This document discusses plant reproduction, including the differences between male and female reproductive organs in flowers (pistils and stamens), the process of pollination, various pollinators, self-pollination versus cross-pollination, mechanisms to prevent inbreeding, adaptations for attracting pollinators like bright colors and rewards, co-evolution between plants and pollinators, germination of seeds, conditions required for germination, dormancy, seed dispersal methods, and the role of fruits in seed dispersal.
5. Self vs. Cross
• Self pollination
(black arrow)
– Pollination within
the same plant
• Cross pollination
(red arrow)
– Pollination with
another plant of
the same species
6. Prevention of Inbreeding
• Genetic: incomplete
flowers (some flowers
don’t have both
“male” and “female”
reproductive organs)
9. Inbreeding
• Timing: flower at different times
• Receptive stigma at different times
• Production of pollen at different times
• http://www.youtube.com/watch?v=igkjcuw_n_U
22. Conditions for germination
• Dormancy: resting period, metabolic
processes in the embryo cells are very
slow
• Begins: absorption of water and heat from
soil
• Others need oxygen and light
24. Begins with the hormones
• Need gibberellins to
be released
• Produce enzymes to
break down storage
molecules
• Once the seed coats
swell, can use oxygen