BIOL 331 Lecture Notes - Lecture 18: Preprophase, Spindle Apparatus, Intermediate Filament
12 Mar 2018
School
Department
Course
Professor
Document Summary
Plasmodesmata are involved in cell to cell cytoplasmic connections. Tonoplast is the membrane surrounding the vacuole. Central vacuole, depending on type, can take up as much as 95% of cell space. Each plant root hair is derived from single cells, and they help anchor the plant and increase surface area to maximize water and nutrient uptake. Totipotency is the ability of a cell to divide and produce all cell types of an organism. Differentiated (specialized) plant cells can become totipotent. Organelles move on actin filaments using myosin motors. Microtubules and actin filaments are conserved no intermediate filaments (eg. carotene) Motors myosins and kinesins (positive and negative end) No centrioles or centrosomes mtoc are on plasma membrane and nuclear envelope. Involved in interphase, appressed to the plasma membrane. A transient band of microtubules in pre-prophase. Involved in the formation of a new cell plate. All plant cells have a cell wall. 15-30% of dry weight of a plant cell.
