Pigment Content in Plant Leaves as a Bio-Indicator of Adaptability to Growing Conditions

2021 ◽  
pp. 197-217
Author(s):  
Eugene M. Lisitsyn
Keyword(s):  
Pigment Content ◽  
Plant Leaves ◽  
Growing Conditions

scholarly journals Peculiarities of pigment complex functioning of winter wheat plants depending on the fertilizer application method

2021 ◽  
Vol 12 (3) ◽  
pp. 7-16
Author(s):  
Z. Bilousova ◽  
◽  
V. Keneva ◽  
Y. Klipakova ◽  
◽  
...  
Keyword(s):  
Winter Wheat ◽  
Magnesium Sulfate ◽  
Chlorophyll Content ◽  
Photosynthetic Apparatus ◽  
Fertilizer Application ◽  
Pigment Content ◽  
Plant Leaves ◽  
Significant Difference ◽  
Foliar Treatment ◽  
Pigment Complex

To obtain the maximum yield of winter wheat, it is necessary to further optimize the existing cultivation technologies in the direction of their adaptation to changing environmental conditions. One of the areas of adaptation of plants to adverse abiotic factors is the active functioning of the photosynthetic apparatus, which depends on the amount of nutrients introduced. The influence of fertilizer application on the condition of the pigment complex of winter wheat plants in the conditions of the Southern Steppe of Ukraine has been studied. Two varieties of winter wheat were selected for the study: Shestopalivka and Mason. The experiment scheme involved the application of fertilizers at sowing (K0; K12) and foliar treatment with various tank mixtures (urea; urea + magnesium sulfate; urea + magnesium sulfate + potassium monophosphate). The pigment content has been determined by grinding fresh leaves of winter wheat, followed by the addition of a solvent in the form of acetone. Measurements of pigments were performed using a spectrophotometer. According to the research results, it was established that before the foliar treatment the a-chlorophyll content and carotenoids was higher in the plant leaves of the Shestopalivka variety. At the same time, the b-chlorophyll content on the contrary was higher for plants of the Mason variety by 17%, which may be due to the adaptation of plants of this variety to lack of light. On the 3rd day after foliar treatment, a decrease in the pigment content in the plant leaves of all experimental variants has been observed, which was due to the active growth of the photosynthetic surface and a decrease in the total dry matter mass. There was no significant difference between the varieties of the content of photosynthetic pigments in this period. On the 10th day after foliar treatment, an increase in a- and b-chlorophyll content has been observed for both studied varieties, which may be the result of adaptation of the photosynthetic apparatus of winter wheat plants to lighting conditions. Foliar treatment of winter wheat plants with a tank mixture of urea with magnesium sulfate and potassium monophosphate contributed to a further increase in the content of a-chlorophyll by 12-23%, and b-chlorophyll by 5-37% depending on the variety compared to the control. The results of the research testify to the high efficiency of complex application of nitrogen-phosphorus-potassium fertilizers for foliar treatment of winter wheat plants in the BBCH 31 stage, both against the background of pre-sowing application of potassium fertilizers and without it.

scholarly journals COLOMBIAN STRAIN OF DUNALIELLA SALINA AS A SOURCE OF METABOLITES OF HIGH COMMERCIAL VALUES

2017 ◽  
Vol 9 (4) ◽  
pp. 32
Author(s):  
Gallego Cartagena Euler ◽  
Castillo RamÍrez Margarita ◽  
MartÍnez Burgos Walter
Keyword(s):  
Population Growth ◽  
Cell Count ◽  
Dunaliella Salina ◽  
Pigment Content ◽  
Total Carotenoids ◽  
Significant Difference ◽  
New Antibiotics ◽  
Growing Conditions ◽  
Level Of Significance ◽  
Biotic Resource

Objective: The objective was to evaluate the effect of stressful and non-stressful conditions on the growth and production of pigments in a strain of Dunaliella salina (D. salina) isolated from the artificial saline of Manaure municipality, department of La Guajira, Colombia in laboratory conditions.Methods: Two treatments were performed, one in non-stressful growing conditions with medium J/1 to 1 M NaCl, 190-µmol. m-2. s-1, 5.0 mmol KNO3, pH 8.2 and another in stressful conditions with medium J/1 to 4.0 M NaCl, 390 µmol. m-2. s-1, 0.50 mmol KNO3, each in triplicate. Population growth was assessed by cell count, and the pigment content was performed by spectrophotometric techniques.Results: It was found that the conditions of stressful influences in the growth and the production of carotenoids of D. salina in comparison with those cultures not stressed. There was a significant difference between the average values of total carotenoids in the experiment with stressful conditions with 9.67±0.19 µg/ml and the experiment with conditions not stressful with 1.54±0.08 µg/ml at the level of significance of p<0.05.Conclusion: It was demonstrated that the stressful condition in the culture is associated with an increase in the production of lipophilic antioxidants, among these carotenoids. The knowledge of the stressful conditions for the production of carotenoids from D. salina isolated from the saline of Manaure opens a field in the use of this biotic resource with biotechnological purposes, production of new antibiotics, nutraceuticals and/or production of biofuels.

