Stephanie Wright-Blog Post #4

Since seeing it last, our broccoli plant has significantly changed. Quantitatively, it is now 4 ½ inches tall. Not only has the plant grown taller, but also richer in color as it is a deeper shade of green than before. The broccoli plant also has smooth leaves.
Our broccoli plant moves water through transpiration. When the moisture from the roots reaches the leaves, the water on the underside of the leaves evaporates into the air, transfering the water. The water that eventually evaporates is also part of photosynthesis. Since our plant is growing, it’s safe to say it has participated in photosynthesis.
Our plant takes part in the carbon cycle through photosynthesis as well. During this process, our plant absorbs the carbon in the air, and eventually releases it back into the air. Instead of carbon, oxygen is released as a byproduct. Plants take part in the carbon cycle when they die, too. Dead plants are broken down by decomposers, releasing carbon into the air. I know my plant has been involved in the carbon cycle, as it has been growing. Since it has been growing, it has also taken part in photosynthesis, therefore also being part of the carbon cycle.

In addition to the carbon and water cycles, our plant is involved in the nitrogen cycle. The first way is through assimilation. In this process, plants absorb nitrate or ammonium through their roots. Assimilation helps plants grow by building proteins, as nitrogen is crucial for protein development. Another example of a plant’s participation in the nitrogen cycle is through a plant’s death, whether it is eaten or it slowly dies over time. Though the effects are not immediately shown, the flow of nitrogen continues when a plant is eaten. When the animal that consumed the broccoli plant dies, the animal is decomposed, which releases the nitrogen into the atmosphere. If the plant is not eaten, it will still deteriorate and eventually decompose in which case the nitrogen is still let out into the air. Since our plant would not be able to survive, we can conclude our broccoli plant has been participating in the nitrogen cycle.

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