Final Review Flashcards
Gastrodia elata is used in Chinese medicine for treating:
Alzheimer’s and Parkinson’s
Protocorm germination (12 weeks) has a ________ association
Mycorrhizal
What species does the largest seed belong to?
Coconut, Lodoicea maldvica
Composite flowers have what 2 kinds of flowers?
Ray flowers and disk flowers
Composite flower seeds are called?
Achenes
Strawberries are not true berries because?
Each “seed” is a achene fruit and the flesh is the receptacle
What is a caryopsis, typical of grass?
a dry one-seeded fruit in which the ovary wall is united with the seed coat
Describe an aril
A seed accessory tissue on the seed coat from which mace is made from nutmeg seeds
Where is the acellular endosperm in a coconut?
It is the coconut meat, and the liquid endosperm is the coconut water.
Where is the perisperm?
It is inside a seed, surrounded by the cotyledons and radicle
what is a nucellus?
the central part of an ovule, containing the embryo sac.
Describe silique dehiscence and its importance.
It is the process by which mature seeds are released from fruits that split.
Describe funicular abscission.
It is the intentional cell death of a point on the seed funiculus (umbilicus). which releases the seed.
Ocean currents of the Gulf stream carry buoyant seeds from where to where?
Carribean to Northern Europe
Wheat awns move in response to what as an aid to seed dispersal?
Humidity
Define geocarpy in seeds.
Self drilling with a coil that expands and retracts
Define cold stratification.
A process to break seed dormancy with cold temps and moisture.
What unfavorable conditions can induce a second dormancy in seeds?
Anoxia
Unsuitable temps
Darkness
Describe hard seed.
Surface is a “scarification” with a waxy cuticle that interferes with water uptake.
Testa pigmentation mutants are called?
Transparent testa (tt)
How is reduced dormancy inherited?
Maternally
Define vivipary.
It is the pre-harvest sprouting of embryos before detachment from the fruit.
The 1926 “Foolish Seedling” disease involved what fungus?
Gibberella fujikuroi. Produced Gibberellic acid which is a plant growth regulator.
Phytochromes are red (R)/far-red (FR) light photoreceptors that control?
photoperception of light and the subsequent adaptation of plant growth and development
