Sun vs Shade Flashcards
plants show ash optimal – response curve both light capture and CO2 fixation are narrowly adapted to a given – range
temperature
leaves may have specialized anatomy to deal with excess light: –, salt glands, specialized waxes increase reflection
hairs
excess heat is given off by emission of – wave radiation, sensible heat loss, evaporative cooling
long-wave radiation
leafs conduct solar tracking such that – is always perpendicular to the sun
lamina
a – between lamina and petiole contains motor cells which generate mechanical forces by changing turgor
pulvinus
leaves are angled – the sun in the cooler hours
toward
photo inhibition: reaction center of – is inactivated or damaged
PS II
– photoinhibition is reversible
dynamic
large amounts of excess light energy cannot be used in photosynthesis; non-reversible
chronic photoinhibition
most effective heat dissipator
zeaxanthin
plants grown in shade, leaves are thinner with more – to capture diffuse light
spongy mesophyll
shade leaves are – over large area for light capture
spread
shade plants utilize –
sunflecks
shade plants have – leaf vein length per leaf area (vein density) representing lower capacity to transport water to stomata or sugars in the phloem
lower
meta-anaylses show shifts in A-ci curve parameters globally: Vcmax and Jmax increase with temp explained by – to climate
adaptation
