Population
Термины кактусовода
A noticeable number of individuals of a single species, freely interbreeding with one another, occurring within a defined territory and separated from similar aggregations.
Glossary of terms
A reference section with categories and short explanations.
Soil porosity
Термины кактусовода
Presence of pores in the soil that provide its permeability to water and aeration of the plant root system.
Soil porosity
Термины кактусовода
The total volume of all pores or spaces between soil particles, caused by their heterogeneity and, consequently, their low tendency to stick together.
Soil-forming organisms
Термины кактусовода
The assemblage of organisms involved in soil formation.
Bud
Термины кактусовода
An embryonic shoot consisting of a rudimentary stem with an apical meristem (growth cone) and a floral primordium. Buds are classified as floral (fruit) and vegetative (stem) buds.
Prefloral tissue
Термины кактусовода
We were unable to find this term in the available domestic and foreign literature. Botanists at the Main Botanical Garden of the Russian Academy of Sciences were also unable to explain its meaning.
Grafting
Термины кактусовода
A horticultural technique that involves joining the scion and the rootstock, resulting in accelerated growth of the scion or simplifying its care.
Scions
Термины кактусовода
Plants that are grafted.
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".
Shading
Термины кактусовода
Actions aimed at reducing the illumination of plants in order to prevent adverse effects of sunlight on the plant.
Introduced plants
Термины кактусовода
Plants introduced into the local flora by humans or by other means, but not firmly established in it.
Vascular bundle
Термины кактусовода
A system of several types of tissues interconnected with one another that perform the function of conducting water and nutrients through the plant, in other words — the assemblage of conductive, mechanical, meristematic, and parenchymatous…
Derived seeds
Термины кактусовода
Seeds obtained outside the plant's native range.
Seed germination (radicle emergence)
Термины кактусовода
See seed germination.
Proliferation (prolification)
Термины кактусовода
The formation of a plant organ from another organ whose development has ended. For example, the sprouting of a flower or fruit, resulting in the appearance on them of a shoot, a new fruit, or a flower.
Seed germination
Термины кактусовода
The transition of seeds from a state of dormancy to active development, which begins with swelling of the seed, rupture of the testa and the emergence of the root.
Germination
Термины кактусовода
A set of technological measures that facilitate the germination of seeds during sowing.
Germinated seeds
Термины кактусовода
Seeds in which the embryonic root (radicle) has appeared, but the embryonic stem (the subcotyledonary swelling or hypocotyl) has not yet developed.
Prototype
Термины кактусовода
Presumed ancestral (mother, progenitor) form from which the other species of this group may have originated.
Erect stem
Термины кактусовода
Standing perpendicular to the substrate.
Psammophytes
Термины кактусовода
Plants adapted to living in sandy habitats, able to resist being blown away and being buried.
Pseudocephalium
Термины кактусовода
A specific formation on the lateral surface of stems in their upper part, forming a dense pubescence of areoles. It differs from a true cephalium in that the ribs are not modified and the areoles do not become closely spaced.
Pulp
Термины кактусовода
The flesh of a juicy fruit.
Variety
Термины кактусовода
A taxonomic unit accepted in botany, referring to a group of individuals of a single species that have stable morphological deviations from the "typical" species, which are of minor importance. It occupies a position between subspecies and…
Nomenclatural rank
Термины кактусовода
Term referring to the determination of the level in the hierarchy of plant groups during their classification and categorization.
Rarity
Термины кактусовода
Rarity, a rare specimen; an exceptionally rare plant both in terms of being held in collections and of occurring in natural conditions.
Vegetation
Термины кактусовода
The assemblage of plant communities (phytocoenoses) of the planet or its parts.
Regeneration
Термины кактусовода
Restoration by a living organism of lost body parts.
Reduction
Термины кактусовода
Decrease in size of plant organs or tissues.
Radish-like roots
Термины кактусовода
(Not napiform) thickening of the taproot.
Relict plants
Термины кактусовода
Dying out; surviving in small numbers.
Replantation
Термины кактусовода
Engraftment (survival) of a detached organ.
DNA replication
Термины кактусовода
(From Latin replicatio - repetition) - the process of self-replication of macromolecules of nucleic acids before cell division, ensuring the accurate copying of genetic information.
Plant reproduction
Термины кактусовода
Reproduction of individuals through the process of propagation.
Receptaculum
Термины кактусовода
(Lat. term receptaculum - receptacle - the axis of the flower on which the sepals, petals, stamens, carpels are arranged) - a term used by many cactologists to denote the receptacle specific to all higher cacti.
Recessive
Термины кактусовода
(From Latin recessus - retreat, removal) - an allele whose phenotypic expression in the heterozygote is masked by the dominant allele.
Reciprocal crosses
Термины кактусовода
(From Latin reciprocus - mutual) - two crosses characterized by a mutually opposite combination of the trait under study and the sex of the forms participating in these crosses.
Rhizoctoniosis
Термины кактусовода
Fungal disease of cacti.