Autogamy
Термины кактусовода
Self-pollination and self-fertilization in plants.
Glossary of terms
A reference section with categories and short explanations.
Adventitious roots
Термины кактусовода
"Waiting roots" - root primordia of cacti that form during prolonged absence of water. In a moist environment they can very quickly activate and develop into a normal root system with its characteristic functions.
Adventive plants
Термины кактусовода
"Foreign" to the given locality.
Acclimatization
Термины кактусовода
The adaptation of plants to new, unfamiliar conditions of growth, primarily soil and climatic conditions.
Axil
Термины кактусовода
A depression, the axil between the tubercles of certain genera and species of cacti, from which flowers and shoots develop.
Alkaloids
Термины кактусовода
Organic nitrogen-containing substances of predominantly plant origin that exert varying effects on the nervous system of animals and humans.
Allele
Термины кактусовода
(From Greek allelon - one another, mutually) - one of two or more alternative structural states of a gene.
Allogamy
Термины кактусовода
Pollination of a flower by the pollen of another flower, but from the same plant.
Alluvial layers
Термины кактусовода
Sedimentary deposits in the form of alluvial layers, accumulating on land under the influence of flowing water.
Anaerobes
Термины кактусовода
Microorganisms capable of living and growing without access to free oxygen.
Apex
Термины кактусовода
The tip of a stem or root where the apical meristem is located.
Apical
Термины кактусовода
Apical, situated closer to the morphological end of a plant organ.
Areole
Термины кактусовода
Characteristic organ of members of the cactus family. It is a thinly hairy cushion, a hairy or downy area at the apex of the tubercles (bumps) on cactus ribs, covered with a typical cotton-like pubescence, bearing modified bud scales (spin…
Arid species
Термины кактусовода
Plants of dry and hot climates.
Arid conditions
Термины кактусовода
Dry conditions in which the total annual precipitation does not exceed 250 mm.
Assimilatory surface
Термины кактусовода
The surface of a plant capable of performing the functions of photosynthesis.
Assimilation
Термины кактусовода
The process by which plants take up substances from the external environment and form from them more complex compounds.
Auxins
Термины кактусовода
(From Greek aichapo - I increase, I grow) plant hormones, indole derivatives, stimulate many growth processes, tropisms, root formation.
Autecology
Термины кактусовода
(From Greek autos - 'self' and ecology) - the branch of ecology that studies the effects of various environmental factors on individual populations and species.
Absorptive power
Термины кактусовода
The rate at which root hair cells absorb water and the nutrients dissolved in it.
Artificial pollination
Термины кактусовода
The transfer by a person of pollen from the flower of one plant to the flower of another.
Assimilation area
Термины кактусовода
See "assimilation surface".
Adventitious roots
Термины кактусовода
Form on shoots, often in the above-ground zone.
Acquired characteristics
Термины кактусовода
Those that were not present in the parents and appear when cultivation conditions change.
Adaptive mechanisms
Термины кактусовода
Adaptive mechanisms. See "adaptation".
Absorbing root hairs
Термины кактусовода
Root hairs that form on branches of the root system when they are wetted with water, which helps to increase absorptive capacity. They die off during prolonged soil dryness.
Angle of sharpening of the povoy
Термины кактусовода
The angle at which the bevel is cut (see below).
Articulate stem
Термины кактусовода
A stem composed of separate segments divided by distinct constrictions.
Absorptive capacity
Термины кактусовода
The level of water uptake of dissolved nutrients by the root system. It depends on the condition of the plant's above-ground parts, the root system itself, and the composition of the substrate.