Savannas
Cactus grower terms
Predominantly flat areas with a predominance of red-brown soils. Herbaceous cover predominates in combination with individual trees or groups of trees.
Glossary of terms
A reference section with categories and short explanations.
Scale insect
Cactus grower terms
Insect pest.
Scarification
Cactus grower terms
Damage to the seed testa (seed coat) to increase their ability to germinate. It is carried out mechanically or by treatment with concentrated sulfuric acid followed by thorough rinsing with water.
Schizocotyly
Cactus grower terms
"False pleiocotyly" - the phenomenon of the original cotyledons splitting into two, less often three, lobes or segments. At the same time, as a rule, the pattern of vascular connections characteristic of a dicotyledonous embryo can be trac…
Sciarids
Cactus grower terms
Pest insects whose larvae primarily damage the roots of seedlings.
Scions
Cactus grower terms
Plants that are grafted.
Sclerophytes
Cactus grower terms
Plants adapted to living in dry conditions without storing large amounts of water.
Seed
Cactus grower terms
Embryonic stage of seed plants.
Seed activation
Cactus grower terms
Treatment of seeds before sowing.
Seed coat
Cactus grower terms
Protective covering, testa.
Seed exchange list
Cactus grower terms
The exchange collection of botanical gardens.
Seed germination
Cactus grower terms
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.
Seed germination (radicle emergence)
Cactus grower terms
See seed germination.
Seed germination rate
Cactus grower terms
The potential ability of seeds to germinate, expressed as the percentage of seeds that have germinated in relation to the number sown.
Seed stimulation
Cactus grower terms
Method of activating the vital activity of seed cells
Seed stratification
Cactus grower terms
Artificial partial or complete breaking of seed dormancy by exposing seeds to low (down to 2 °C) temperatures in moist peat, sand, perlite and other materials, or by brief freezing after soaking them in water.
Seedlings
Cactus grower terms
Young plants that are morphologically distinguished from juveniles by the presence of cotyledons and the absence of developed above-ground organs.
Seedlings
Cactus grower terms
Young plants that have developed from seeds.
Selection
Cactus grower terms
Selection and propagation of individuals possessing some desirable trait.
Self-pollination
Cactus grower terms
Pollination in which the stigma is pollinated by the pollen of the same flower or of another flower of the same plant, or the ability of pollen to fertilize the egg cells of its own flower; the highest degree of self-pollination is cleisto…
Self-sterility
Cactus grower terms
Inability of pollen to fertilize the egg cells of its own flower.
Sessile flowers
Cactus grower terms
Without or with a very short pedicel.
Shading
Cactus grower terms
Actions aimed at reducing the illumination of plants in order to prevent adverse effects of sunlight on the plant.
Shoot
Cactus grower terms
Axial organ of higher plants with apical growth; in scientific terms a broader concept than stem or trunk, although among hobbyists it refers to daughter lateral offshoots on mature cactus specimens or their stumps.
Shoot branching
Cactus grower terms
The development of several shoots connected to one another from a single original shoot as a result of the development of apical and lateral buds (growth points).
Shriveling of seeds
Cactus grower terms
Deformation of seeds due to their incomplete development, which may be associated with a sharp decrease in moisture during the ripening period.
Soil impedance
Cactus grower terms
Total electrical resistance.
Soil microorganisms
Cactus grower terms
Very small, mostly unicellular organisms visible only under a microscope: bacteria, fungi, algae, etc., belonging to various taxonomic groups.
Soil porosity
Cactus grower terms
Presence of pores in the soil that provide its permeability to water and aeration of the plant root system.
Soil porosity
Cactus grower terms
The total volume of all pores or spaces between soil particles, caused by their heterogeneity and, consequently, their low tendency to stick together.
Soil sterilization
Cactus grower terms
Complete destruction of microorganisms, both harmful and beneficial, by steaming the soil in an autoclave or by other methods, bringing the temperature to the boiling point of water.
Soil-forming organisms
Cactus grower terms
The assemblage of organisms involved in soil formation.
Species aggregation
Cactus grower terms
The pattern of distribution of individuals of a species in nature: isolated from one another, in small groups, as separate populations distant from each other and, finally, in large groups, clumps, patches and thickets.
Species habitat
Cactus grower terms
The area of distribution with the conditions necessary for life.
Sporadic
Cactus grower terms
(From Greek sporadikos - single) - appearing from time to time.
Stagnation
Cactus grower terms
(From Latin stagnum - standing water) a state of arrested plant growth, the transition from active life processes to forced dormancy, a temporary cessation of growth under unfavorable conditions.
Stamens
Cactus grower terms
A component of a flower's structure; includes the filament and the anthers.
Stem mealybug
Cactus grower terms
An insect pest that parasitizes the stems of succulents.
Stem segments
Cactus grower terms
Parts of cacti that exhibit segmented growth.
Suberization
Cactus grower terms
Change in the walls of plant cells due to the deposition of lipid-like substances in them, which leads to the formation of hard tissues that worsen the appearance of plants but serve as protection against excessive transpiration, penetrati…