Results 301 to 310 of about 58,693 (334)
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Time Measurement in Insect Photoperiodism: Reversal of a Photoperiodic Effect by Chilling
Science, 1967Spectacular reversals of the photoperiodic control of diapause are obtained if females of Nasonia vitripennis are chilled for 4 hours in certain light-dark cycles. Experiments in which chilling is combined with short light breaks (night interruptions) show that the first peak of diapause inhibition moves in response
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PHOTOPERIODISM IN AMARANTHUS CAUDATUS. I. A RE‐EXAMINATION OF THE PHOTOPERIODIC RESPONSE
American Journal of Botany, 1961Zabka, George G. (State U. Iowa, Iowa City.) Photoperiodism in Amaranthus caudatus. I. A re‐examination of the photoperiodic response. Amer. Jour. Bot. 48(1): 21–28. Illus. 1961.—Under the conditions described in this study, Amaranthus caudatus is not subject to inductive short days until it has reached its “sensitive period” or age which is ...
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Photoperiodism in Lemna: Reversal of Night-Interruption Depends on Color of the Main Photoperiod
Science, 1966With main photoperiods of red or white light, the inhibition of flowering in Lemna perpusilla 6746 caused by interruptions of the night with red light cannot be reversed by far-red light, since far-red light itself is highly inhibitory.
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2002
In photoperiodism induction occurs if a sufficiently long period of darkness or light is experienced. Rhythmicity can be demonstrated as responses to the timing of interruption of darkness by light (short-day plants, SDP), or additions of far-red light to constant white light (long-day plants, LDP). The resulting photoperiodic response rhythm (PRR) has
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In photoperiodism induction occurs if a sufficiently long period of darkness or light is experienced. Rhythmicity can be demonstrated as responses to the timing of interruption of darkness by light (short-day plants, SDP), or additions of far-red light to constant white light (long-day plants, LDP). The resulting photoperiodic response rhythm (PRR) has
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Photoperiodism dynamics during the domestication and improvement of soybean
Science China Life Sciences, 2017Shengrui Zhang +6 more
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1985
Photoperiod has been shown to affect the tissue levels of hormones in all of the major categories. More difficult to assess is the precise role of these variations in controlling the many responses of plants to daylength. The great range of photoperiodic behavior (see Vince-Prue 1975) precludes discussion of the hormonal regulation of all daylength ...
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Photoperiod has been shown to affect the tissue levels of hormones in all of the major categories. More difficult to assess is the precise role of these variations in controlling the many responses of plants to daylength. The great range of photoperiodic behavior (see Vince-Prue 1975) precludes discussion of the hormonal regulation of all daylength ...
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Phytochrome and photoperiodic induction
Physiologia Plantarum, 1991The photoreceptor phytochrome has been extensively characterized at the chromophore, protein and gene level. It consists of a family of red/far‐red reversible molecules and the genes for three members have been sequenced. Phytochromes are chromoproteins, which probably exist as dimers in vivo. Photoperiodism in higher plants involves the interaction of
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Photoperiodism of Male Offspring Production in the Water Flea Daphnia pulex
Zoological Science, 2017K. Toyota +3 more
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