Lecture 5.6

Leaf functions: photosynthesis, and storage morphology: blade, petiole, stipules, sheath, venation (pinnate, palmate, parallel) simple leaf compound leaf (rachis + leaflets) pinnate compund leaf palmate compund leaf anatomy: upper and lower epidermis, stomata mesophyll palisade parenchyma spongy parenchyma vascular bundle: xylem, phloem parenchyma: a tissue consisted of living cells with thin cell wall collenchyma: a tissue consisted of elongated living cells with unevenly thickened nonlignified primary cell wall leaf abscission abscission zone: short cells with poorly developed wall thickenings, hydrolysis of cell wall cellulose, tyloses forming in the trachery elements modified leaf: onion - for storage, adaptation to dry environment cabbage - for storage, adaptation to cold environment cactus - protection from herbivory, adaptation to dry environment flowers - sepals, petals, stamens, carpels, for reproduction