LEAVES The primary PHOTOSYNTHETIC ORGAN FUNCTIONS of LEAVES

LEAVES The primary PHOTOSYNTHETIC ORGAN

FUNCTIONS of LEAVES PHOTOSYNTHESIS Conversion of LIGHT ENERGY into SUGARS CARBON DIOXIDE (CO 2) and WATER (H 2 O) needed RESPIRATION (leaves, stems and roots) Breakdown of SUGAR into ENERGY is needed for GROWTH and to MANUFACTURE other compounds OXYGEN (O 2) needed

FUNCTIONS of LEAVES

FUNCTIONS of LEAVES

FUNCTION of LEAVES

FUNCTIONS of LEAVES TRANSPIRATION DIFFUSION of WATER VAPOR out of leaves through STOMATA GAS EXCHANGE TRANSPIRATIONAL PULL COOLING

PARTS of a LEAF

CLASSIFICATION of LEAVES SIMPLE -one blade /petiole COMPOUND – many leaflets/petiole –rachis

CLASSIFICATION of LEAVES VENATION PARALLEL - monocots NETTED - dicots PINNATE PALMATE

ANATOMY of LEAVES EPIDERMIS Cuticle Trichomes Stomata Guard Cells

ANATOMY of LEAVES

LEAF ABSCISSION LEAF DROP in DECIDUOUS plants

LEAF ABSCISSION

LEAF MODIFICATIONS SUPPORT Thick Petioles Captured Gas

LEAF MODIFICATIONS WATER STORAGE Succulents

LEAF MODIFICATIONS FOOD STORAGE Scales on Bulbs (right) Thick leaves (below)

LEAF MODIFICATIONS CLIMBING Tendrils (right) Leaf petioles (below)

LEAF MODIFICATIONS PROTECTION Spines (right) Bracts (below)

LEAF MODIFICATIONS INGESTION Carnivorous plants Venus Fly Trap (above) Sundew (left)