Effects Of Cytokinins During The Germination Of Brassica Rapa Seeds

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An Investigation of the Effects of Cytokinins during the Germination of Brassica rapa Seeds

Germination is a vital stage in a plants life, but it also plays a significant role in other animals’ (including humans) life cycle. It is the process in which a new plant grows from a seed. Due to the fact that plants are autotrophs; they use the process of photosynthesis to transform sunlight and make their own food. Germination occurs in gymnosperms and angiosperms when the seed is using its own nutrients, before it is able to photosynthesize. “The plant’s success depends on its ability to quickly produce photosynthetic structures because the nutrients contained in the seed will quickly run out” (Investigation description). If it cannot produce
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This is relevant question for the life of plants because cytokinins primarily promote lateral growth (branching out), balanced by auxins (a different plant growth hormone) which combat lateral growth. It is crucial for germination because the endosperm of the seeds contain large amounts of the cytokinin (specifically zeatin), and when the seed germinates, it moves from the endosperm to the root tip where it stimulates mitosis. (Cytokinins, 2016) The hypothesis is that if all other variables are controlled and the levels of treatment are applied to the subjects cohesively, the mustard seeds’ radicle and hypocotyl will grow larger both vertically and horizontally; and therefore the quality of the germinating seed will be higher with the addition of cytokinin (zeatin). This applies and can be supported because in nature, the concentration of auxin and cytokinin are supposed to be equal, and therefore normal cell division is supposed to occur. If the concentration of the concentration of the cytokinin is higher, it is hypothesized that there will be a higher amount of growth and stronger results. Also, the major effect of cytokinins is a stimulation of cell division, and zeatin specifically is known to be synthesized in the roots. In the cell cycle, cytokinins promote the movement from the G2 phase to the M phase, meaning they quicken the process and encourage cells to divide. (Plant Growth Hormones, 2016) Cell division directly correlates to cell growth, and therefore it is hypothesized that with the addition of the hormones promoting cell division, then cell growth will be promoted as

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