The Effect of Stomata Density on the Midrib and Margin of Woody Dicot Leaves
Plants are relied heavily on their ability to exchange water and gases to keep life on Earth alive and well. Tiny, microscopic pores that are found on the surface of stems and leaves in plants are vital in order for this exchange to occur. These pores, or openings, are called stomata (Freeman, 2011). Stomata are mainly open when photosynthesis is occurring, which takes place during the day, and are closed at night. The stomata also tend to open and close in response to various stimuli and physiological states. Stomata density is the number of stomata per leaf area. Photosynthesis is certainly higher at the margin of the leaf rather than the center of the leaf; this is due to the fact that the edge of the leaf can be particularly active, mainly in cooler climate (USA, 2014). Therefore, toothed leaves are more prone to be able to exchange gases more relatively. Furthermore, leaf margin analysis can be used to determine what the climate is during a time period. Back in 150,000-year period, oxygen exchanging gasses within the fossil was documented, thus in this experiment LMA will be tested to see if more stomata are in the margin of the leaves.
In this experiment we will determine the amount of photosynthetic gases that are being exchanged to determine the uptake of carbon dioxide while water and oxygen is being released into the external atmosphere. This data will be used to determine the climate of the environment. In order to determine this, counting of smooth leaves, tooth leaves, and the stomata within the midrib and the edges of the leaves will be accounted for. The null hypothesis will conclude that there is no effect on...
... middle of paper ...
... carbon fixation rapidly denature” (Environmental Correlates of Leaf Stomata Density (Description).").
Since the amount of stomata in each field of view is relatively abundant, it was fairly difficult to keep an exact count of how many each area actually restricted. For future research I would possibly keep a tally or have indications on how I counted the stomata. Overall the results are found to be coherent.
"Environmental Correlates of Leaf Stomata Density (Description)." Environmental Correlates of Leaf Stomata Density (Description). N.p., n.d. Web. 23 Mar. 2014.
Freeman, Scott. Biological Science / Scott Freeman. Upper Saddle River, NJ: Pearson Prentice Hall, 2011. Print.
USA, 2014. Leaf Structure-Function & Writing Lab Reports. University of South Alabama Biological Sciences Department Laboratory Exercise, Accessed February 2014, 11 pages.
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- 8 Density is the ratio between mass and volume, the unit of density for solid or liquid in the metric system is measured in g/ml or g/cm^3. Mass is the quantity of matter in a particular object, the unit for measuring mass of an object is represented in kilogram (kg) or gram (g). Volume is the certain amount of space occupied by an object, the unit for measuring volume of a particular object is either represented as millimeter (ml) or cubic centimeter (cm^3). The purpose of this laboratory investigation is to provide an introduction to the concept and applications of density measurements.... [tags: Measurement, Density, Volume, Mass]
735 words (2.1 pages)
- Density and Alcohol Proof Experiment NAS 236 Introduction Density is proportional to mass over the unit volume. Density plays an important role in estuaries. An estuary is a body of brackish water or saltwater and freshwater. Fresh and salt water is stratified through the water column in estuaries. Fresh water has a density of 1.000 g/cm3 at 4°C. The density of salt water is a bit more, 1025 g/cm3 . In a body of brackish water the fresh water is at the top of the water column and the salt water is under it.... [tags: Water, Density, Liquid, Volume]
708 words (2 pages)
- The objective of this lab experiment was to determine the density of a set of plastic beads by using two different methods and decide which method was better. Density is a physical property that is defined as the ratio of an object’s mass to an object’s volume. Also, density can be described as the measurement of how compact a substance is in a given space. To find an object’s density, it is necessary to measure the object’s mass, the amount of matter present, and volume, the space it takes up. Also when studying density, it is key to note how objects with varying densities behave.... [tags: Density, Buoyancy, Archimedes, Volume]
1195 words (3.4 pages)
