Examples of photoperiod

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Responses to photoperiod before and after jointing in wheat substitution lines.
Problems can also arise from algorithms that calculate important parameters in a model, such as daylength, which is used to determine a photoperiod response.
Effect of two opposing changes in photoperiod upon age at first egg in layer strains of pullets.
However, environmental conditions, such as temperature and photoperiod, are changeable in the field.
If the photoperiod exceeds 12 hours the plant remains vegetative and fails to produce grains.
The actual time scale will be in-uenced by temperature and photoperiod.
Fertility could be triggered by photoperiod together with increasing temperatures.
For incubation at daily fluctuating temperatures, the photoperiod coincided with the high temperature portion of the cycle.
Responses of leaf and tiller emergence and primordium initiation in wheat and barley to interchanged photoperiod.
Therefore, photoperiod-insensitive non-diapausing individuals or strains may overwinter in diapause states in fields as well as photoperiod-sensitive diapausing ones.
Hypothetical flowering promoters and inhibitors are emphasised in the photoperiod literature.
There was no indication that photoperiod alone could induce reproductive diapause.
Furthermore, the typically critical interactions between photoperiod and temperature eects on plant phenology have yet to be explored and quanti®ed.
Flowering of diverse maize cultivars in relation to temperature and photoperiod in multilocational field trials.
In temperate regions, these cycles are linked to large annual variations in temperature and photoperiod, and are readily detectable.

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