Dictionary » P » Phytoalexin



noun, plural: phytoalexins

Any of the chemicals produced de novo by plants in order to counter pathogens and pests


Phytoalexins refer to different chemicals involved in plant immune defense mechanism. Plants produce phytoalexins to combat plant pathogens and pests. Examples include terpenoids, alkaloids, and glycosteroids. These chemicals accumulate immediately in areas where there is 'stress', such as those caused by infections, diseases, and parasitism. Some of these chemicals have antimicrobial properties, such as the ability to disrupt the cell wall or the metabolism of an invading microorganism.

Word origin: Greek phuton (plant) + Greek alexein (to ward off)

Mentioned in:

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

The Fiber Disease

... plants or elicitation of cell cultures initiates substantial metabolic changes directed at the induction of defence reactions. The antimicrobial phytoalexins deserve special attention because they represent one essential component of plant resistance. The great structural diversity of phytoalexins ...

See entire post
by London
Sun Oct 01, 2006 8:50 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 6245080

it's by Mycotine or Virus?

... th upper one..the upper one just get curlied but no chlorocys were spotted. After reading and reading I found that plants use substances named Phytoalexin and PR (Pathogenic-Related) protein to supress the virus and depositioning the lignin. @Andrew Still remember plant hormone named Brassinolide ...

See entire post
by victor
Mon Oct 17, 2005 12:26 pm
Forum: Botany Discussion
Topic: it's by Mycotine or Virus?
Replies: 16
Views: 7254

This page was last modified 11:43, 12 August 2013. This page has been accessed 1,892 times. 
What links here | Related changes | Permanent link