Is this a fruit? No, part of the ovary wall is missing
Is this a nut? No, this is the pit of a drupe
Cocos nucifera - coconut
Pit
Seed
Coat
Endosperm
Xanthium: cocklebur
George de Mestral
velvet
crozier
Victor Kiam
The maple fruit is both a samara and a schizocarp.
Ovary wall develops a wing Ovary splits for dispersal
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
http://www.tropicamente.it/immagini%20sito/CATALOG
http://www.mythoO/T/Theobroma%20cacao.jpg
fleurs.com/images/fleurs_tropicales/theobroma_cacao_fleurs.JPG
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
http://www.rz.uni-karlsruhe.de/~db50/FOTO__Archiv/Theobroma%20cacao%202.jpg
ethylene
The hormone______________
initiates the ripening response:
Unripe Fruit
physical
condition
H2C=CH2
chemical
cause
green
chlorophyll
hard
pectin
sour
acid
mealy
starch
odorless large orgs
DNA
RNA
Enzyme Produced
hydrolase
pectinase
kinase
amylase
hydrolases
Ripe Fruit
chemical
cause
physical
condition
anthocyanin
red
less pectin
soft
neutral
neutral
sugar sweet + juicy
small orgs
odor
This same process initiated by ethylene…
…occurring in a…
…causes…
…layer in a pedicel
…fruit abscission
…leaf blade
…leaf senescence
…layer in a petiole
…leaf abscission
Since a carpel (ovary) is really a leaf…these parallel
developmental events make a lot of common sense.
The Three Fundamental Parts…
…of a Seed
…of an Embryo
1. Seed Coat
1. Leaf
2. Embryo
2. Stem
3. Storage
Tissue
3. Root
These functions…. …occur in this part of the embryo
Growth of the shoot
Photosynthesis and Storage
Lifting the shoot above the soil
Producing lateral roots
Penetrating the soil
Shoot apex
Cotyledon (leaf)
Hypocotyl (stem)
Radicle (root)
Root apex