Home
Class 12
BIOLOGY
What helps in flowering...

What helps in flowering

A

Cytochrome

B

ABA

C

Phytochrome

D

Ethylene

Text Solution

AI Generated Solution

The correct Answer is:
To determine what helps in flowering, we need to analyze the options provided and understand the role of each substance in the flowering process. ### Step-by-Step Solution: 1. **Understanding Cytochrome**: - Cytochromes are proteins involved in energy synthesis, particularly in the formation of ATP (adenosine triphosphate). They play a crucial role in cellular respiration but do not directly induce flowering. - **Conclusion**: Cytochrome does not help in flowering. 2. **Analyzing Abscisic Acid (ABA)**: - ABA is known as a stress hormone. It inhibits plant growth, promotes abscission (the shedding of leaves), and prevents seed germination under stress conditions. - **Conclusion**: ABA is an inhibitory hormone and does not promote flowering. 3. **Examining Phytochrome**: - Phytochromes are pigment proteins that are crucial for the flowering process. They are sensitive to light and exist in two forms: PR (red light-absorbing form) and PFR (far-red light-absorbing form). - When PR absorbs red light (around 660 nm), it converts to PFR. PFR can then absorb far-red light (around 730 nm) and can convert back to PR. - Phytochromes are essential for both short-day plants (SDP) and long-day plants (LDP) to induce flowering. In SDPs, the active form is PR, while in LDPs, it is PFR. - **Conclusion**: Phytochrome is a key factor that helps in flowering. 4. **Considering Ethylene**: - Ethylene is a plant growth regulator primarily involved in the ripening of fruits. While it plays a role in various plant processes, it does not directly induce flowering. - **Conclusion**: Ethylene does not help in flowering. ### Final Answer: The substance that helps in flowering is **Phytochrome**. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

What is the function of vessels in flowering plants?

What is the role of phytochrome in flowering and seed germination?

What we say if a flower has many pistils.

Name the flowering hormone that induces flowering.

What kind of substances are need to be transport in flowering plants?

What is pollen-pistil interaction in flowering plants?

What features of flowers facilitate pollination by birds?

What is essential requirement of long-day plants for flowering?

What will help in protein digestion in stomach ?

What is a flower ? Describe the parts of a typical angiosperm flower.