Why would it be hard to find the ideal light intensity is the temperature were very hot or cold

Answer 1

Finding the ideal light intensity in extreme temperature conditions (either very hot or very cold) can be challenging for several reasons:

1. Plant Stress Responses: Extreme temperatures can cause stress in plants, leading to physiological changes that may alter their response to light. For example, plants might close their stomata to prevent excessive water loss during heat, restricting their ability to utilize light for photosynthesis.

2. Metabolic Rates: Temperature affects the metabolic rate of plants. In cold conditions, metabolic processes slow down, which can mean a plant won't respond effectively to higher light intensities. Conversely, in very hot conditions, a plant may become stressed and unable to process light energy efficiently.

3. Photoinhibition Risks: High light intensity combined with extreme temperatures can increase the risk of photoinhibition, where the photosynthetic apparatus gets damaged due to excess light and heat, leading to reduced photosynthetic efficiency.

4. Variable Light Quality: In extreme temperatures, especially in outdoor settings, light quality can vary due to atmospheric conditions (like haze, clouds, or pollution). This can make it more difficult to identify the optimal light intensity needed for plant growth.

5. Species-Specific Tolerances: Different plant species have varying tolerances to temperature changes and light conditions. Identifying the ideal light intensity for a specific species in varying temperature extremes requires a deep understanding of that species' natural adaptations.

6. Sensor Calibration: Measuring light intensity accurately in extreme temperatures can be technically challenging. Sensors and instrumentation may behave differently in hot or cold conditions, affecting the reliability of the readings.

7. Evapotranspiration: High temperatures can lead to increased evapotranspiration, influencing moisture availability in the soil. This interplay between light, temperature, and water stress can further complicate the determination of ideal light intensity for healthy growth.

In summary, the interplay between temperature and light intensity is complex, and extreme conditions can lead to physiological changes in plants that affect their growth responses, making it difficult to ascertain the optimal light levels needed for healthy development.