Assertion: Photomodulation of flowering is a | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The Assertion is correct because phytochrome is a photoreceptor pigment that regulates various developmental processes,including flowering,in resp

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The Assertion is correct because phytochrome is a photoreceptor pigment that regulates various developmental processes,including flowering,in response to light.The Reason is also correct. Phytochrome exists in two interconvertible forms: $P_R$ (inactive) and $P_{FR}$ (active). When exposed to red light,$P_R$ is converted to $P_{FR}$. The $P_{FR}$ form is the physiologically active form that migrates to the nucleus or interacts with signaling pathways to induce floral development in shoot buds.Since the active form $P_{FR}$ is the specific component of the phytochrome system that triggers the flowering response,the Reason correctly explains the Assertion.

Assertion: Photomodulation of flowering is a phytochrome regulated process.
Reason: Active form of phytochrome $(P_{FR})$ directly induces floral induction in shoot buds.

Similar Questions

Define the following terms:
$(1)$ Development
$(2)$ Light period

Define/Explain: Photoperiodism.

Write a short note on vernalisation.

$Nicotiana$ $tabacum$,a short-day plant,fails to flower when exposed to a light duration longer than its critical period. Explain.

Some plants require a period of light greater than a critical duration for flowering. Such plants are called $..............$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion: Photomodulation of flowering is a phytochrome regulated process.Reason: Active form of phytochrome $(P_{FR})$ directly induces floral induction in shoot buds.