BI111 Lecture Notes - Lecture 5: Endodermis, Indeterminate Growth, Main Stem
Document Summary
Photosynthetic (chlorophylls a and b and carotenoids in thylakoid membranes. ) Shoot system above ground: photosynthetic leaves, stems. Root system below ground: nonphotosynthetic roots. Plant bodies are dendritic: spreading and branched in form. Highly adaptive for photosynthesis & positions flowers for pollination. Vegetative (nonreproductive) shoot: stem with attached leaves and buds, bud gives rise to extension of shoot or new, branching shoot. Reproductive shoot: produces flowers which later develop fruits containing seeds. Absorbs water and dissolved minerals from soil. Organ/tissue system: body structure that contains two (or more!) types of tissues and have a definite form and function. Tissue: group of one (or more!) types of cells and intercellular substances that function together in one (or more!) specialized tasks. Primary cell wall (surrounding plasma membrane and cell contents: cellulose fibers in matrix of hemicellulose, rigid but flexible. Large vacuole (30-80% of internal volume) tonoplast membrane: used for storage and to maintain turgor pressure against the cell wall.
