What are the most photosynthetic?
Answer and Explanation: Most photosynthetic cells will be found at the leaves of the plant.
What are photosynthetic activities?
Photosynthetic activity is defined as a function of leaf area development, photosynthetic rate, and source-sink ratio responses. Leaf area development response to stress is defined as a function of growth habit differences on leaf number and blade size.
Which wavelengths of light allow for the greatest photosynthetic activity Why explain in terms of reflected and transmitted light?
The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm). Therefore, the best light sources for photosynthesis should ideally emit light in the blue and red ranges.Sep 4, 2018
Which plant pigment s will allow for the maximum amount of photosynthetic activity?
To perform photosynthesis, violet light is the most important color, and it's from these wavelengths that plants get most of their energy. The reason for this is because out of the visible spectrum, red light is the longest wavelength light that the photosynthesis process can use, but it has the least energy.Sep 30, 2021
Where do you find more photosynthetic activity in a leaf?
In leaves, cells in the mesophyll (the tissue between the upper and lower epidermis) are uniquely suited to carry out photosynthesis on a large scale. This is due to their high concentration of chloroplasts, which are the sites of photosynthesis. More chloroplasts means more photosynthetic capability.
Which is essential for photosynthetic activity for plants?
Light is essential for photosynthesis in autotrophic cultivation.
What wavelengths of light does chlorophyll a absorb best?
All plants, however, has chlorophyll a, which absorbs most strongly at ~450 nm, or a bright blue color. This wavelength is strong in natural sunlight, and somewhat present in incandescent lights, but is very weak in traditional fluorescent lights.
Would you expect to find photosynthetic activity at all wavelengths?
Would you expect to find photosynthetic activity at all wavelengths? Photosynthesis would not occur at a white light source because the chloroplast contains two pigments called chlorophyll a and chlorophyll b. The colors red, violet, and blue would be absorbed except green.
What procedure would be the most useful to increase the mean height at first flowering?
What procedure would be the most useful to test the effect of selection for height at first flowering on the mean height of the plants? Select plants for breeding that are closest to the average height of the population. Use the entire population for breeding, but increase the amount of fertilizer and light.
Which pigment occurs in all photosynthetic eukaryotes?
Chlorophyll is found in virtually all photosynthetic organisms, including green plants, cyanobacteria, and algae. It absorbs energy from light; this energy is then used to convert carbon dioxide to carbohydrates.
Which photosynthetic pigment absorbs the most sunlight?
ChlorophyllPhotosynthetic cells contain special pigments that absorb light energy. Different pigments respond to different wavelengths of visible light. Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly.
Which pigments are most effective for photosynthesis least effective?
An instrument that measures the ability of a pigment to absorb various wavelengths of light. What colors/wavelengths of light are most and least effective for photosynthesis? Violet and red are most effective, since they are absorbed. Green is least effective and is reflected.
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Abstract
This study was conducted to investigate and effects of shading treatment on photosynthetic activity of Acanthopanax senticosus. We investigated plant growth, light response curve and A-Ci curve to photosynthesis of A. senticosus at 55%, 75%, and 90% shading treatment.
References (10)
This study was conducted to examine the effect of humidification and shading during cutting propagation on growth and development of strawberry (Fragaria x ananassa Duch.) 'Maehyang' plants at a propagation stage. The runner cuttings were stuck on Nov. 23, 2017 in propagation benches set in a Venlo-type glasshouse.
What are the effects of salicylic acid on photosynthesis?
Exposure of wheat plants to a low temperature (3 oC) for 48 h and 72 h resulted in decreased levels of chlorophyll, CO2 assimilation and transpiration rates and increased activity of GO and CAT. Treatment with SA alone for 24 h resulted in a lower rate of photosynthesis, decreased transpiration and stomatal conductance accompanied with enhanced rate of lipid peroxidation and peroxides level. Treatment with 500 µmol/L SA for 24 h before exposure to chilling provided protection on RuBPC activity and chlorophyll content. The activities of GO, CAT, POX, and APX additionally increased in SA-treated plants. The impact of SA and cold on photorespiratory and antioxidative
What is nanotechnology? What are its applications?
