* Plantengids / Plant guide / Guide des plantes / Pflanzenführer > http://www.kuleuven-kortrijk.be/bioweb/

non-mineral hydrogen (H), oxygen (O), & carbon (C)
primary nutrients nitrogen (N), phosphorus (P), and potassium (K). usually lacking from the soil as plants use large amounts for growth and survival.
secondary nutrients calcium (Ca), magnesium (Mg), and sulfur (S). usually enough in the soil
micronutrients boron (B), copper (Cu), iron (Fe), chloride (Cl), manganese (Mn), molybdenum (Mo) and zinc (Zn).
  • plant cells are totipotent (ie. each cell is capable of producing an entire plant)
  • auxin - rooting compound
  • cytokinins - shooting/leaves
  • gibberellins - elongation of cells
  • hormones / growth regulators
Hormone Function Location
Auxins (IAA)* stem elongation
root formation
apical dominanace
produced in shoot
apical meristem
Cytokinins cell division
produced in roots
Gibberellins (GA)* stem & internode elongation
seed germination
produced in apical portion of root & shoot
Ethylene* abscission fruit ripening produced in leaves, stems & young fruits
Abscisic Acid supression of bud growth
stomatal opening
leaf senescence
mature leaves, fruits & root caps

* horticultural/agricultural applications

via http://www.biology-online.org/11/9_plant_metabolism.htm

Plan Plant Planet

corals actively change their local climate Coral Local Climate