Allelopathy Lab Essay

INTRODUCTIONThe purpose of this lab was to observe the effects of chemical war among plants. Plant generators compete with some other plants and seeds, for sunlight, and nutrients in order to germinate. In order to win dominance oer other seeds, and reduce competition, plants produce and release a chemical in order to prevent other seeds from germination. This type of chemical warfare is referred to as allelopathy. Allelopathy exists in many parts of the plants such as leaves, roots, stems, or fruits, but not limited to just the plants. These toxic chemicals bed also be found in the surrounding soil, to prevent other plants or seeds from absorbing proper nutrients to stimulate produce. conclaves go away test for the strawman of allelopathic chemicals in plant shoots from the chaparral community. If the hollyhock exhibits allelopathy, wherefore an extract will inhibit the germination, and or growth of the radish seeds.MATERIALS & METHODSThe free radical prepared for this exp eriment in the lab of Professor Sadler at SBVC on the sulphur floor of the HLS building. First, the conventions set up for this lab by gathering leaves that Professor Sadler had already bagged and identified. Each taste was cleaned and striped of everything most importantly the stem, so that all was left was the leaf its self. Then each host weighed out Ten (10) grams of leaves, and then set into a blender with One hundred (100) milliliters or water. The root then blended the leaves and water until the mixture was a very thin fluid. Three (3) folded cheesecloths were placed into a funnel in order to remove any solids from the fluid itself, then poured into a lowly beaker, to be used later on in the experiment. Then each group prepared deuce (2) Petri dishes, by placing three (3) imbueed papers in the crumb of each Petri dish.After the filtered paper was placed into the bottom of each dish, twenty (20) radish seeds (Raphanus sativus) were then placed on top, and evenly distr ibuted throughout both Petri dishes, as to make sure none of them were touching. A final filtered paper was placed on top of the seeds and x (10) milliliterswere of distilled water was poured over the seeds of one Petri dish, the lid was then placed on the Petri dish and tagged stop. In the other Petri dish, the ten (10) milliliters of the filtered and blended mixture was added to the second Petri dish to make sure the filter papers were evenly saturated. The second lid was then placed over the Petri dish and labeled hollycock. The Petri dishes will then sit for a week for germination and then evaluated.RESUTLSAfter one week of germination, the group removed the lids of each Petri dish, and removed each seed that had germinated and measured the length of the entire stem and leaves. disport notice the attached page for the data of each seed. In the Petri dish labeled hollycock, Experiment Group A. the group tested a total number of twenty (20) radish seeds (Raphanus sativus), ou t of the twenty (20) seeds, on that point was only a twenty-five (25) percent of germination, and only five (5) seeds had actually germinated. The length of each seed varied in lengths from the shortest, three (3) millimeters to the longest fourteen (14) millimeters. Each length of all twenty (20) seedlings were added up and divided by twenty (20) and the group averaged 2.7 millimeters in length of the germinated seedlings.In the second Petri dish labeled control, Experiment Group B, out of the twenty (20) radish seeds tested with just distilled water, a percent of eighty-five (85) percent of successful germination, and the actual number was seventeen (17) actually germinated. The length of these seeds varied in sized from the shortest of seven (7) millimeters to the longest of ninety-two (92) millimeters. Each length of all germinated seeds from the controlled group were added up and then divided by twenty (20) and the average length of the germinated seedlings is 19.35 millimete rs.DISSCUSSIONAs a result of this lab it has been upraise that the hypothesis is in fact correct. In reference to the groups data, the radish seeds exhibited allelopathy, but a majority of them not germinating. Allelopathy derives from two separate words, allelon which means each other and pathos means to suffer. It is a type of chemical warfare that is used between plants and against other plants. Oddly enough, experiment group B, the controlled group seeds, that received the distilled water, germinated more then theexperiment group A, the ones that received the blend of water and hollycock leaves. The only riddle that the group faced was that it was difficult to completely blend the leaves of the hollycock plant to make it liquefiable enough to bum around just enough out to pour over the radish seeds.Other variables that could have possibly bear upon germination of the seeds, was but are not limited to, the amount of sunlight that was given to the seeds, and or if the tranqui l was evenly distributed. Although, the group measured out the exact amount of liquid needed for the seedlings, I can only wonder if some of the proteins or nourishments were left in the solid blending in the cheesecloths? In the end the hypothesis was supported by the groups data as the hollycock did exhibit signs of allelopathy.