Seed Germination Flashcards
will become shoot - leaves and stems
epicotyl
protected inside the tesda or baby plant
embryo
Formula of seed
Seed plus ripened ova
seed leaf
cotyledon
connection between cotyledon and radicle
Hypocotyl
baby root
radicle
first rudimentary root that has the embryo
radicular
bud that is opposite side to the radicle
plumule
phases of germination
- activation of embryo
- elongation
- emergence of radicle
states that seed germination is a mechanism in which morphological and physiological are altered
activation of embryo
before germination seeds absorb water
elongation
when it has grown out of the covering seed layers
emergence of radicle
seedling growth after radicle emergence
seedling establishment
rapid mobilization of stored food reserves
post germination process
requirements for germination
- gases
- temperature
- water
types of seed germination
- epigeal germination
- hypogeal germination
cotyledons are raised above ground
epigeal germination
cotyledons remain the soil
hypogeal germination
defined as a factor that illicit germination such as light temperature and moisture
trigger agents
factors that must be present in seed germination
germination agent
pattern of seed germination
- phase 1 imbibition
- phase 2 lag phase
- phase 3 mobilization of reserve food
dry seeds take up water rapidly by the process of
imbibition
dry seeds take up water rapidly by the process of
imbibition
embryo expands and the radical emerges from the seed coat
lag phase
water uptake resumes due to a decrease as the seedling grows
mobilization of reserved food
non-living starch endosperm consisting of thin walled cells
starchy endosperm
produce hydrolytic enzymes that contribute to the degradation
aleurone layer
