BIOL 206 Lecture Notes - Lecture 24: Soil Biology, Germination, Plant Cell
Document Summary
Environment: exam- begins with same material with quiz, a sessile organism must respond to their changing environment, external signals are used by plant cells to alter their physiology morphology and development. Drive growth and development: how seeds not to germinate=because of photomorphogenic light permeates soil and lets seed know, seed germination, development, direction of growth, flowering. When an seed makes an embryo= point is to protect embryo until conditions are fair enough for growth. Tough seed coats- virtually impermeable to gasses and water until right conditions- then it takes up water. That is what is needed to digest into simple sugars: malted flower makes the best pancakes ever apparently, two classes of plant molecules are most involved in signal transduction, photoreceptors. Respond to both direction and intensity of light. Influence growth and development---like flower development and stomatal opening. Effective in very small concentrations---but must have receptor for hormone. Synergism and antagonism synergism works together and produces same effect.
