new lecs after ecology Flashcards
Differences in plants than animal ecophysiology
-plants cant run away
- they are autotroph
- photosynthesis need light, water, co2
- leaf, stem and root reflect adaptation to the environemnt
hermaphrodite
both male and female parts
plant stigma does what
plant anthers does what
recieve pollen
bear pollen
Sesile
cant escape hard conditions but tolerate them
Respiration (opposite of photosynthesis)
Breaks down carbs into ATP energy, plant growth needs more carbon for photosynthesis than they lose through respiration, so balance need to be good
what is NET PRIMARY PRODUCTIVITY (NPP)
C gained through photosynthesis - C lost via respiration
Stomata takes in what
Co2
What is plant transpire
lost water through stomata
Big leaf is good for ________ _____ but bad cuz ________ easy and lots of water lost through many ______
harvesting light
overheat
stomata
Most plants fix carbon by _____________
C3 photosynthesis
C3 photosynthesis
RUBISCO enzyme accepts CO2, at high temps, rubisco captures O2 instead of CO2, causes photorespiration which is bad
C4 photosynthesis
Enzyme PEP carboxylase first accept CO2, reduce photorespiration
(PEP carboxylase mog rubisco in accepting CO2)
CAM photosynthesis
Plants close stomata in day to reduce water loss, open at night to let in CO2
Deciduous
Dropping leaves during dry/cold times and doing photosynthesis through stems
Cactus don’t do photosynthesis cuz
Evolved leaf into stem
What is Co2 stored as at night in CAM photosynthesis
MALATE
Episodic rain is what
not consistent “when it rains it pours”
Saguaro Cactus
Extensive shallow shoots, accordian trunk, can absorb 800L of storm
Root “foraging”
split root experiment, same plant but root diff container
Nodules
bacterias on roots that help intake soil nitrogen
Spiny leaves make _______ airflow better for what?
turbulent
Cooling, gas exchange
Smooth leaves have ________ flow what is it?
Laminar, less cooling
Epiphytes
plants that grow on other plants, no roots, just absorb rain water and photosynthetic –> evolvled to hold water in leaves like a pitcher (rosette)
