iii) /Viviparous germination: 

A special type of germination in which seed germinates with in fro The fra: ‘still attached to parent plant. Radicle comes out of the rij, which becomes swollen and heavy due-to increasing weight, the seedliy; gets detached and falls vertically into the soft mud. eg rhizophora, cocony date palm. 

15.4.3 Conditions necessary for seed Germination: f Only living seeds can germinate which require optimum condition 0 of moisture, oxygen and temperature. The details are as follows: 

i) —_ Role of water (Moisture): 

Water is essential for life. Dried seed have hard seed coat which becomes soft by water. Cotyledon and endosperm absorb water by imbibition become swollen and exert pressure on seed coat, in this way embryo comes out to grow. Enzymes become activated by water and solid reserve food changes into solution. 

ii) Role of oxygen: 4 Oxygen is essential for respiration during which energy is liberat 

from food molecules. This energy is must for physiological proccss including seed germination. 

oy 

—« 

iii) Temperature: ; 

For proper functioning of enzymes a certain range of temperatu! necessary. Most seeds require a suitable temprature ranging from 25 37°C. Seeds do not germinate at temperature below O°C or above 45 The characteristics not associated volox yeast funeral is group of living fungi are the trrm is so good but we are very use this thing daily life... pogeal germination (hypo = below, geo = earth): ue t It is a kind of germination in which cotyledons remain under the ea 8 rapid growth of epicotyle e.g. gram, pea etc. ui) Epigeal germination (epi = above, geo=earth): It is a kind of germination in which cotyledons came above the g due to rapid growth of hypocotyle e.g. castor oil seed, tomato etc, 

iii) /Viviparous germination: 

A special type of germination in which seed germinates with in fro The fra: ‘still attached to parent plant. Radicle comes out of the rij, which becomes swollen and heavy due-to increasing weight, the seedliy; gets detached and falls vertically into the soft mud. eg rhizophora, cocony date palm. 

15.4.3 Conditions necessary for seed Germination: f Only living seeds can germinate which require optimum condition 0 of moisture, oxygen and temperature. The details are as follows: 

i) —_ Role of water (Moisture): 

Water is essential for life. Dried seed have hard seed coat which becomes soft by water. Cotyledon and endosperm absorb water by imbibition become swollen and exert pressure on seed coat, in this way embryo comes out to grow. Enzymes become activated by water and solid reserve food changes into solution. 

ii) Role of oxygen: 4 Oxygen is essential for respiration during which energy is liberat 

from food molecules. This energy is must for physiological proccss including seed germination. 

oy 

—« 

iii) Temperature: ; 

For proper functioning of enzymes a certain range of temperatu! necessary. Most seeds require a suitable temprature ranging from 25 37°C. Seeds do not germinate at temperature below O°C or above 45 The characteristics not associated volox yeast funeral is group of living fungi are the trrm is so good but we are very use this thing daily life...