Unit 15 Growth And Development In Plants Flashcards
Plants only grow when
Their cells are turgid after absorbing water
Plants require oxygen for
Respiration and growth
Plants manufacture all essential organic constituents from
Carbon dioxide, water and inorganic salts
Optimum growth temperature for winter wheat of cool temperate regions is
20-25°C
Optimum temperature for maize in tropical regions is
30-35°C
Chlorosis and stunted growth is due to deficiency of
Nitrogen
Nitrogen is absorbed from the soil as
Nitrate or ammonium salts
Phosphorus is absorbed from the soil as
H2PO4, Orthophosphate
Orthophosphate is a constituent of
Nucleoproteins and phospholipids
Deficiency of phosphorus leads to
Stunted plants and dull dark green colouration of leaves
Phosphorus is involved in energy transfer in plants.
Potassium is absorbed from the soil as
Salts K2
Formation of yellow leaves and premature death of plants is a sign of
Potassium deficiency
Which mineral nutrient is involved in activation of several enzymes and does not occur in organic forms
Potassium
Sulphur is absorbed from the soil as
Sulphate SO4
Deficiency of sulphur leads to
Chlorosis
Sulphur is a constituent of
Some amino acids eg cysteine and cysteine
Thiamine and Enzyme A
