Definition of phytoalexin in English:

phytoalexin

noun ˌfʌɪtəʊəˈlɛksɪnˌfīdōəˈleksən

Botany

A substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite.
Example sentencesExamples
- These compounds represent the major forms of phytoalexins in grape.
- Plants produce phytoalexins as an immune response to physical, chemical, or biological damage.
- Plant resistance to specific pathogens is often correlated with increased production of phytoalexins, whereas inhibition or deficiency of phytoalexin production allows greater virulence.
- Tryptophan is used in some plant species as a precursor to bioactive alkaloids and defence phytoalexins, as well as the phytohormone auxin.
- During infection by fungal pathogens, plant cells respond by expressing a battery of disease response genes, which can result in the production of various toxic plant products, including active oxygen species and phytoalexins.

Origin

1940s: from phyto- 'of plants' + alexin, a name for a class of substances found in blood serum, able to destroy bacteria.

Definition of phytoalexin in US English:

phytoalexin

nounˌfīdōəˈleksən

Botany

A substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite.
Example sentencesExamples
- Plants produce phytoalexins as an immune response to physical, chemical, or biological damage.
- During infection by fungal pathogens, plant cells respond by expressing a battery of disease response genes, which can result in the production of various toxic plant products, including active oxygen species and phytoalexins.
- These compounds represent the major forms of phytoalexins in grape.
- Tryptophan is used in some plant species as a precursor to bioactive alkaloids and defence phytoalexins, as well as the phytohormone auxin.
- Plant resistance to specific pathogens is often correlated with increased production of phytoalexins, whereas inhibition or deficiency of phytoalexin production allows greater virulence.

Origin

1940s: from phyto- ‘of plants’ + alexin, a name for a class of substances found in blood serum, able to destroy bacteria.

单词	phytoalexin
释义	Definition of phytoalexin in English: phytoalexin noun ˌfʌɪtəʊəˈlɛksɪnˌfīdōəˈleksən Botany A substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite. Example sentencesExamples These compounds represent the major forms of phytoalexins in grape. Plants produce phytoalexins as an immune response to physical, chemical, or biological damage. Plant resistance to specific pathogens is often correlated with increased production of phytoalexins, whereas inhibition or deficiency of phytoalexin production allows greater virulence. Tryptophan is used in some plant species as a precursor to bioactive alkaloids and defence phytoalexins, as well as the phytohormone auxin. During infection by fungal pathogens, plant cells respond by expressing a battery of disease response genes, which can result in the production of various toxic plant products, including active oxygen species and phytoalexins. Origin 1940s: from phyto- 'of plants' + alexin, a name for a class of substances found in blood serum, able to destroy bacteria. Definition of phytoalexin in US English: phytoalexin nounˌfīdōəˈleksən Botany A substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite. Example sentencesExamples Plants produce phytoalexins as an immune response to physical, chemical, or biological damage. During infection by fungal pathogens, plant cells respond by expressing a battery of disease response genes, which can result in the production of various toxic plant products, including active oxygen species and phytoalexins. These compounds represent the major forms of phytoalexins in grape. Tryptophan is used in some plant species as a precursor to bioactive alkaloids and defence phytoalexins, as well as the phytohormone auxin. Plant resistance to specific pathogens is often correlated with increased production of phytoalexins, whereas inhibition or deficiency of phytoalexin production allows greater virulence. Origin 1940s: from phyto- ‘of plants’ + alexin, a name for a class of substances found in blood serum, able to destroy bacteria.
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