Nanoscience is the branch of science which presents applications in diversified fields of pharmaceuticals, medicine, electronics, cosmetics, water treatment, agriculture and environmental remediation. Particularly, nowadays, nanomaterials are in high demand in the field of agriculture for enhanced crop production, reduced nutrient loss and increased crop yield. The green revolution caused the random use of chemical fertilizers and pesticides which resulted in a loss of soil fertility, loss of nutrient and development of resistance against pathogens and pests. In recent years, the use of nanotechnology in the field of agriculture provided a new platform related to the concept of nanofertilizer and nanopesticide usage. Nanomaterials with a particle size less than 100 nm not only influence the important life events of plants but also affect the serious hazardous effects of the pesticides. Nanofertilizers and nanopesticides improve the crop quality and yield by delivering the required macronutrients and micronutrients and the pesticides in a controlled manner for longer duration which overcomes the problems associated with conventional chemical fertilizers and pesticides.
How does salicylic acid affect plants?
Salicylic acid (SA) is an important signal molecule modulating plantresponses to stress. It is recently reported to induce multiple stresstolerancein plants including drought. An experiment was, therefore, conducted toascertain the effect of salicylic acid on the growth and metabolic profile ofwheat seedlings under water stress. Irrespective of the SA concentration (1–3 mM) and water stress, SA treated plants showed, ingeneral, a higher moisture content, dry mass, carboxylase activity of Rubisco,superoxide dismutase (SOD) activity and total chlorophyll compared to those ofuntreated seedlings. SA treatment, under water stress, protected nitratereductase (NR) activity and maintained, especially at 3 mM SAconcentration, the protein and nitrogen content of leaves compared to watersufficient seedlings. Results signify the role of SA in regulating the droughtresponse of plants and suggest that SA could be used as a potential growthregulator, for improving plant growth under water stress.
What is the role of sunlight in plants?
Of those environmental signals, sunlight is of utmost importance as a source of energy for plants. In sunlight, wavelengths in the UV region are divided into UV-A (315–400 nm), UV-B (280–315 nm), and UV-C (100–280 nm) radiations (Björn 2015 ). However, wavelengths below 290 nm are absorbed by the ozone layer and atmospheric oxygen, therefore are not detectable at the Earth’s surface (Rowland 2006 ). As a consequence of human activities worldwide, the chemical composition of the atmosphere is changing. A reduction in the stratospheric ozone layer is dangerous for most of the Earth's population as it leads to a higher level of UV-B radiation on Earth’s surface (Bais et al. 2019; Bornman et al. 2019 ). Due to the high sustainability of chloro-fluorocarbons (an industrial gas), the ozone layer is under the threat, and even if all the nations execute the Montreal Protocol, it is not possible to reduce the UV-B level reaching on the Earth surface to its pre-industrialization era by 2050 (Mohammed and Tarpley 2010 ). Though in the solar spectrum UV-B radiations consist of only a small part, it’s high energy can degrade vital molecules like lipids, proteins, nucleic acids, and phytohormones (Jansen et al. 1998; Singh et al. 2012; Kataria et al. 2014a, b; Vanhaelewyn et al. 2016 ). The enhanced UV-B radiation drastically hampered the physiological, morphological, and biochemical development of numerous plant species (Kakani et al. 2003a, b; Caldwell et al. 2007; Kataria et al. 2014a, b) and eventually decrease the crop yield (Liu et al. 2013; Kataria et al. 2014a, b ). The morphological alterations by UV-B, such as decrease in plant height, leaf area and leaf length, thicker leaves, reduced internode length, curling of cotyledons/leaves, bronzing/glazing of leaves, chlorosis and necrotic spots in leaves, delayed seedling emergence and flowering have been reported in numerous crop plants (Caldwell et al. 1995, 2007; Robson et al. 2015; Suchar and Robberecht 2015 ).
What is the NBT reduction method?
The standard nitroblue tetrazolium chloride (NBT) reduction method was used to quantify O 2·− in soybean leaves (100 mg) following the method of Chaitanya and Naithani ( 1994) and expressed as µmol g −1 fresh weight of leaves.