stems, leaves, roots and photosynthesis. plant body
TRANSCRIPT
Stems, leaves, roots and photosynthesis
Plant body
Modified stems/ Stolon
Modified stems/ Rhizome
Modified stems/ Tuber
Modified stems/ Bulb
Modified stems/ Corm
Leaf
• A leaf is a stem appendage with a bud in its axil
• Major function is as a photosynthetic organ
Leaf arrangement on stem
• Alternate• Opposite• whorled
• Blade• Petiole
• Leaf type– Simple – compound
A leaf is a stem appendage with a bud at its base.
Leaves
Leaf venation
• Parallel ( most monocots)
• Pinnate
• Palmate
• Net
• dichotomous
Parallel
Pinnate venation, simple leaf
Palmately divided, palmately veined
Palmate venation, simple leaf, crenate margin
Dichotomous
Palmate venation, simple blade, entire margin, peltate
Double pinnate compound leaf
palmately compound, pinnate veined
Specialized leaves
• Plantlets• Insectivory• Spines• tendrils
roots
FibrousTap
Photosynthesis/ Respiration
• Photosynthesis• 6CO2 + 6H2O+ sunlight+ green plant C6H12O6 + 6O2 + H2O• Carbon dioxide plus water plus sunlight and green plant yields sugar plus oxygen
plus water
• Cellular Respiration• C6H12O6 + 6O2 + 6H2O 6CO2+ 12H2O + 36 ATP
• Sugar plus oxygen plus water yields carbon dioxide plus water plus ATP
• Don’t worry about balancing the equations just know what happens on each side of the equation