Shared Flashcard Set

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PLSC100
second test
25
Plant Sciences
Undergraduate 1
04/02/2012

Additional Plant Sciences Flashcards

 


 

Cards

Term
LIving Fossil
Definition
1. thought to be extinct and discovered again
2. ancient plants, havent changed
Term
Xerophytes

Adaptations
Definition
Live in dry conditions, efficient with photosynthesis

1. whiter color-reflect light
2. stomates open at night
3. reduced leaf size
Term
Madagascar Periwinkle

Saw Palmetto

Pacific Yew
Definition
1. Blood cancers and hodgkin's disease
2. urinary tract infection
3. breast and ovarian cancers
Term
Epiphyte
Lithophyte
Definition
Live on other plants.
live on rocks
absorb nutrients through micorrhizae
Term
Wollemi Pine
Definition
Living fossil-thought to be extinct but isn't. Found in Australia. Native to sub and tropical regions.
Term
Plant naming card
Definition
Common Name

Genus species

Family aceae

center of origin
Term
Rise of:

Land plants
Flowering Plants
Definition
440-500 million years ago

130 million years ago
Term
Orchids
Definition
respond well to technology
pseudo-copulation-moths try to mate with flowers.
epiphytes
micorrhizae
Term
Root functions:
Definition
physical support
water uptake
Term
Tap roots:
Definition
carrots
rutabega
beets
Term
Root anatomy
Definition
root cap-protection
RAM-cell division
zone of cell expansion and differentiation
zone of cell maturation-root hairs primary absorption site
Term
Symplastic/Apoplastic Pathways
Definition
S-moves through the cells cytoplasm (active path)
A-moves through empty space outside cells (diffusion path)
Term
Casparian Strip
Definition
waxy belt around vascular cylinder. Ensures that apoplastic path is used once get there.
Term
C HOPKNS CaFe ManaGed By MiNe Clever CuZn Mo
Definition
Macro- Carbon, hydrogen, phosphorus, potassium, nitrogen, sulfur, magnesium

Micro-Iron, boron, manganese, chlorine, copper, zinc, molybdenum
Term
Why does hydroponics work?
Definition
supplies elements to root
provide O2
provide plant stem with support
Term
Xylem
Phloem
Definition
living and dead cells. moves up
living cells. moves down

-guard cells in stomata open during day
Term
C4 plants

CAM plants
Definition
corn and sugar cane. highly productive, heat tolerant, avoid photorespiration.

CO2 enters stomates at night and is trapped during day. (Desert Plants)
Term
Photomorphogenesis

Examples
Definition
change in plant form in response to light.

1. photoblasty-light stimulation to germinate certain seeds
2. greening of etiolated (no chlorophyll) plants
3. phototropism-growth toward light
4. flower initiation-effect of light on biological clock
Term
Seed Germination
Definition
-germinate in response to environmental conditions
-white or red light
-chlorophyll absorbs BLUE AND RED light. photoblasty promoted by RED light.
-plant responds to last 15 minutes of light.
Term
Phytochrome
Definition
Seed germination, flowering time and dormancy
Term
Cryptochrome
Definition
sense adequate light for photosynthesis and affect flowering
Term
Auxin
Definition
IAA-indole acetic acid

-synthesized at apex and moves down
-leads to differentiation of xylem cells
-root initiation
-cell elongation
-nodes carry suppressed auxin which is enacted if apex is removed
Term
Hormones
Definition
-low concentration
-organic chemicals
-not essential element
-moves from site of photosynthesis to site of activity
Term
Gibberellins (GAs)
Definition
-breakdown starch during seed germination
-essential in beer fermentation
-stem elongation (GA inhibitors used for compact plants)
-GA sprays and girdling increase stem and berry growth. cuts phloem.
Term
Cytokinins (CK)
Definition
-cell division
-counteracts apical dominance
-anti aging
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