BIOL 1105 Lecture Notes - Lecture 5: Herbaceous Plant, Peridium, Casparian Strip
19 Aug 2016
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Document Summary
Meristems growth and development of the plant body occurs at localized regions called meristems. Intercalary meristem allow lengthening of the internode (space between leaf attachments: has protective coverings/structures (root cap/ leaf primordium) Lateral meristems: found in many gymnosperms and eudicots and allow for expansion of the stem and root in diameter, secondary growth, woody plants have two lateral meristems. Gives rise to secondary xylem and phloem (bark) Gives rise to cork cells that form the outer bark of the plant. Atom organelle macromolecule molecule atom. Cell tissue organ organ system organism. Organism population community ecosystem biosphere. Primary vs secondary cell walls: made of glucose polymer, cellulose, some cell walls have additional substances that strengthen or water proof cell walls, secondary cell wall is made from additional layers of cellulose and ligin. Different types of plant cells contribute to the three plant tissues: Dermal tissue derived from the embryo or apical meristem and is typical one cell layer thick.
