The Effect of Gibberellic Acid on Wild Type and Rosette Brassica rapa Plants Intro This experiment was performed to test two hypotheses concerning the plant hormone gibberellic acid and a mutant rosette shaped phenotype of the plant Brassica rapa. This experiment was done in order to test the effects o gibberellic acid on plants and its effect on rosette shaped complexes. The two hypotheses in this experiment are as follows: Hypothesis number one states that Gibberellic acid allows for stem elongation in plants. Hypothesis number two. The rosette complex in the rosette phenotype plant contains less gibberellic acid naturally and therefore grows shorter. Plant hormones are certain chemicals present in plants that control plant growth …show more content…
These not only affect the plant in their specific ways, they also have different effects when they are present in certain ratios with the other chemicals. Plant hormones maintain a delicate balance, and this experiment serves to observe that balance (Campbell and Reese, 2008). There were two types of plants used. Both were of the same species, Brassica rapa but two of the plants contained rosette shaped complexes that were deficient in producing gibberellic acid compared to the wild-type plants. Therefore, they grew smaller and shorter as a phenotype. The Brassicaceae family includes cabbage, cauliflower, spinach, and many others. ( Hypothesis The hypothesis behind this experiment is that the Gibberellic acid has a positive growth effect on the plant and causes it grow larger in height. Materials and Methods The experiment was begun by obtaining four 8 oz. Styrofoam cups and punching a hole through the bottom of them. This hole was for water entry or excess water drainage. Moistened soil was packed to the 1/2 full line in the cup along with 3 fertilizer pellets The cups were labeled the following: Rosette-H20, Rosette-GA, Wild-Type-H2O, and Wild-type- GA.(Handout 1) A small wooden applicator stick was obtained a moistened at the tip with water from the petri dish labeled ‘water.’ This was to be able to attract the seed to the applicator in order to place the seed from its original container into
all treatments contain the same type of soil, are planted in the same size of pan, are exposed to the same amount of sunlight, and are maintained at the same temperature throughout the course of the experiment. ON THE TEST there will be a number of related questions about this section not just the question shown below.
In this experiment we are testing the effect of fertilizer on the speed of plant growth. We prepared a 4 quad cell, 1 control group and 3 experimental groups. So, we had one with no fertilizer, one with three seeds of fertilizer, one with six seeds of fertilizer, and lastly, one with nine seeds of fertilizer. The plants that we grew were called Wisconsin Fast Plants, members of the crucifer family. These plants are small and easy to grow, but for optimal growth they require continuous fertilizer, water, fluorescent light, and temperature between 18 degrees Celsius and 26 degrees Celsius 24 hours a day. Fertilizers are substances that are put into soils to increase the growth of the plant. There are two different types of fertilizers, synthetic
To perform this experiment we used two pots, wheat seeds, Centimeter measuring tape or ruler, labels(control and experimental) to identify different pots, water, misting bottle, compass used to know the specific direction, soil, wood sticks used for supporting the long leaves of wheat grass, and thread to fence the wheat grass.
might affect the fitness of each variant. In other words which factors might increase plant growth, survival,
After extensive research, I believe that the more acidic the soil is, the slower it will be for the Fast Plants to grow. The soil’s pH is a crucial part in growing a healthy plant because “all plants require different levels for proper growth” (Lovejoy). The independent variable in this experiment is the Acidic buffer solutions; which consist of pH 2, 4, 6, and 7. According to Chemguide.co.uk, “An acidic buffer solution is simply one which has a pH less than 7.” It is very important that we as students understand the effects acidity has on plant growth. Studying the growth of the Wisconsin Fast Plant helps students have a firm understanding of this topic which in turn can help clean and prevent pollution throughout our country, making it a better and safer world for the
A reason as of why the experimental group grew taller would be that maybe the seeds in the control group did not get as much water as the experimental group did. Although there was a controlled amount of water put in each petri dish, there was an extra layer of paper towel on top of the seeds in the control group dish that could have soaked up more water than the experimental group. This factor could deprive the seeds of necessary water, therefore making the seed germination process much harder and could take longer. Also, there was one seed in the control group that did not germinate at all. The water could possibly not have reached that seed in particular. The water was most likely absorbed in the paper towels or other seeds before it even reached that seed in particular.
