Most Of Photosynthesis Occurs In Leaves Flashcards
Epidermis
Prevents H20 loss, injury, and fungi, sometimes has a cuticle
Cuticle
Additional protection from water loss and infection
Stomates
Exchange between external and internal environment, surrounded by two guard cells
Gas diffusion
CO2, O2, H20 vapor
Guard Cells
Contains chloroplast and 1 large vacuole each
Turgor
Water pressure, allows guard cells to control the opening and closing of the stomate
Below the Epidermis
Palisade layer
Palisade layer
Tightly packed tall cells filled with chloroplast, this is the layer where the majority of photosynthesis takes place
Between the lower epidermis and palisade layer
Spongy layer, air spaces lined loosely arranged cells. The spaces are continuous with the stomates, perform little photosynthesis
Conducting Tissues
Vein bundles include xylem and phloem
Xylem
H2O + dissolved minerals
From To
—————————————————
Roots Stem Leaves
Phloem
Food “glucose”
From To rest of
—————————————————
Leaves The plant
(Whole)
Nutrient types
Autotrophic and heterotrophic
Chloroplast (organelles)
Contain a pigment that acts as an enzyme, contain accessory pigments like carotene which traps green wave lengths
Chlorophyll (the green pigment)
Can not help the green wave length that’s why most plants are green