germination Flashcards
germ
embryo of a seed
germination
the sprouting of a seed
what is germinaiton cultivated by
envi cues
germination steps
pre emergence
emergence
pre emergence steps
water absorption
stored food digestion
cell growth
cell division
pre emergence water abosrbion
seeds swell as they absorb water
also called imbibition
pre emergence stored food digestion
water activates enzymes that break down stored food to support growth, and sent to places in seed
pre emergence cell growth
cell enlargement with turgor pressure
pre emergence cell division
mitosis from meristematic tissue
emergence steps
radicle emerges
hypocotyl emerges
epicotyl growth
emergence radicle emrges
root, first thing to emerge
primary root
emergence hypocotyl emerges
stem
grows upwards to form elbow hinge
pulls remains of seed above surface
emergence epicotyl growth
shoot
cotyledons might shed coat and contains apical meristem
does the epicotyl have to push through the soil on its own in dicots
yes
where do cotylons go in dicots
undergrounf
does the hypocotyl form the elbow hinge in monocots
no
what remains underground for monocots
cotyledon, remaining endosperm, and seed coat
vernalization
prolonged period of cold necessary to induce seed germination
photoblastic
seeds that have a response to light during germination
posotively photoblastic
req light to germinate
both light and hormone signals involved
hormones involved in photoblastic
gibberellins
seed mucilage
mucilage around the seed coat that swells up when hydrated
function of mucilage
facilitate water uptake
seed dispersal
maintain dormancy
why can inhibiting seed germination be helpful
to prevent sprouting in fruit
