Ch. 1 - Tree biology Flashcards
(95 cards)
meristems
Undifferentiated tissue in which active cell division takes place.
abscission zone
Occurs at petiole. Cell breakdown leads to leaf and fruit drop.
absorbing root
Fine, fibrous root takes up water and minerals, top 12” soil.
adventitious bud
hormones trigger bud growth in abnormal areas.
aerial root
Above-ground root
angiosperm
Plant with seeds born in an ovary - 2 groups: monocotyledons and dicotyledons.
anthocyanin
Red or purple pigment.
antitranspirant
Substance applied to foliage to reduce water loss
apical bud
Bud at the tip of twig or shoot
apical dominance
Condition in which the terminal bud inhibits the growth and development of the lateral buds on the same stem.
apical meristem
Growing point at the tip of a root or shoot
apoplasm
Free space in plant tissue
auxin
any of a group of plant hormones that regulate growth, particularly by stimulating cell elongation in stems
axial transport
Movement of water, minerals, or photosynthates longitudinally within a tree.
auxiliary bud
Bud in the axil of a leaf - also called lateral bud
branch bark ridge
Raised strip of bark at the top of a branch union
branch collar
a swollen area of tissue where a branch meets a tree’s trunk or another branch
bud
small lateral or terminal protuberance on the stem of a plant
buttress root
large, wide roots that grow horizontally from the base of a tree to provide support and stability
cambium
a cellular plant tissue from which phloem, xylem, or cork grows by division, resulting (in woody plants) in secondary thickening.
carbohydrate
any of a large group of organic compounds that includes sugars, starch, and cellulose, containing hydrogen and oxygen in the same ratio as water (2:1) and used as structural materials and for energy storage within living tissu
carotenoid
any of a class of mainly yellow, orange, or red fat-soluble pigments, including carotene, which give color to plant parts such as ripe tomatoes and autumn leaves
cellulose
a complex carbohydrate, composed of long chains of glucose molecules, that forms the primary structural component of plant cell walls, providing rigidity and support to the plant;
chlorophyll
