primary root The ?rst root formed by a plant.
primary structure The sequence of amino acids in a protein. PICTURE ...
primary roots. Roots that develop from the crown of a strawberry plant.
proleg. A fleshy, unsegmented leg of caterpillars.
propagules. Any part of a plant from which a new plant can grow, including seeds, bulbs, rootstocks, etc.
primary root
The first root of the plant. It develops in continuation from the root tip.
The primary root originates in the radicle of the seedling. It is the first part of the root to be originated. During its growth it rebranches to form the lateral roots. It usually grows downwards. Generally, two categories are recognized: ...
The primary root emerges through the seed coats while the seed is still buried in the soil.
The hypocotyl emerges from the seed coats and pushes its way up through the soil.
radicle The primary root of a germinating seed.
radioactive An unstable isotope that decays spontaneously and releases subatomic particles or units of energy.
tap root A primary root that grows vertically downward and gives off small lateral roots; occurs in dicots. Root system in plants characterized by one root longer than the other roots. Example: carrot.
lower part of a hypocotyl, which grows into a primary root of seedlings
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
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adventitious roots -- A root that grows from somewhere other than the primary root, for example, roots that arise from stems or leaves.
Roots are further broken down into the primary root and lateral roots that each has apical meristem at their tips. Root hairs are also a common structure on roots.
The part of a plant that is found below ground level, responsible for the uptake of water and minerals from the surrounding soil. There are three main types of root, namely primary, secondary and adventitious, where the primary root forms the main ...
 See also: Plant, Trans, Embryo, Cells, Stem
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