Adventitious: Coming from an external source or occurring in an unusual place or manner. Not inherent, inherited or innate but rather occurring accidentally or spontaneously.
How do you use adventitious in a sentence?
Adventitious in a Sentence
- The weird-looking plant is adventitious and not native to this country.
- While the band was not popular in its native country, it did find adventitious celebrity in other countries.
What is the example of adventitious?
The definition of adventitious is something added from outside or something that occurs by chance or accident. An example of adventitious is accidentally stumbling upon a cure for a disease while researching the components of a newly discovered plant.
What is the meaning of adventitious root?
: a root that arises from any point other than the radicle or the root axis (as the prop roots of corn arising from the lower stem) compare aerial root.
What is adventitious lung sounds?
Adventitious sounds refer to sounds that are heard in addition to the expected breath sounds mentioned above. The most commonly heard adventitious sounds include crackles, rhonchi, and wheezes.
What are pulmonary rales?
Rales. Small clicking, bubbling, or rattling sounds in the lungs. They are heard when a person breathes in (inhales). They are believed to occur when air opens closed air spaces.
What is adventitious in biology?
noun, plural: advemtitious roots. A root growing on the stem, leaf, or other body parts apart from the usual the basal root system of the plant, particularly the radicle or root branches.
What is the definition of unpremeditated?
: not characterized by willful intent and forethought : not planned in advance : not premeditated unpremeditated murder.
What is adventitious shoot?
Adventitious shoot is a kind of shoot not formed in its main location (at the end of stem and node); for example, it is formed in the internodal part of explants or other parts. The reason for adventitious shoot formation is dedifferentiation and redifferentiation of some cells.
What does the term adventitious mean?
1 : coming from another source and not inherent or innate a Federal house without adventitious later additions adventitious influences. 2 : arising or occurring sporadically or in other than the usual location adventitious roots.
What plants have adventitious buds?
Shoots that develop from adventitious buds on roots are termed suckers. They are a type of natural vegetative reproduction in many species, e.g. many grasses, quaking aspen and Canada thistle. The Pando quaking aspen grew from one trunk to 47,000 trunks via adventitious bud formation on a single root system.
What is adventitious root with example?
Adventitious roots include those formed on stem and leaf cuttings and those produced by air layering. Adventitious aerial roots of many tropical trees are common. For example, Ficus produces free-hanging aerial roots that originate in the branches and undergo secondary thickening before they reach the soil.
What are adventitious organs?
in plants, an organ, such as a bud or root, that arises at sites where it ordinarily does not develop. For example, adventitious buds often arise not in the axils of leaves or at the stem apex, as usual, but on internodes, roots, or leaves. Such organs have great biological significance. …
What are adventitious roots Class 11?
Hint: The roots that do not arise from the organ of the plant root are called adventitious roots. They mainly arise from the stem, leaf. They propagate vegetatively. The life of the adventitious roots is short. They are shallow and can grow either underground or serial.
Why is it called adventitious roots?
Post-embryonic roots can develop from stems, leaves or other vegetative non-root organs, either constitutively or in response to stress. Such roots are referred to as adventitious, a term that etymologically indicates their unusual and surprising origin (Figure 1) .
What causes adventitious breath sounds?
The pleura are protective, cushioning layers of tissue. They cover the outside of the lungs and the inside of the chest wall. If the pleura become inflamed, they can rub against each other, causing an adventitious breath sound. Rubs are typically louder than the other sounds because it occurs on the chest wall.
Where do you hear adventitious breath sounds?
The sound quality is considered a harsh grating or creaking. Potential causes include tuberculosis and pneumonia. It is best heard in the lower anterior lungs and lateral chest, during both inspiration and expiration.
Are adventitious breath sounds normal?
The presence of adventitious lung sounds often indicates a pulmonary disorder, although they can also be present in healthy people.
Why do I hear crackling in my throat when I breathe?
Crackles occur if the small air sacs in the lungs fill with fluid and there’s any air movement in the sacs, such as when you’re breathing. The air sacs fill with fluid when a person has pneumonia or heart failure. Wheezing occurs when the bronchial tubes become inflamed and narrowed.
What are Crepitation sounds?
Crepitation refers to situations where noises are produced by the rubbing of parts one against the other, as in: Crepitus, a crunching sensation felt in certain medical problems. Rales or crackles, abnormal sounds heard over the lungs with a stethoscope. A mechanism of sound production in grasshoppers during flight.
What is Bibasilar?
Bibasilar crackles are a bubbling or crackling sound originating from the base of the lungs. They may occur when the lungs inflate or deflate. They’re usually brief, and may be described as sounding wet or dry. Excess fluid in the airways causes these sounds.
What is adventitious root short answer?
Adventitious roots are plant roots that form from any nonroot tissue and are produced both during normal development (crown roots on cereals and nodal roots on strawberry [Fragaria spp.]) and in response to stress conditions, such as flooding, nutrient deprivation, and wounding.
What is the meaning of biennially?
1 : occurring every two years a biennial celebration. 2 : continuing or lasting for two years specifically, of a plant : growing vegetatively during the first year and fruiting and dying during the second Biennial herbs flower in their second year.
What are Epiphyllous buds?
Epiphyllous bud is a type of adventitious bud, i.e, not originating from stem apex or axil of a leaf. Usually it develops from margin (or leaf surface) of leaf as in Bryophytlum, Kalanchoe etc. It serves the function of vegetative propagation.
What’s 3rd degree murders?
Third-degree murder falls between manslaughter and second-degree murder charges. This murder is not based on having the intent to kill. Third-degree murder is often charged as a depraved heart or mind crime. This charge can arise when a person fires a gun in a crowd without intending to kill anyone, for example.
What does Unprompt mean?
English Language Learners Definition of unprompted : done or said by someone who has not been asked or reminded to do or say anything.
What does the word Extemporary mean?
Spoken, done, or composed with little or no preparation or forethought. An extemporary lecture.
What is adventitious shoot regeneration?
Adventitious shoots regeneration of plants is affected by internal signals and external conditions. There were many factors that affect regeneration, including plant growth regulators, the duration of dark culture, different genotypes, and basal medium components.
Does ethylene promote root hair formation?
Root hairs are an extensive structure of root epidermal cells and are critical for nutrient acquisition, soil anchorage, and environmental interactions in sessile plants. The phytohormone ethylene (ET) promotes root hair growth and also mediates the effects of different signals that stimulate hair cell development.
What do you mean Embryoids write its application?
Somatic embryogenesis is the formation of embryos from the callus tissue directly and these embryos are called Embryoids or from the in vitro cells directly form pre-embryonic cells which differentiate into embryoids.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.