Question
Download Solution PDFSecondary metabolites, with strong antimicrobial activity, that are synthesized following infection and accumulate at the site of infection are called
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Phytoalexins
Concept:
- Phytoalexins are secondary metabolites produced by plants in response to pathogen attacks.
- These compounds exhibit strong antimicrobial activity and accumulate at the site of infection to inhibit the growth of the invading pathogens.
- Phytoalexins play a crucial role in the plant's defense mechanism by providing a rapid and localized response to infection.
Explanation:
- Phytochelatins: These are small, cysteine-rich peptides that chelate heavy metals and are involved in the detoxification of metal ions in plants. They do not have antimicrobial properties and are not synthesized in response to pathogen infection.
- Phytochrome: Phytochromes are photoreceptor proteins in plants that regulate various aspects of growth and development in response to light conditions. They are not related to antimicrobial activity or pathogen response.
- Phytoalexins: These are antimicrobial substances synthesized by plants in response to pathogen attack. They accumulate at the site of infection and help in inhibiting the growth and spread of the pathogen. Examples include resveratrol in grapes and camalexin in Arabidopsis.
- Phytin: Also known as phytic acid, this compound is a storage form of phosphorus in plants, particularly in seeds. It is not involved in antimicrobial activity or pathogen response.
Last updated on May 30, 2025
-> The HPSC Assistant Professor Result has been announced for the screening test of Assistant Professor Botany and Zoology posts.
-> The HPSC Assistant Professor Subject Knowledge Test is scheduled on various days between 25th April to 31st August 2025, and the Screening Test will be conducted between 27th April to 29th June 2025.
-> The Skill Test (Fine Arts & Music) was conducted from 4th to 12th April 2025.
-> HPSC Assistant Professor Notification (2024) was released for 2424 vacancies.
-> The commission has decided to conduct the Exams through a Screening Test followed by a Subject Knowledge Test (87.5% weightage) and Interview (12.5 % weightage).
-> Candidates who have completed their Post Graduation are eligible to apply for the post.
-> After getting a successful selection, the candidates will receive a decent salary range between Rs. 57,700 - Rs. 1,82,400.