Question

Critical day length photoperiodism.

Answer 1

Photoperiodic flowering plants are classified as long-day plants or short-day plants even though night is the critical factor because of the initial misunderstanding about daylight being the controlling factor. ... Each plant has a different length critical photoperiod, or critical night length.


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Answer 2

➡️CRITICAL daylength (critical day, critical photoperiod)：



$<b>$The length of day or light period in a 24-hour cycle required to induce flowering of long-day plants or to inhibit flowering of short-dayplants.