) analysis. X-rays treatments caused a significant reduction in plant height, plant fresh weight and both chlorophyll (a) and (b) contents. Consequently, there is in strong correlation between the DNA alterations as shown a polymorphic number of genetic bands using RAPD_PCR products comparing with control. Results strongly suggest that x-rays have a mutagenic effect on Vicia faba plant.
Vicia
Biological pigment
Cite
Citations (3)