Stems, leaves, roots and photosynthesis

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Presentation 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

Leaves Blade Petiole Leaf type Simple compound A leaf is a stem appendage with a bud at its base.

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

Tap Fibrous

Photosynthesis/ Respiration 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