Triggers production of other hormones, particularly ethylene and ABA, leading to leaf, abscission, abnormal growth, growth inhibition, and cell death
In this practical, six bags containing twelve histrix cactus seeds each were taken and another six bags containing twelve rocket salad seeds in each bag. Each bag was experimented with different concentrations of gibberellic acid to see how fast each would grow. Gibberellic Acid is an organic
The control group is the soil from the backyard while the experimental groups are the potting soil and Haw River soil. One cup of soil and five mL of Pennington Tall Fescue grass seed will be placed in each container. Three cups of waters will be given to the grass every other day and the height of the grass will be measured every week. At the end of the experiment, potting soil with 21% nitrogen had the highest grass grown. The backyard soil was the second highest grass grown with 17% nitrogen and Haw River had the shortest grass with 13% nitrogen.
The experiment commenced with planting over one hundred and thirty Brassica rapa plants. A large abundance was planted to ensure the large diversity of plants, which would also ensure a number of plants would be available to artificially select. Each Brassica rapa was planted with about one hundred and thirty plants to ensure the genetic diversity but this process first commenced by accumulating small plastic pots; it was important that these pots have holes in them so that they could be filled with wick. The small piece of wick would serve as a safety net for the Brassica rapas in case they do not receive water. The wick would temporarily keep the soil moist, so the plants would not immediately face peril. We also kept the soil moist
The main purpose of this experiment is to examine how certain components in an environment can affect the growth pattern of a plant, or in this case, the Lemna minor, or duckweed. In this experiment, we use the pH level as a variable component to examine the population growth of the duckweed.
The control group in this experiment is the group that is grown normally to test the effects of the rest of the experiment’s independent variables. Growing Brassica rapa plants in the control group will allow the other science experiments to be compared to the normal growth of a common Brassica rapa plant. The normal growth of these plants will be important in measuring the other plants to see how their sizes compare and to show how an untreated plant would grow. Because of the nature of the control group, there is no null hypothesis since all the plants should grow at the same rate. If the correct amount of sunlight and water are given to the Brassica rapa plant, then they should grow as a normal Brassica rapa plant would. The purpose of this
This experiment studies the effect of the hormone, Gibberellic acid, on the growth of plants. The hormone increases cell growth and cell division in the stems and leaves of plants. Gibberellic acid is applied on food crops to quicken germination because it is naturally occurring and has a low toxicity (Phillips, n.d.). The purpose for studying Gibberellic acid is to observe how it affects the growth of plants. The Brassica rapa and the rosette receiving the hormone Gibberellic acid will show an increase in their health, wet mass in grams, and dry mass in grams than those that do not receive it.
In this study, hormones were used as GA3 (gibberellin), ABA (abscisic acid), IAA (indole acetic acid), 6-BA (cytokinin), NAA (naphthalene acetic acid). It is difficult to germinate at 25 ℃, but the germination rate is improved under the condition of exogenous IAA. The germination rate of Lambia alone was 20% under 50mg / L-100mg / LIAA treatment. However, with the increase of IAA concentration, the germination rate increased gradually to 40% at 200mg / L, but not 100% Seed dormancy is not completely lifted. But the IAA can indeed be in a certain concentration on the stalk of the seeds of the germination of the promotion of the role. IAA has a certain inhibitory effect on the germination of
As the weather gets warmer, and with spring being just around the corner, many gardeners and farmers are getting prepared to gather materials that they will use to grow their plants this year. One of these materials could be the usage of a synthetic fertilizer, like Miracle Gro, to speed up the growth rate of the plant. As these types of fertilizers become more popular, anyone who may be new to the field of agricultural growth may question on whether or not synthetic fertilizers, like Miracle Gro, actually help in speeding up a seed’s growth rate. This lab will help to determine an answer by looking at types of seeds and how they react with and without Miracle Gro.