Greenhouse
It is a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions or it can relate to the greenhouse effect
Glossary of greenhouse[edit | edit source]
- agronomists – specialists in soil and crop sciences
- amendment – any material, such as peat moss, processed bark, and sand, added to a growing medium to improve its ability to support plant growth
- auxiliary bud – the bud that forms in the angle that the leaf makes with the main stem
- bagasse - the plant residue from sugarcane left after the juice has been extracted; used as a nonwood fiber
- binomial nomenclature – a two-part name
- botanists – scientists who study plants
- bulb – any underground stem consisting of layers of fleshy scales that overlap each other
- capillary action – the movement of water through a growing medium because of the adhesion of water molecules to the medium
- cation-exchange capacity – the ability of the growing medium to attract and hold nutrients
- cellular respiration – the controlled breaking down of glucose that releases energy for plant growth, absorption, translocation, and other metabolic processes
- coldframe – an unheated outdoor growing structure covered with a transparent glazing material
- complete fertilizer – a fertilizer containing nitrogen, phosphorus, and potassium
- condensation – moisture colder than air that is on leaves
- corm – a specialized stem that is a solid, fleshy, scale-covered enlargement
- creeper stems - vines that grow on the ground without additional support
- cultivar – a subcategory within a species that is developed by botanists and agronomists, (not occurring in the wild); usually capitalized and written with single quotation marks or it precedes the species’ name and is abbreviated as ‘cv’
- cuttings – a method of vegetative propagation in which plant pieces are “cut” from the parent plant and rooted to form new plants
- day-neutral plant – a species that flowers regardless of the light/dark ratio
- dolomitic limestone – limestone with a high magnesium content
- dormancy – the resting stage of seeds
- enzymes – large, complex proteins that activate chemical reactions within cells
- epigeous germination – growing aboveground
- evapotranspiration – the combined loss of moisture from evaporation and transpiration
- fertigation – applying fertilizer through an irrigation system
- floriculture – a specialty of horticulture that deals with producing, cultivating, and managing ornamental plants and flowers
- fungicide – chemical pesticide directed at fungi
- growing medium – a material used for growing plants; may contain peat moss, sand, perlite, soil, or other ingredients (plural: growing media)
- herbicide – a chemical pesticide directed at weeds
- horticulture – the cultivation, processing, and sale of fruits, nuts, vegetable, ornamental plants, and flowers
- hotbed – an outdoor growing structure similar to a coldframe but heated by a source besides the sun
- hydroponics – growing plants in a nutrient solution, not soil
- hypogeus germination – growing underground
- imperfect flower – flower that contains male or female parts, not both
- incomplete flower – flower missing one or more of the main parts of the flower: sepals, petals, stamens, or pistils
- infiltration – the rate of water absorption into the roots through the pores
- infrared – wavelengths longer than red light
- insecticide – chemical pesticide directed at insects
- internodes – parts of the stem or other plant parts that are located between two nodes (regions of the stem where one or more leaves are attached)
- landscape horticulture – raising ornamentals for outside use
- layering – a vegetative method of propagating plants by rooting a new plant while the stem is still attached to the parent plant
- leaching – washing important nutrients from the soil
- long-day plant – a species that flowers only in a day length of critical duration
- macronutrient – one of six essential elements needed in relatively large amounts for plant growth: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur
- meristem tissue – tissues that actively divide to form new growth
- micronutrient – one of eight essential nutrients needed in tiny quantities for plant growth: iron, copper, zinc, boron, molybdenum, chlorine, manganese, and cobalt
- nematodes – tiny round worms that attack plant roots
- nodes - swollen areas at the joints of stems where buds and leaves originate
- osmosis – the movement of water across a semipermeable membrane from a higher concentration to a lower concentration
- ozones – compounds found above the Earth’s surface that filter out harmful ultraviolet rays
- pasteurization – a process that kills harmful organisms and preserves beneficial organisms
- perfect flower – a flower that has both male and female parts
- permeability – the ability to transport water into the plant
- pesticide – a chemical used to control an undesirable organism
- petiole – the stem of a leaf
- pH – a measurement of the level of alkalinity/acidity
- phloem – part of the vascular system that transports carbohydrates from the photosynthesizing cells to the rest of the plant
- photoperiod – the light/dark ratio in a day
- photoperiodism – the influence of day length vs. night length on plant growth
- photosynthesis – process by which green, living plants convert carbon dioxide and water to simple sugar in the presence of light
- phototropism – a plant’s bending toward the source of light
- phytotoxic – poisonous to plants
- pinching – removing the terminal bud of a plant to promote branching
- plumule – first shoot of a developing plant; also known as the coleoptile
- porosity – the pore space (tiny openings) between solid particles
- propagation – plant reproduction by sexual or vegetative methods
- propagation bed – a special location within the greenhouse that is used to allow cuttings to root
- quality of light – the spectrum of color (wavelength) that is measured in nanometers
- rhizome – an underground stem that produces roots on the lower surface and extends leaves and flowering shoots above the ground
- scarification - scratching or modifying the seed coat in order to increase water absorption
- scion – unrooted, upper part of plant used for grafting
- seed dormancy – resting stage of the seed that prevents the seed from germinating until environmental conditions are favorable
- seed germination – a process in which a seed changes into a developing seedling
- short-day plant – a species that flowers only in a daily dark period of critical duration
- stolon – a stem that grows horizontally above the soil surface
- stomata – specialized pores in the epidermis of the leaf used to exchange gas
- stratification – a rest period for seeds before germination can occur; seeds are placed in moist growing medium at 32-50 oF for a certain period of time
- succulents – plants with thick, fleshy leaves that store water, e.g., cacti and jade plants
- taxonomy – the science of identifying, naming, and classifying plants
- topography – the shape of the land, e.g., hilly, flat, steep, rocky
- translocation – the movement of minerals, water, carbohydrates, and other materials within the vascular system of a plant
- transpiration – the loss of water by evaporation primarily from the leaf surface through specialized pores called “stomata”
- tuber – a short, thick underground stem that serves primarily as a food storage area
- ultraviolet – wavelengths shorter than violet light
- vascular system – the system that moves carbohydrates, water, and minerals throughout the plant; includes xylem and phloem cells
- viability – the ability of seeds to germinate
- water-holding capacity – the ability of a growing medium to retain water
- xeromorphic foliage – leaves adapted for plants that grow in arid conditions
- xylem – part of the vascular system that transports water and minerals upward from the roots to the photosynthesizing cells
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