170 likes | 678 Views
Interactions Among Plant Systems. Biology 10(B). Learning objectives Identify major systems in plants Describe the interactions that occur among systems to carry out vital plant functions. Interactions Among Plant Systems. Organ systems: Shoot system – above- ground
E N D
Interactions Among Plant Systems Biology 10(B)
Learning objectives • Identify major systems in plants • Describe the interactions that occur among systems to carry out vital plant functions • Interactions Among Plant Systems
Organ systems: • Shoot system– above- ground • Root system– below-ground • Tissue systems: • Dermal – barrier • Ground – metabolic functions • Vascular– transport • Plant Systems Tissues Dermal Ground Vascular Shoot system Root system
Organ and tissue systems interact to carry out vital functions • Transport • Reproduction • Response • Interactions Among Plant Systems
Movement of needed materials throughout plant • Major function of vascular tissue • Xylem – transports water and minerals • Phloem – transports glucose • Both transport hormones • Transport
Interactions during transport • Root system • Absorbs water and minerals • Shoot system • Ground tissue produces glucose through photosynthesis • Both organ systems • Produce hormones • Vascular tissue transports all materials throughout the plant • Interactions Among Plant Systems
Vegetative propagation– offspring produced from part of a plant organ • Asexual Pollination – offspring produced via pollinated seeds • Sexual • Reproduction Image by Roberto MM [GFDL]
Flower – organ that produces seeds • Fruit – develops around fertilizedovule(s) • Seed – fertilized ovule (embryo) and stored food (cotyledon) surrounded by a protective seed coat • Reproduction by Pollination
Interactions during reproduction • Vegetative propagation • Shoot and root systems: part of an organ produces a new plant • Pollination • Shoot system: flowers are the site of seed pollination and fruit development • Shoot and root systems: produce hormones, transported by the vascular tissue, that regulate flower budding, fruit ripening and seed growth • Interactions Among Plant Systems
Tropisms – plant’s hormonal growth response toward or away from an external stimulus • Examples: • Phototropism – stem and leaves grow toward a light source • Positive gravitropism– roots grow toward gravity (downward) • Negative gravitropism– stem and leaves grow away from gravity (upward) • Response
Interactions during response • Root system • Grows toward gravity • Shoot system • Grows toward light and/or away from gravity • Both systems • Produce hormones • Transported hormones • Interactions Among Plant Systems
Learning objectives • Identify major systems in plants • Describe the interactions that occur among systems to carry out vital plant functions • Interactions Among Plant Systems