NUTRITIONIN

PLANTS

What is the relationship of food chain in plant nutrition?

PLANT CELL

What part of plant cell is important in plant nutrition?

LEAVES are specialized organ for photosynthesis

http://en.wikipedia.org/wiki/File:Photosynthesis.gif

CHLOROPLAST: Parts

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.

Grana ----granum stomata --- stoma

CHLOROPHYLL --- absorbs and traps sunlight

PHOTOSYNTHESIS

--- (Greek word photos = light; synthesis= putting together)

--- process by which plant converts energy from the sun provide energy for all life forms.

Equation of Photosynthesis

CO26 H2O 6 O2

C6 H12O6 6

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

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.

PHOTOSYSTEM

--- are arrangements of chlorophyll and other pigments packed into thylakoids.

--- transfer the energized electron transport chain.

The electron in the Photosystem II provide the energy to make ATP

The electron in the Photosystem I reduce the coenzyme NADP+ to NADPH

Photosystem II regains electrons by splitting water and releasing oxygen humans and animals need to survive.

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

MELVIN CALVIN

--- famous of his experiment of the chemical process of photosynthesis.

Light Independent ReactionsLight –Dependent Stage

RuBP == ribulose biphosphate

-- Captured Carbon Dioxide G3P == Glyceraldehyde- three- phosphate PGA == Phosphoglycerate Phosphoglyceraldehyde or PGAL

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

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

What do you think is the importance of photosynthesis?