Seed Germination Flashcards Preview

Horticultural Science 203 > Seed Germination > Flashcards

Flashcards in Seed Germination Deck (18)
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1
Q

Hormone that interferes with gibberellic acid and inhibits germination; plays an important role in preventing vivipary

A

Abscisic acid

2
Q

Damage to a seed embryo caused by cool temperatures during imbibition that can prevent effective germination

A

Chilling injury

3
Q

A “seed leaf” that is not a true leaf but that still serves a photosynthetic function

A

Cotyledon

4
Q

Group of plant hormones that encourage germination by overcoming the action of abscisic acid

A

Cytokinins

5
Q

A term used to describe the death of small seedlings resulting from attacks by certain soil fungi

A

Damping off

6
Q

Tool used to prick out seedlings from media for transplanting

A

Dibber

7
Q

Part of the seedling shoot above the cotyledons that bears the first true leaves

A

Epicotyl

8
Q

A type of plant that grows on top of something else, such as a tree or rock

A

Epiphytic plant

9
Q

Group of hormones considered the primary stimulus for seed germination that operate by activating enzymes that convert starch to sugar in the endosperm

A

Gibberellins

10
Q

Phrase typically used in the trade to refer to the process of taking a plant from the seedling stage to an established plant

A

Growing on

11
Q

Part of the seedling shoot below the cotyledons

A

Hypocotyl

12
Q

Process in which a seed rapidly absorbs water through the seed coat

A

Imbibition

13
Q

Second stage of germination in which little to no water is imbibed by the seed and enzymes are activated

A

Lag phase

14
Q

Growing point of the seedling shoot

A

Plumule

15
Q

Growing point of the seedling root

A

Radicle

16
Q

Type of dormancy that prevents seed germination during hot, dry summers immediately after the seed reaches maturity

A

Thermodormancy

17
Q

How can you test if a seed is viable?

A

“Float” the seeds in water - those that float are not viable
Cut some of the possibly viable seeds to see if they have a fully developed embryo - if not, the others may not be not viable / underdeveloped (may need longer period of stratification)

18
Q

Three stages of seed germination

A
  1. Imbibition of water
  2. Enzymes activated; Digestion of energy sources; Translocation to growing plants
    3.