BI111 Lecture Notes - Lecture 26: Gynoecium, Anatta, Fruit Anatomy

6 views2 pages
18 Apr 2016
School
Department
Course
Professor
PLANT REPRODUCTION PT 2 March 9, 2016
oLow chance of being fertilized by another plant
oLow chance of nishing the process
SELF INCOMPATIBILITY
oSame genotype of pollen grain given or not
oTrait under genetic control
oNot very common because many plants self-pollinate
oNormal pollination pollen plus stigma pollen tube grows to penetrate ovary
oNonself : pollen genotype and stigma geno are dierent, pollen tube grows
COST/BENEFITS/ CONSEQUENCES OF SELF INCOMPAT
oGenetic diversity
oLess recessive genes passed on
oSelf weaker, inbreeding problems
DOUBLE FERTILIZATION
oOne sperm nucleus fuses with one egg nucleus to form a diploid zygote
oOther sperm nucleus fuses with central cell, form triploid endosperm tissue
oMore nuclei = more templates for translation and copying, genetic diversity
FRUITS
oMatured or ripened ovary
oProtect seeds
oHelp disperse seeds
oPericarp = fruit wall -> exocarp, mesocarp, endocarp
oThick, *eshy
oHard, dry
oDehiscent open to discharge seeds
oOr indehiscent do not open to discharge seed
DIVERSITY OF FRUITS
oSimple: single ovary with one + seeds
oMultiple : formed from cluster of *owers that fuse together
oAggregate: single *ow with many carpels / ovaries
oAccessory : fruit is derived from tissue adj to carpel not from ovary
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
Monthly
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.