| It was assumed that factors that are under photoperiodic control would show a clinal order among the ecotypes. |
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| Leaves communicate photoperiodic signals to meristems, stolons and buds in flowering, tuberization and dormancy. |
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| To expose gametophytes to particular photoperiodic conditions, the bagged Petri plates were placed in a light-tight box over which was installed the fluorescent source. |
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| Within species that show latitudinal variation in both thermal and photoperiodic response, that of photoperiodic response tracks the climatic gradient more closely. |
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| Under natural photoperiodic conditions protandry in hermaphrodite disc flowers of sunflower is determined by the different elongation rates of the style and filaments. |
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| A world-wide, north-south pattern of clinal photoperiodic adaptation correlated with stature has evolved in Cannabis. |
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| A photoperiodic response in gonadectomized Japanese quail exposed to a single long day. |
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| During this phase, photoperiodic control was not necessary because there was less than 13 hours of environmental light per day. |
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| Poinsettias are photoperiodic which means flowering is initiated by a change in day length. |
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| Photoperiodic induction of diapause hibernation and voltinism in Piezodorus hybneri. |
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| Photoperiodic control of diapause and climatic adaptation of the house spider, Achaearanea tepidariorum. |
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| Morgan PJ, Ross AW, Mercer JG, Barrett P Photoperiodic programming of body weight through the neuroendocrine hypothalamus. |
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| Photoperiodic control of the development of the LHRH neurosecretory system of European starlings during puberty and the onset of photorefractoriness. |
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| Photoperiodic responsiveness of equatorial and temperate-zone stonechats. |
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