What are elicitors give examples?

Asked by: Mrs. Ashlynn Braun
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Commonly tested chemical elicitors are salicylic acid, methyl salicylate, benzothiadiazole, benzoic acid, chitosan, and so forth which affect production of phenolic compounds and activation of various defense-related enzymes in plants.

What are elicitors in botany?

Elicitors are pathogen signal metabolites, recognized by plant cells, which trigger plant defenses. They are produced either by the pathogen or by plant cell components, such as cell wall, upon hydrolyzing action of the pathogen.

What are exogenous elicitors?

ABSTRACT. Elicitors are compounds stimulating any type of plant defense. This broader definition of elicitors includes both substances of pathogen origin (exogenous elicitors and compounds released from plants by the action of the pathogen (endogenous elicitors).

What are biotic elicitors?

Biotic elicitors are the substances of biological origin that include polysaccharides originated from plant cell walls (e.g. chitin, pectin, and cellulose) and micro–organisms.

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What are elicitors in microbiology?

Abstract Elicitors are molecules that stimulate any of a number of defense responses in plants. Research over the past decade has focused on the mechanisms by which plant cells perceive and transduce these biological signals to activate defense responses.

What is elicitors in plant pathology?

Elicitors in plant biology are extrinsic or foreign molecules often associated with plant pests, diseases or synergistic organisms. ... This response results in the enhanced synthesis of metabolites which reduce damage and increase resistance to pest, disease or environmental stress.

What do elicitors do?

Elicitors act as signal compounds at low concentrations, providing information for the plant to trigger defense, distinguishing elicitors from toxins, which may act only at higher concentrations and/or affect the plant detrimentally without active plant metabolism [62].

What is the meaning of Phytoalexins?

: any of various antimicrobial chemical substances produced by plants to combat infection by a pathogen (such as a fungus)

What are PR genes?

Pathogenesis-related (PR) proteins are proteins produced in plants in the event of a pathogen attack. They are induced as part of systemic acquired resistance. Infections activate genes that produce PR proteins. Some of these proteins are antimicrobial, attacking molecules in the cell wall of a bacterium or fungus.

Who is the father of tissue culture?

Have you heard of the Father of Tissue Culture? In 1907, Ross Granville Harrison, an American zoologist, was able to culture the nerve cells from a frog in solidified lymph. Because of his contributions to the tissue culture method, Harrison now has the title of Father.

How secondary metabolites are produced?

Secondary metabolites are produced by microorganisms when one or more of the nutrients in the culture medium is depleted. Secondary metabolites usually have an important ecological function and serve diverse survival functions in nature.

What is SAR in plants?

Systemic acquired resistance (SAR) is one such SA-dependent response. SAR is a long distance signaling mechanism that provides broad spectrum and long-lasting resistance to secondary infections throughout the plant. This unique feature makes SAR a highly desirable trait in crop production.

What is Elicitor in psychology?

Facial emotional expressions can serve both as emotional stimuli and as communicative signals. ... As an emotion elicitor, a facial emotional expression (e.g., a disgusted face) activates a response that is similar to responses to other emotional stimuli of the same valence (e.g., a dirty, nonflushed toilet).

Is Elicitor a word?

A person or thing that elicits.

Which is endogenous type of Elicitor?

Elicitor-induced production of secondary metabolites: Elicitors are the compounds like pectin, pectic acid, (endogenous elicitors produced by plant cells) chitin, chitosan, (exogenous elicitors produced by a microorganism), ethylene, fungicides, antibiotics (abiotic elicitors chemical agents) and cold, heat UV light ( ...

How are phytoalexins created?

Phytoalexins are produced by healthy cells adjacent to localized damaged and necrotic cells in response to materials diffusing from the damaged cells. Phytoalexins are not produced during compatible biotrophic infections. Phytoalexins accumulate around both resistant and susceptible necrotic tissues.

How do phytoalexins work?

Phytoalexins are low molecular weight antimicrobial compounds that are produced by plants as a response to biotic and abiotic stresses. As such they take part in an intricate defense system which enables plants to control invading microorganisms.

Who discovered phytoalexins?

The concept of phytoalexins was first introduced over 70 years ago by Müller and Börger [3] after observing that infection of potato tubers with a strain of Phytophthora infestans capable of initiating hypersensitive reactions, significantly inhibited the effect of a subsequent infection with another strain of P.

Is salicylic acid an Elicitor?

Salicylic acid (SA) is an effective elicitor to increase taxol production in Pestalotiopsis microspora. ... This oxidative process stimulates isoprene biosynthetic pathway by triggering expression of the geranylgeranyl pyrophosphate synthase gene leading to improved biosynthesis of taxol in P.

What is hypersensitive response in plants?

Hypersensitive response (HR) is a mechanism used by plants to prevent the spread of infection by microbial pathogens. HR is characterized by the rapid death of cells in the local region surrounding an infection and it serves to restrict the growth and spread of pathogens to other parts of the plant.

What is used as solidifying agent in tissue culture?

Agar is a polysaccharide obtained from seaweeds and is most commonly used as a solidifying agent in plant tissue culture media. Some growers use Phytagel in place of Agar as the gelling medium in a tissue culture operation.

Which of the following is best suited method for production of virus free plants?

There is no effective chemical control method against viruses directly. For this reason, the most common method for obtaining virus-free plant is meristem culture technique.

Which of the following favors the root formation?

Auxin favors root formation, and cytokinin favors the growth of the shoot.

How will you differentiate between plant cell and microbial cells?

The plant cell is a eukaryotic cell whereas the bacterial cell is a prokaryotic cell. The main difference between plant cell and bacterial cell is that plant cell contains membrane-bound organelles whereas bacterial cell lacks membrane-bound organelles. ... The DNA of the plant cell is arranged in the nucleus.