CIE IGCSE Biology: 复习笔记:6.1.4 Minerals in Plants

CIE IGCSE Biology: 复习笔记:6.1.4 Minerals in Plants

Minerals in Plants

  • Photosynthesis produces carbohydrates, but plants contain many other types of biological molecule; such as proteins, lipids and nucleic acid (DNA)
  • As plants do not eat, they need to make these substances themselves
  • Carbohydrates contain the elements carbon, hydrogen and oxygen but proteins, for example, contain nitrogen as well (and certain amino acids contain other elements too)
  • Other chemicals in plants contain different elements as well, for example chlorophyll contains magnesium and nitrogen
  • This means that without a source of these elements, plants cannot photosynthesise or grow properly
  • Plants obtain these elements in the form of mineral ions actively absorbed from the soil by root hair cells
  • ‘Mineral’ is a term used to describe any naturally occurring inorganic substance


Mineral deficiencies in plants


Mineral Deficiencies Table