HORT 2050 Exam 2 LSU Questions And Answers

HORT 2050 Exam 2 LSU Questions And Answers What is plant propagation? art and science of multiplying plants by sexual and asexual methods What is horticulture? The business of propagating and growing plants Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen What does true to type mean? preserve desirable traits The seed mature ovule baby plant with a sack lunch and a jacket Monocot one cotyledon Dicot two cotyledons What are the storage and viability of seed testing? Keep it cold and no moisture When do most garden seeds germinate? in response to moisture and favorable temperature True or False: Many plant species do not germinate even when environment conditions are favorable. True Seed Coat Dormancy seed coats impermeable to water/gases which cannot penetrate to the embryo and initiate germination requires mechanical force Scarification Natural weathering, microbial action, digestion Physical destruction of coat Embryo Dormancy physiological block of germination, hormonal response Stratification Temperature treatment moisture oxygen period of time Natural Dormancy Winter Double Dormancy both seed and embryo dormancy Rudimentary dormancy Embryo continue to develop out of fruit Chemical Inhibitors dormancy chemical in seed coat or fruit prevents germination Inhibition of Water absorb water and swells ruptures seed coating Two physical parts of Embryo growth and development Root shoot Axis Photosynthetic Tissue Radicle An embryonic root of a plant. What happens during Activation of enzymes and Hormones –Enzymes ⇨ convert endosperm to usable forms –Hormones ⇨ promote cell division and plant growth Epigeal growing on the ground empicotle emerges first hypogeal located below the surface of the ground you'll never see the cotyledon hypocotle emerges first Conditions Effecting Germination Adequate Moisture Proper Temp Good Aeration Light or Dark No Pathogen No Toxins vegetative propagation is used for cloning (identical plants) Seedlings What is the product of selective breeding or wild selection? Mutations What is it called when genetic make up of bud is altered? Chimeras What is it called when a portion of shoot is altered? Why do we use clonal propagation? Some plants produce few if any seed dormancy requirements of seed Stem Cuttings hardwood, semi-hardwood, softwood, herbaceous Leaf-bud cutting a cutting that includes a short section of stem with a leaf attached