Copper

Copper [ Plant physiology - Chemistry ]
Abbreviation: Cu

Dictionary of botanic terminology - index of names

Copper deficiency [ Horticulture - Phytopathology ]


	Absence or insufficiency of copper needed for normal growth and development.

Plants suffering from copper deficiency are severely stunted with exceedingly small terminal leaves (often only one fifth or less of normal size). Terminal leaves eventually die and multiple budding occurs immediately below the dead terminal. These buds will also die terminally and often multiple buds will develop on each break giving the plant a "witches broom" appearance

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Holdfast roots [ Botany ]
Dictionary of botanic terminology - index of names

Some species of climbing plants develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place.

Climbing plants, like the poison ivy (Toxicodendron radicans), Boston ivy (Parthenocissus tricuspidata), and trumpet creeper (Campsis radicans), develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place. Usually the Holdfast roots die at the end of the first season, but in some species they are perennial. In the tropics some of the large climbing plants have hold-fast roots by which they attach themselves, and long, cord-like roots that extend downward through the air and may lengthen and branch for several years until they strike the soil and become absorbent roots.

Major references and further lectures:
1) E. N. Transeau “General Botany” Discovery Publishing House, 1994