What is the primary product of light independent reactions?
The product of light independent reaction is glucose, and reactants are ATP, NADPH, and CO2.
What are the products of light-dependent reaction used to power the light independent reaction?
The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.
Is high energy sugars a product of the Calvin cycle?
What does the Calvin cycle use to produce high-energy sugars? The Calvin cycle uses carbon dioxide molecules as well as ATP and NADPH from the light-dependent reactions to make sugars.
Why stomata open at night?
Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.
Which hormone is responsible for opening and closing of stomata?
Why does light cause stomata to open?
Stomata are responsive to red and blue light wavelengths. The pumping of protons out of guard cells causes membrane hyperpolarization, activating plasma membrane channels that take up potassium ions (K+in channels), thus bringing about an increase in turgor pressure that results in stomatal opening.
Would you expect more stomata in high or low light?
High light intensity during growth increased the stomatal frequency but there were only small changes in the length of the stomatal pore. High-light leaves had more than twice as many stomata per unit area as low-light leaves.
What happens to stomata in the light?
In general, light and drought act in an antagonistic manner on stomatal movement. Light induces the opening of stomata to enhance CO2 uptake, while drought causes stomata to close, thereby limiting water loss through transpiration.
Why do sun leaves have more stomata?
Stomata will be found more in leaves less exposed to sunlight to reduce evaporation or water loss. Species with higher stomatal density tend to be more responsive to the increase in CO2, so the rate of photosynthesis is greater .
How does light affect transpiration rate?
Light intensity: The transpiration rate is increased due to the increase in light intensity. During daytime in the sunlight, the rate of transpiration is faster. This is because the stomata remains open to allow the inward diffusion of carbon dioxide for photosynthesis.
Why are shade leaves bigger than Sun?
Sun leaves become thicker than shade leaves because they have a thicker cuticle and longer palisade cells, and sometimes several layers of palisade cells. The larger shade leaves provide a larger area for absorbing light energy for photosynthesis in a place where light levels are low.
What is the likely benefit of hairy leaves for a plant?
Reducing water loss. Hairy leaves are more common in desert plants than in plants of very moist habitats. Hairs reduce the rate of transpiration by creating a thicker boundary layer – a layer of unstirred air over a leaf where diffusion slows the rate of gas exchange – over the leaf.
Does every leaf need sunlight?
Every plant needs light to grow and flourish, but the right amount of sunlight varies. When choosing plants for your garden, look at the plant label to check its light requirements. No matter what light conditions your garden has to offer, at least something should be able to grow there.
Do plants grow better in sunlight or shade?
Plant Sunlight Requirements Medium light plants that grow in partial sun/shade only need three to four hours of direct sunlight, while plants that thrive in shade need only two hours of sunlight daily. For optimal plant growth, it is important to group plants with similar light requirements together in the garden.