Magnesium deficiency
Термины кактусовода
A diseased condition of a plant caused by a shortage of magnesium in the soil.
Glossary of terms
A reference section with categories and short explanations.
Mother (parent) plant ("mother plants")
Термины кактусовода
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…
Mesophytes
Термины кактусовода
(From Greek metos - middle, intermediate and phyton - plant) plants that live in conditions of more or less sufficient, but not excessive, moisture (an intermediate position between xerophytes and hygrophytes).
Meiosis
Термины кактусовода
(From Greek meiosis - diminution) - a special type of cell division that results in a reduction (decrease) in the number of chromosomes and the transition of the cell from the diploid state to the haploid state.
Meristem
Термины кактусовода
Formative plant tissue capable of cell division and producing new cells that ensure additional growth. Distinctions are made between the primary meristem in the region of the shoot apex or root tips, the secondary meristem located in the c…
Mechanism of negative phototropism
Термины кактусовода
The ability of a plant or its parts to grow in a direction opposite to that of the sun's rays, i.e., to grow into the "dark".
Mycoplasmas
Термины кактусовода
Microorganisms possessing characteristics of both bacteria and viruses. They are causal agents of various diseases of plants and animals, including humans.
Micropyle
Термины кактусовода
(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.
Micropropagation [micropropagation, cloning]
Термины кактусовода
A method of vegetative propagation by culturing isolated tissues or cells in artificial media.
Microflora
Термины кактусовода
The community of microorganisms present in the soil.
Mimicry
Термины кактусовода
Resemblance of particular plant organs to various objects of the surrounding environment.
Mineral constituents
Термины кактусовода
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.
Modifications
Термины кактусовода
Changes in an organism's phenotype not associated with changes in its genotype.
Monoculture
Термины кактусовода
Cultivation of a single plant species.
Monotypic genus
Термины кактусовода
A genus represented by only one species.
Monstrose form
Термины кактусовода
A growth anomaly that leads to the formation of peculiar ("deformed") specimens consisting of many unevenly growing shoots.
Morph
Термины кактусовода
(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
Термины кактусовода
Characteristic of any plant organ that allows it to be distinguished from others and assigned to a particular group in classification.
Mutagen
Термины кактусовода
(From mutation and Greek genes - generating) - a physical or chemical factor that increases the frequency of occurrence of mutations.
Mutation
Термины кактусовода
An abrupt, discontinuous, heritable and stable change affecting the characteristics of plants.
Matting
Термины кактусовода
Entangling, sticking together, clumping of the pubescence of areoles under the action of water that has fallen on them.
Method of propagation
Термины кактусовода
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.
Mineral substrate
Термины кактусовода
Substrate that does not contain organic components (organic matter).