BIOC31H3 Lecture : PART 3.docx
Document Summary
Plant physiology (bgyb31) midterm notes [1] y autotrophic: sunlight, co2, h20, mineral nutrients (inorganic ions in soil, e. g. no3 y selective uptake prevents uptake of dangerous things like aluminum. Required nutrients are accumulated to high [] y essential nutrients: have a clear physiological, biochemical role, absence will cause growth/reproduction. Also, the required amount can be so little that it might receive it from its parents as a seed y hydroponics: roots are submersed in defined nutrient medium. Large volume required so that nutrient [] wouldn t change much over time. Use relatively high [] s and change them frequently. Aeration is important to make sure the roots get enough oxygen (preventing root flooding) Essential nutrients are at adequate levels for optimal growth y macronutrients & micronutrients (table) Adequate tissue levels of elements that may be required by plants: obtained from water/carbon dioxide: h, c, o, obtained from soil. Macronutrients: n, p, k, ca, mg, s, si (large amounts of needed).
