BIOA02H3 Lecture Notes - Lecture 9: Pollination, Flowering Plant, Starch

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

Lecture 9 gytogenous selfing still occurs in plants if they have temporal/spatial selfing. Self-incompatibility (cid:272)an"t fertilize (cid:449)/ o(cid:449)n pollen have biochemical self-recognition female stigma recognizes the genetic identity of the pollen on its surface rejects the pollen only outcross pollen is able to fertilize the egg. >> eg. apples, pears, cherries are incompatible need outcrossing pollen to grow. >> eg. sage (lever example) has time/space and self-incompatibility allows it to gather pollen w/o any danger of selfing. Main forces: assurance of seed set sheer mechanics, bring female and male gametes together to at least replace the 2 parents produce as many offspring as possible. Inbreeding avoidance create high-quality offspring and avoid inbreeding-depression. Use many different pollinator groups (generalist pollinator plants) Golden rod have thousands of flowers for the whole platform allows many. Pollination syndromes pollinators to do their work at once.