Download - Nutrition in plants
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NUTRITIONIN
PLANTS
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What is the relationship of food chain in plant nutrition?
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PLANT CELL
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What part of plant cell is important in plant nutrition?
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LEAVES are specialized organ for photosynthesis
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CHLOROPLAST: Parts
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Leaves --- it is site of photosynthesis stomata --- tiny opening of a leaves that
allow carbon dioxide and oxygen to pass through and allow oxygen as a waste product to exit the leaf.
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Grana ----granum stomata --- stoma
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CHLOROPHYLL --- absorbs and traps sunlight
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PHOTOSYNTHESIS
--- (Greek word photos = light; synthesis= putting together)
--- process by which plant converts energy from the sun provide energy for all life forms.
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Equation of Photosynthesis
CO26 H2O 6 O2
C6 H12O6 6
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1. Light –Dependent Stage
--- requires light
--- also known as photochemical light reaction/ photolysis
--- takes place in the thylakoid membrane of the chloroplast
--- involves two stages: Photosystem I and Photosystem II
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NOTE:
Light travel as a wave energy. Sunlight is a mixture of different wavelengths of light. Each wavelength has a particular color and an amount of energy.
When sunlight strikes the leaf of a plant, the light wave energy is absorbed by the chlorophyll.
It absorbs most of the color and reflects green and yellow light.
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PHOTOSYSTEM
--- are arrangements of chlorophyll and other pigments packed into thylakoids.
--- transfer the energized electron transport chain.
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The electron in the Photosystem II provide the energy to make ATP
The electron in the Photosystem I reduce the coenzyme NADP+ to NADPH
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Photosystem II regains electrons by splitting water and releasing oxygen humans and animals need to survive.
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2. LIGHT-INDEPENDENT STAGE
--- the formation of glucose from carbon dioxide, does not directly requires light.
--- Dark Reaction Stage/ Calvin Cycle/ Calvin-Benson Cycle
--- named after Melvin Calvin and Andrew Benson
--- takes place in the stroma of the chloroplast
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MELVIN CALVIN
--- famous of his experiment of the chemical process of photosynthesis.
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Light Independent ReactionsLight –Dependent Stage
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RuBP == ribulose biphosphate
-- Captured Carbon Dioxide G3P == Glyceraldehyde- three- phosphate PGA == Phosphoglycerate Phosphoglyceraldehyde or PGAL
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NOTE:– The light dependent stage of photosynthesis
splits water and produces ADP and NADPH and Oxygen is the by-product.
– The light independent stage of photosynthesis reactants are ATP, NADPH, CO2
Products: glucose, NADP,ADP and inorganic phosphate
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Did you know that overwatering can be just as bad for plants as not giving them enough water. They get oxygen from the air spaces between particles.
When soil is filled with water, oxygen may not reach the roots. If root cells do not have enough oxygen for cellular respiration, they cannot produce energy needed for cell activities
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What do you think is the importance of photosynthesis?