Greenhouse

From WikiMD

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

  • 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
  • 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
  • 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
  • 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
  • enzymes – large, complex proteins that activate chemical reactions within cells
  • 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
  • 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
  • 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)
  • 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
  • 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
  • permeability – the ability to transport water into the plant
  • pesticide – a chemical used to control an undesirable organism
  • 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
  • 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
  • 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
  • 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
  • xylem – part of the vascular system that transports water and minerals upward from the roots to the photosynthesizing cells
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