In the experiment described, the scientist applies petroleum jelly to the underside of plant leaves to block the stomata. The stomata are small openings that allow for gas exchange, including the uptake of carbon dioxide (CO₂) for photosynthesis and the release of oxygen (O₂). They also play a crucial role in transpiration, the process by which water vapor is released from the plant into the atmosphere.
Here's what the scientist is likely to observe:
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Reduced Photosynthesis: With the stomata blocked, the plant will have a decreased ability to take in carbon dioxide. As a result, the rate of photosynthesis will decline, leading to reduced glucose production.
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Decreased Transpiration: While the stomata are blocked, the plant will not be able to effectively release water vapor. This may initially reduce water loss, but it can also lead to an imbalance in the plant's water uptake and usage.
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Water Accumulation: If the plant continues to be watered, water may accumulate in the plant, potentially leading to overhydration.
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Leaf Health: Over time, the lack of gas exchange can lead to stress in the plant. The leaves may start to show signs of wilting, yellowing, or other forms of distress due to insufficient photosynthesis and potential accumulation of harmful gases.
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Growth and Development Impact: Overall growth may slow down or become stunted due to the reduced availability of energy from photosynthesis.
In summary, the scientist would likely observe reduced photosynthesis, decreased transpiration, potential water accumulation, and negative effects on the overall health and growth of the plant.
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