- The gametophytes used in this experiment are of C-ferns. They tend to mature and produce spores at temperature of 28oC and conditions of high humidity. The spores that germinate first are hermaphrodites. Hermaphrodites tend to produce a pheromone called antheridiogen. It is this pheromone that causes later germinating spores to become male. In wild type culture of C-ferns, it is expected that there will be a high concentration of antheridiogen since the hermaphrodites are producing antheridiogen.... [tags: population density,sexual development,gametophytes]
1237 words (3.5 pages)
- How does heat affect density. Many people do not realize why certain things or reactions happen. An example of this is why lava lamps work. The heat from the Alka Seltzer mixes the oil and food coloring in our lava lamps together that gives the lava lamp the effect has. For example, in Nelly’s and my case, the heat is the Alka Seltzer. The heat changes the density of the oil and the food coloring. This gives the oil and food coloring a chance to mix and make what appears to be “lava.” The heat makes the molecules in the mixture expand and move slower than when they are in colder temperatures (source 1).... [tags: Lava Lamps, heat vs. density]
519 words (1.5 pages)
- Density can be defined as the overall blackness of an x-ray image. Factors that can change the density of an image include mA, time, and mass. Bushong describes these factors and their relationship with density. mA increases, density also increases. As time increases, density increases. As mass increases, density also increases1. These relationships are part of the foundation used to adjust density in order to get the best image possible. These factors are able to effect the density of an image by adjusting the amount of beams that are reaching the image receptor.... [tags: Water, Density, X-ray, Lead]
1090 words (3.1 pages)
The Effects Of Grain Sorghum Yield From Dry Weight Per M2 ) And Density Treatments On With And Without Atrazine Treatments
- Positive relationship was observed between grain sorghum yield (in dry weight per m2) and density treatments on with and without atrazine treatments (Figure 2). This result was similar to Wu et al. (2010) who found that higher density of sorghum (not less than 7.5 plants per m2) resulted in higher yield, giving 28% more grain yield compare to the less denser treatment in the presence of Japanese millet weed (Echinochloa esculenta). They also found that cultivar played a role in yield under the presence the weed and according to their results, sorghum var.... [tags: Water, Plant, Density, Herbicide]
726 words (2.1 pages)
- Stomata Leaf Peel Count Aim: · To examine the stomata on the upper and lower epidermis of a leaf. · To investigate and find out which side has more and why. Prediction: I predict that there will be more stomata on the underside of the leaf (the lower epidermis) than on the upper epidermis because that way the maximum amount of sunlight can enter the leaf without many stomata blocking the way. Also, a lower number of stomata would increase the surface area and therefore increase the amount of area available for light to hit.... [tags: Papers]
330 words (0.9 pages)
- Stomata Count Experiment Aim To peel the epidermis layer from underneath of the plant leaf and count the average distance between the stomata. Background Info Guard cells open and close to let stomata take in Carbon Dioxide that is required for plants to make glucose in photosynthesis, the Carbon Dioxide comes in through stomata, which consist of guard cells which contract and relax (become turgid and flaccid) depending on the amount of water that inside them making them turgid.... [tags: Papers]
424 words (1.2 pages)
- Mineral Density Introduction There are many types of mineral in the world. A mineral is a substance, which contains only one type of molecule (PbS or NaCl). Minerals occur naturally as homogeneous solids that have a definite chemical composition and a distinctive internal crystal structure. To calculate the density I will be using the formulae: Density = Mass/Volume This will give answer in grams per centimeters cubed (g/cm3) To calculate the density you must know the: · Mass (measured in grams · Volume (measured in cm3) My Aim My aim is to calculate the density of some common minerals.... [tags: Papers]
814 words (2.3 pages)
- The History and Events of the Olympics
- Yellow Madness Created in The Yellow Wallpaper by Charlotte Perkins Gilman
- Selfless Self-Discovery Through Serving Others
- Culture and Customs of Equatorial Guinea
- Funcitons of Capillaries and the Digestive System
- The Holocaust: One of the Most Horrific Genocides in History