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Which hormones promote the flowering in long day plants and also control sex expression in certain species?
Options
(a) ethylene
(b) gibberellin
(c) cytokinins
(d) auxin
Correct Answer:
gibberellin
Explanation:
Gibberelins are growth promoting phytohormones. Some of plant species flower only if the light period exceeds a critical length, and others flower only if this period is shorter than some critical length. Gibberelins can substitute for the long-day requirement in some species, showing an interaction with light. Gibberelins also promote the formation of male flowers on genetically female plants, e.g., Cannabis. They also replace female flowers with ,male flowers on monoecious plants of cucurbits.
Related Questions: - Which of these are considered most essential in the origin of life?
- Megaspores are produced from the megaspore mother cells after
- AIDS virus causes reduction in
- The cork cambium, cork and secondary cortex are collectively called:
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Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of these are considered most essential in the origin of life?
- Megaspores are produced from the megaspore mother cells after
- AIDS virus causes reduction in
- The cork cambium, cork and secondary cortex are collectively called:
- When a dwarf pea plant was treated with gibberellic acid, it became as tall as tall pea
Topics: Plant Growth and Development (126)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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