Glossary of terms

A reference section with categories and short explanations.

Found: 403

Method of propagation

Cactus grower terms

A method of increasing the size of a population. In the cultivation of cacti, two methods of propagation are distinguished: generative propagation (seed propagation) and vegetative propagation: cuttings, offsets, and micropropagation.

Microflora

Cactus grower terms

The community of microorganisms present in the soil.

Micropyle

Cactus grower terms

(From Greek mikros - small, pyle - entrance, opening) - a narrow channel in the integuments of the ovule of seed plants, through which the pollen tube penetrates to the nucellus, the pollen entry.

Mimicry

Cactus grower terms

Resemblance of particular plant organs to various objects of the surrounding environment.

Mineral constituents

Cactus grower terms

Inorganic compounds of macro- and microelements that are introduced to or present in the soil, mostly phosphate, sulfate and carbonate salts of potassium, calcium, sodium and magnesium.

Mineral substrate

Cactus grower terms

Substrate that does not contain organic components (organic matter).

Modifications

Cactus grower terms

Changes in an organism's phenotype not associated with changes in its genotype.

Monoculture

Cactus grower terms

Cultivation of a single plant species.

Monotypic genus

Cactus grower terms

A genus represented by only one species.

Monstrose form

Cactus grower terms

A growth anomaly that leads to the formation of peculiar ("deformed") specimens consisting of many unevenly growing shoots.

Morph

Cactus grower terms

(From Greek morphe - kind, form) - a group of phenotypes within a species or population that is markedly distinct in appearance. Species and populations that have different morphs are called polymorphic.

Morphological character

Cactus grower terms

Characteristic of any plant organ that allows it to be distinguished from others and assigned to a particular group in classification.

Mother (parent) plant ("mother plants")

Cactus grower terms

The term, widely used among collectors, designates mature fruiting plants, or their "stumps", that serve as a source for obtaining cuttings and daughter shoots from which new full-fledged plants are obtained for their subsequent rooting or…

Mutagen

Cactus grower terms

(From mutation and Greek genes - generating) - a physical or chemical factor that increases the frequency of occurrence of mutations.

Mutation

Cactus grower terms

An abrupt, discontinuous, heritable and stable change affecting the characteristics of plants.

Mycoplasmas

Cactus grower terms

Microorganisms possessing characteristics of both bacteria and viruses. They are causal agents of various diseases of plants and animals, including humans.

Native plants

Cactus grower terms

Plants that originated and, in the course of evolution, have continued to inhabit the locality to the present time.

Naturalization of plants

Cactus grower terms

The ability of plants to adapt and reproduce in natural conditions that are new to them.

Necrophages

Cactus grower terms

Organisms that consume the corpses of other organisms.

Necrosis

Cactus grower terms

Death of the tissues of a localized part of an individual while the rest of the organism remains alive (burn, frostbite).

Nectaries

Cactus grower terms

Specific structures in the areoles of certain cacti that produce a sweet liquid attracting insects.

Nematicides

Cactus grower terms

Poisons that kill nematodes.

Nematodes

Cactus grower terms

Parasitic worms.

Neophytes

Cactus grower terms

Plants that have recently appeared in a given locality, newly introduced.

Neotype

Cactus grower terms

A specimen selected to serve as the nomenclatural type until all the material on which the name of the taxon was based has been collected.

Nomenclatural rank

Cactus grower terms

Term referring to the determination of the level in the hierarchy of plant groups during their classification and categorization.

Nomenclature

Cactus grower terms

A universal and stable system of names used in various fields of science and technology, including botany (botanical nomenclature).

Non-chlorophyllous forms

Cactus grower terms

Plants that do not have the green pigment chlorophyll in their cells. Due to the presence of other pigments, their stems (in this case, cacti) are colored in various bright shades of red, orange, yellow and lilac.

Nucellus

Cactus grower terms

(From Latin nucella - nutlet) - the central multicellular part of the ovule, surrounded by coats (integuments).

Nucleotide

Cactus grower terms

An individual structural unit of a nucleic acid, consisting of a phosphate, a five-carbon sugar, and a purine or pyrimidine.

Offset formation

Cactus grower terms

The natural, genetically inherent ability to produce daughter stem shoots (offsets) in a number of cactus species, or induced artificially by removal of the stem's growing point.

Offsets

Cactus grower terms

Lateral shoots of cacti.

Offshoot

Cactus grower terms

A young shoot of a plant arising from the stem or root. Among hobbyists the terms "shoot" or "plantlet" are more commonly used.

Ontogeny (ontogenesis)

Cactus grower terms

Individual development, the entire complex of a plant's life activities and structure, beginning with its origin from a fertilized egg cell, a vegetative bud, or the division of a mother cell, and continuing until the plant's death.

Organic constituents

Cactus grower terms

Complex compounds of the substrate's soil fractions formed as a result of the decomposition of organic substances, for which carbon is an essential element.

Organic matter

Cactus grower terms

A component of soil that is of plant or animal origin.

Osmosis

Cactus grower terms

(From Greek osmos - pressure, push) - the ensemble of physico-chemical processes leading to thermodynamic equilibrium and the equalization of solution concentrations on both sides of a membrane. It is ensured by the slow transfer of low-mo…

Osmotic gradient

Cactus grower terms

Difference in osmotic pressure across a membrane.

Osmotic pressure

Cactus grower terms

Excess external pressure that must be applied to the solution side to stop osmosis — the influx of solvent into it through the semipermeable membrane separating them.