(Chapter 13) Plant Hormones- Uses of Plant Hormones 0.0 / 5 ? BiologyUses of Plant HormonesGCSEAQA Created by: 14randalloliCreated on: 12-12-17 19:21 Selective Weedkillers Auxins are used in many selective weedkillers Kills broadleaved plants as they have a greater surface area and absorb more weedkiller The hormones make plants grow uncontrollably, killing them Selective weedkillers are sprayed on lawns as they only affect the weeds 1 of 5 Rooting Powder Help propagation as cuttings can grow roots Contains auxins which helps roots to grow Artificial, asexual plant reproduction The offspring plants have identical DNA to the mother plant 2 of 5 Tissue Culture Auxins are used in tissue cultures Artificial, asexual plant reproduction Small numbers of cells are reduced from parent plant and placed in the medium Similar rooting process to when using rooting powder 3 of 5 Fruit Ripening Plants produce ethene to ripen fruits Fruit is picked before ripe so it doen't rot Just before reaches market is is sprayed with ethene so it fully ripens 4 of 5 Gibberellins Gibberellins are used by plants for multiple reasons: Stem elongation Seed dormancy Germination They are often used in horticulture for germination and helping plants flower and grow 5 of 5
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