Ch467 Flashcards
Drupes
fleshy outer layer with stone pit (Ex. peaches)
Pomes
produced by flowering plants; core containing small seeds (Ex. apples)
Veggie subgroups
Bulb, root, tuber, leaves/stems, fruits, seeds
3 main tissue systems
Dermal, vascular, ground
Chlorophyll is…
green
Carotenoids are…
orange
Leucoplasts are…
starch granules
Tonoplasts are…
membranes separating protoplasm from vacuole
Vacuole
flavonoid + water
Parenchyma
FLESHY part of fruits and veggies
Collenchyma
elongated cells that provide supportive structure; more fibrous; CELERY
Sclerenchyma
woody cells that provide gritty texture; PEAR
Cellulose
1,4 beta-glucosodic linkage; insoluble fiber
Hemicellulose
1/2 composed of various sugars; not as rigid, pentose instead of hexose; XYLOSE FOUND!
Protopectin
UNRIPE
Pectin
RIPE
Pectinic acid
de-esterified
Pectic acid
OVERRIPE
Lignin
acts as glue; makes wall rigid and water resistant
During maturation…
cellulose, hemicellulose, and lignin content increases
Senscence
aging process of plants
Climacteric
RIPENS post-harvest; apples, bananas, mangoes, tomatoes, pears, peaches, avocados
Non-climacteric
must FULLY ripen on plant; grapes, strawberries, cherries, citrus fruits, pineapples, watermelon
Ethylene gas
accelerates ripening of fruits
Pectin esterase
degradation of pectic substances
Phosphorylase
enzyme in potatoes that promotes sugar formation during storage
Chlorophyll a
blue-green
Chlorophyllase
breaks off phytyl group
Chlorophyllide
molecule minus the phytyl group
Chlorophyllin
abnormally green pigment with methyl and phytyl groups are removed in alkaline medium
Chlorophyll in acid…
Mg ion leaves = olive-green color
Chlorophyll in alkaline…
becomes more stable, Mg ion in place; bright green color
Carotenoids
Red/yellow/orange
Flavonoids
1-2 aromatic rings
Anthoxanthins > tannins; catechins = tea color
Cruciferae
brussel sprouts, cabbage, rutabagas, turnips, cauliflower - sulfur containing + gassy
Alliin
odorless precursor in garlic
Allinase
responsible for catalyzing the conversion of alliian
Gums
plant origin; galactose unit; thickening agent + low calorie
Starch is composed of…
amylose (linear) and amylopectin (branched)
Color is ____ when amylose is present
BLUE (Range 17%-30%)
Color is ____ when amylopectin is present
PURPLE-RED
Leucoplast
site of starch storage
Hilum
innermost layer of starch granule
Pasting
starches fully broken down
Tapioca starch temp…
68F
Potato starch has a…
stringy texture
Wheat starch is the…
least effective starch
Flour is less effective because of…
protein content
Waxy starch is almost entirely…
amylopectin
Gelation
liquid > gel
Gel = liquid dispersed in solid
Sol = solid dispersed in liquid
Starch gel
Starch paste COOLS and sets
Starch sol
Starch granules dispersed in water but not fully gelatinized; thick not solid
Waxy starches don’t form ____
gels
Arrowroot forms a ____ gel
soft
Cornstarch forms a ____ gel
firm
Wheatstarch forms a ____ gel
strong
Syneresis
weeping of liquid from a gel
Cereal starch sources
oats, rice, wheat, corn
Root starch sources
cassava, potato
Tree starch sources
sago, palm tree, arrowroot, milo
RS1
Physically inaccessible
RS2
Naturally resistant
RS3
Retrograded
RS4
Chemically modified
6 Monosaccharides
Good Friends Go Get Sweet Meals
Glucose
Fructose - K
Gulose
Galactose
Sorbose - K
Mannose
Aldose has a…
aldehyde
Ketose has a…
ketone
Dextrose is…
biologically active
Pentose
Ribose, arabinose, xylose
Hexose
6 monosaccharides
Disaccharides
Sucrose (G + F)
Maltose (G + G)
Lactose (G + Ga)
Ogliosaccharides
3-10; stachyose + raffinose
FODMAP
Fermentable Ogliosaccharides Disaccharides Monosaccharides and Polyols
- fruits, grains, lactose-containing, legumes, sweeteners, veggies
Dextrin
1,4 alpha-glucosidic bond
Dextran
1,6 alpha-glucosidic bond
- bacteria and yeasts
Inulin is…
prebiotic and sugar substitute
Pectic substances
foundation in galactose
Agar
Red algae
Guar
Guar beans
Xanthan
fermentation of sugars
Carrageenan
seaweed