Plant Sci Lab Quiz 6
Terms in this set (36)
A grass fruit that is one-seeded with the pericarp and testa grown together.
Ex. Corn & wheat
Consists of a lemma and palea and the parts in between
Lemma, palea, caryopsis
Only the lemma and palea with no caryopsis
Outermost components of the spikelet
Flowering part of the plant
Outermost component of the flower and the floret
(Bears the awn, if an awn is present)
The thin, paper-like component of a flower or floret, adjacent to the ovary or caryopsis
- It's outer edges are usually overlapped by the lemma
The little stem-like structure upon which the spikelet of some grasses is borne
Central axis of a spikelet containing multiple florets
Central axis of a grass inflorescence
Spikelets attached directly to the rachis without any connecting stem or branch
Consists of the two glumes and all that lies between
How can you differentiate between a panicle and spike?
The spike has spikelets that are sessile to the rachis
The panicle has branched pedicels
What is the name given to the central axis for small grasses?
The central stem of inflorescences across plant groups:
Why is the sterile floret in an oat spikelet so small?
It has no caryopsis
Rye has a ________ inflorescence.
Barley has a ________ inflorescence.
Triticale has a ________ inflorescence.
Triticale is a cross between ________ and ________. What are some advantages to this?
Rye = drought tolerant & durable
Wheat = nutrition
The fungus that causes ergot in rye replaces the __________.
When a combine threshes oats, what specific oat components are collected into the combine's hopper?
What specific wheat components are collected in a combine's hopper?
Why does wheat have a much higher standard test weight (per bushel) than oats?
It contains only the heavy caryopsis without lemmas & paleas
You decide to make a loaf of bread, but don't have any bread flour. But you do have a container of pancake flower - should you use it to make a loaf of bread, or go to the store and purchase a bag of bread flour?
No, because it won't rise well (not enough gluten in it)
Market classes of wheat: Soft White (uses + location)
Crackers and pastry
Market classes of wheat: Hard Red Winter (uses + location)
The bread belt (up through wyoming & montana)
Market classes of wheat: Soft Red Winter (uses + location)
Crackers and pastry
Southeast US (up through illinois, indiana, ohio, etc.)
Market classes of wheat: Hard Red Spring (uses + location)
Northern US (North Dakota/Montana)
Market classes of wheat: Durum (uses + location)
Noodles (macaroni, spaghetti, couscous)
Northern US (north dakota, montana, south dakota, minnesota)
A protein in wheat endosperm that enables dough to rise
Components of a wheat caryopsis
Endosperm = 83% of the caryopsis; the source of white flour
Bran = 14% of the caryopsis; used primarily for livestock & poultry feeds
Germ (embryo) = 2.5% of the caryopsis; used for human and animal feeds
Grown primarily for livestock feed
Large quantities are used in the production of malt
Some barley is processed by removing the lemma and palea (used in soups)
Fit well into many rotations as a companion crop, forage crop, and cash crop
Used for livestock feed, straw, human consumption (oatmeal, cheerios, cookies), etc.
25-35% of the rye crop is used for grain - rest for forage, cover cropping, or green manure crop
Grain/fruit of rye used for feed, rye flour, & production of alcohol
- lemma and palea does not close tightly around the maturing ovary, permitting entry of "foreign" pollen; predisposes the grain to
(may cause abortion and/or death to humans & animals)