Lecture 17

Question 1

Zygote

Answer 1

the beginning of a new plant. Formed by the fertilization f the ovule by the pollen.

Question 2

Senecsense

Answer 2

natural process that occurs as the plant deteriorates and then dates.

Question 3

Germination

Answer 3

the sequence of events which begins with eh absorption of water and leads to the growth and development of the seedling.

Question 4

What is needed for germination

Answer 4

1. ) suitable amount of water.
2. ) Suitable temperature.
3. ) adequate oxygen
4. ) Absorption of water called inhibition.

Question 5

Soil formness

Answer 5

If the soil is firm, the moisture will be in close contact to the seed and easier for the seed to take up.

Question 6

Soil water content:

Answer 6

Too much or too little water will inhibit germination.

Question 7

Rate of Imbibition

Answer 7

composition of the seed.

Question 8

Seed Coat

Answer 8

Some seeds have seed coats that are initially impermeable to water

Question 9

Seed decay

Answer 9

when the seed sits too long with beginning germination, and micro-organisms begin feeding on it.

Question 10

Dicot germination

Answer 10

1. ) epigeal

2. ) Hypogeal

Question 11

Epigeal germination

Answer 11

the hypocotyl pushes the cotyledons above ground

Question 12

Hypogeal germination

Answer 12

The cotyledons remains below ground

Question 13

Good germination

Answer 13

1. ) Seed viable (is the seed alive and have no impediments to germination).
2. ) Seedling depth
3. ) Seedling vigor (enough strength and health to grow into a healthy plant).

Question 14

Types of dormancy

Answer 14

1. ) Exogenous

2. ) Endogenous

Question 15

Combination of both an Exogenous and Endogenous would be called a ?

Answer 15

Double dormancy

Question 16

Exogenous

Answer 16

dormancy due to physical constraints.The hard seed coat prevents the entry of water or oxygen for gemination to begin.

Question 17

Endogenous

Answer 17

Also called embryonic or physiological dormancy

• Over come endogenous dormancy
• Stratification
• Chemical block.

Question 18

Heat treatment

Answer 18

Some plants have their exogenous dormancy overrode by being exposed to short periods of high heat such as boiling water.

Question 19

Stratification

Answer 19

Some seeds won’t terminate until they have been exposed to cool temperates with oxygen and moisture present.

Question 20

Viability

Answer 20

The ability to germinate in suitable conditions are present.

Question 21

Longevity

Answer 21

The length of time a seed can remind dormant and still be viable.

Question 22

Longevity: depends on:

Answer 22

1. ) Plant species
2. ) growing conditions
3. ) Storage conditions

Question 23

Storage conditions

Answer 23

The higher the temp and moisture content, the faster the respiration and more conducive to disease therefore the shorter the longevity.