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Questions and Answers
What is the main naturally occurring auxin in plants?
What is the main naturally occurring auxin in plants?
- Gibberellins
- Abscisic Acid
- Indol-3-Acetic Acid (IAA) (correct)
- Cytokinins
Where are auxins primarily synthesized?
Where are auxins primarily synthesized?
- Root apical meristems (correct)
- Lateral meristems
- Meristems of apical buds
- Young leaves
Which phytohormone promotes growth of internodes by cell elongation?
Which phytohormone promotes growth of internodes by cell elongation?
- Gibberellins (correct)
- Cytokinins
- Ethylene
- Auxins
Which phytohormone delays leaf senescence?
Which phytohormone delays leaf senescence?
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What does auxin induce in cut stems?
What does auxin induce in cut stems?
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Study Notes
Auxins in Plants
- The main naturally occurring auxin in plants is indole-3-acetic acid (IAA).
- Auxins are primarily synthesized in the shoot apical meristem and young leaves, as well as in developing fruits.
Phytohormones and Their Functions
- Gibberellins are the phytohormones that promote the growth of internodes by facilitating cell elongation.
- Cytokinins are the phytohormones known for delaying leaf senescence, thus promoting cell division and growth.
Auxin Action
- Auxin induces the formation of roots in cut stems, aiding in the propagation of new plants.
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