BISC 101 Lecture Notes - Lecture 11: Copper Deficiency, Soil Texture, Plant Nutrition
11 Feb 2018
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Document Summary
Plants cannot live on sugar alone (need nutrients, co2, light and h2o) They get these from dissolved ions in soil water: soil is a living finite resource directly affecting ion availability. Plant nutrition involves relationships with other soil organisms. Some plants get nutrients in other ways: parasitism, carnivory essential nutrients. Hydroponic culture: used to identify 17 essential elements needed by all plants. Required for plant to complete normal growth and development. 9 macronutrients (needed in large amounts = major components of complex molecules such as proteins, nucleic acids, lipids) C, h, o (=96% dry weight of plant), n, k (often limiting), ca, mg, p, s. 8 micronutrients (needed in small amounts, 1 trillion = cofactors in enzyme reactions) Cl, fe, mn, b, zn, cu, ni, mo. When nutrients are limiting plants show symptoms of nutrient deficiencies. Reporter gene is linked to production of light blue pigment; tells farmer when to add p- fertiliser.
