Phaseolus Vulgaris Experiment

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Bean plants (Phaseolus vulgaris) were provided by the instructor for the experiment at Mount Royal University. There were four or more bean plants in each of the four pots. The first task was to choose the best three plants in each pot based on whether they had two big healthy leaves and so the three plants looked relatively similar. The excess plants were cut out so that each of the four pots contained three plants, making a total of twelve plants. Each of the four represented a different treatment that occurred to the three bean plants in that pot. The pots were labeled treatment one, two, three and four to keep organized. The first step was to remove the terminal bud from all 9 bean plants, all pots except treatment one. Using a scalpel
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The concentration of the auxin was not strong enough to maintain full dormancy of the lateral buds. The application of auxin is also dependent on the stage of development the plant is in for example auxin applied to a fruit tree can either drop the fruit or prevent the fruit from dropping depending on the stage the plant is in (Biology online.,(n.d)).According to scientific journals, like the plant journal, it is stated that cytokinin helps lateral bud growth as it allows the buds to escape apical dominance in plants but when synthetic auxin or natural auxin is applied it limits the amount of cytokinin to the buds causing the lateral buds to be dormant (Dorte et al.,2015). Auxin can be distributed in the plants unevenly due to light and gravity which can be the cause of the lateral buds being different lengths (Chang,A.,(n.d),p.1). Which means treatment one could have had more sunlight then treatment three. This also explains why the bean plants grew towards the sun because the light kills the auxin and slows the steam growth down and the leaves will grow more, hence the growth in the lateral buds

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