Ectodesmata as Revealed By Freeze-Etch Preparations of Plant Epidermal Cell Walls

1973 ◽  
Vol 31 ◽  
pp. 468-469
Author(s):  
N.C. Lyon ◽  
W. C. Mueller
Keyword(s):  
Electron Microscopy ◽  
Acetic Acid ◽  
Nitric Acid ◽  
Oxalic Acid ◽  
Light Microscopy ◽  
Epidermal Cell ◽  
Cell Walls ◽  
Plant Viruses ◽  
Plant Leaves ◽  
Thin Sections

Schumacher and Halbsguth first demonstrated ectodesmata as pores or channels in the epidermal cell walls in haustoria of Cuscuta odorata L. by light microscopy in tissues fixed in a sublimate fixative (30% ethyl alcohol, 30 ml:glacial acetic acid, 10 ml: 65% nitric acid, 1 ml: 40% formaldehyde, 5 ml: oxalic acid, 2 g: mecuric chloride to saturation 2-3 g). Other workers have published electron micrographs of structures transversing the outer epidermal cell in thin sections of plant leaves that have been interpreted as ectodesmata. Such structures are evident following treatment with Hg++ or Ag+ salts and are only rarely observed by electron microscopy. If ectodesmata exist without such treatment, and are not artefacts, they would afford natural pathways of entry for applied foliar solutions and plant viruses.

Antipyretic activity of the root extracts of Desmodium Gangeticum

2018 ◽  
Vol 8 (2) ◽  
pp. 20-23
Author(s):  
Raja Sheker K ◽  
Naveen B ◽  
Anil kumar A ◽  
Abhilash G
Keyword(s):  
Gastric Ulcers ◽  
Plant Leaves ◽  
Medical Systems ◽  
Human Race ◽  
Standard Drug ◽  
Root Extracts ◽  
Antipyretic Activity ◽  
Scientific Investigations ◽  
And Control ◽  
Effective Drugs

Fevers are considered as the most important parameters to evaluate and diagnose most of the disease conditions like inflammations, wounds and other infections. There are effective drugs that treat and control the fevers out of which NSAID's are most important ones. They cause notable side effects like gastric ulcers, gastric mucosal perforations etc. which make the use of those drugs limited. Herbs are used to treat various diseases, starting from the evolution of the human race. During this, herbs had been introduced to many types of tests and scientific investigations to prove the activities that herbs possess. The diseases that the herbs are used for are notable in the medical systems like Ayurveda and other systems. The need for the validation of the activities of the herbs and medicinal plants is utmost important these days. The extracts of the plant leaves of Desmodium gangeticum were extracted with ethanol and then investigated for the antipyretic activity in yeast induced pyretic method. The extract was tested in two doses 200 and 400mg/kg. This was found significant when compared to the standard drug.

Photosynthetic activity of spring wheat depending on the conditions of water supply

2020 ◽  
Author(s):  
I.I. Seregina ◽  
◽  
I.G. Makarskaya
Keyword(s):  
Water Supply ◽  
Spring Wheat ◽  
Sodium Selenite ◽  
Photosynthetic Activity ◽  
Wheat Variety ◽  
Sharp Decrease ◽  
Soil Culture ◽  
Growing Conditions ◽  
Spring Wheat Variety ◽  
Excessive Water

Abstract:In model experiments in soil culture, the effect of different methods of treatment with sodium selenite on the photosynthetic activity of spring wheat variety Zlata was studied under extreme growing conditions. Under drought conditions, the inhibition of the growth of the photosynthetic surface of spring wheat plants was revealed. Under conditions of excessive water supply, a sharp decrease in the area of the assimilating surface of wheat plants was observed. The positive effect of sodium selenite solution on the photosynthetic activity of spring wheat plants was established with insufficient and excessive water supply to wheat plants.

Development of simple models for agrichemical uptake into plant foliage

2003 ◽  
Vol 56 ◽  
pp. 61-65
Author(s):  
J.A. Zabkiewicz ◽  
W.A. Forster
Keyword(s):  
Vicia Faba ◽  
Initial Dose ◽  
Plant Leaves ◽  
Linear Relationships ◽  
Plant Foliage ◽  
Mass Uptake ◽  
Uptake Mechanisms ◽  
Simple Models

Pesticide uptake into plants is typically reported as percentage uptake of the amount applied but in studies of the mechanism of cuticular penetration this approach has not been helpful It can be shown that relating percentage uptake to initial dose of bentazone applied to Vicia faba foliage cannot provide pertinent relationships that can be used to explain cuticular uptake mechanisms However applying the principles of Ficks Law and using mass or molar quantities does provide excellent linear relationships between mass uptake and initial dose applied Universal equations can be derived that relate dose uptake to initial dose applied onto plant leaves

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