In papaya, sex expression can sometimes change due to physical injury, environmental stress, or hormonal imbalance. Normally, a male papaya plant produces only staminate (male) flowers and does not bear fruits. However, when the plant body or growing tip is injured, the balance of plant hormones may be disturbed. This can induce the development of bisexual (hermaphrodite) or female flowers on a male plant.
These newly formed flowers contain functional ovaries, so after pollination they can develop into fruits. This phenomenon is called sex reversal or sex modification in papaya.
Why this happens
- Injury affects the apical meristem and hormone regulation.
- Papaya is highly sensitive to environmental and physiological changes.
- Stress conditions (injury, temperature fluctuation, nutrition imbalance, pruning, etc.) may alter flower sex expression.
Important point
The fruits produced on such injured male plants are usually:
- fewer in number,
- irregular in shape,
- and sometimes temporary in occurrence.
This is a well-known characteristic of papaya (), which shows considerable plasticity in sex expression.
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