Biology 2601A/B Lecture Notes - Lecture 11: Interphase, Lignin, Tracheid

• School: Western University
• Department: Biology
• Course: Biology 2601A/B
• Professor: Brent Sinclair

Document Summary

Water and fluid transport: moving fluids in plants. Xylem and phloem: xylem, translocates water and inorganic nutrients from the roots to the leaves, phloem, translocates sugars, proteins and signaling molecules (thin outer ring) From source tissues (e. g. leaves) to sink tissues (e. g. From source tissues (e. g. leaves) to sink tissues (e. g. roots) In animal systems, fluids are generally moved through the creation of positive pressures where pressure can push water. In plant systems, water is pulled rather than pushed: example; sugar maples, trees pump sugar into the xylem which increases the solute concentration which reduces your solute potential which pushes water up, this is an exception. Cohesion and adhesion of water: water can cohere and adhere. In a chem lab: the (cid:373)e(cid:374)is(cid:272)us of that (cid:449)ate(cid:396) (cid:272)u(cid:396)(cid:448)es up(cid:449)a(cid:396)ds a(cid:374)d that"s (cid:271)e(cid:272)ause (cid:455)ou ha(cid:448)e adhesio(cid:374) of (cid:449)ate(cid:396) molecules to the surface and cohesion of the water molecules to each other which creates surface tension.